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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.zookeeper;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.Closeable;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.ArrayList;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.List;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.concurrent.CopyOnWriteArrayList;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.concurrent.CountDownLatch;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.concurrent.ExecutorService;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.concurrent.Executors;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.concurrent.TimeUnit;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.regex.Matcher;</span> |
| <span class="source-line-no">030</span><span id="line-30">import java.util.regex.Pattern;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.Abortable;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.AuthUtil;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.ZooKeeperConnectionException;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.security.Superusers;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.trace.TraceUtil;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.util.Threads;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.security.UserGroupInformation;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.zookeeper.KeeperException;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.zookeeper.WatchedEvent;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.zookeeper.Watcher;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.zookeeper.ZooDefs.Ids;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.zookeeper.ZooDefs.Perms;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.zookeeper.data.ACL;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.zookeeper.data.Id;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.zookeeper.data.Stat;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.slf4j.Logger;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53">import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55">/**</span> |
| <span class="source-line-no">056</span><span id="line-56"> * Acts as the single ZooKeeper Watcher. One instance of this is instantiated for each Master,</span> |
| <span class="source-line-no">057</span><span id="line-57"> * RegionServer, and client process.</span> |
| <span class="source-line-no">058</span><span id="line-58"> * <p></span> |
| <span class="source-line-no">059</span><span id="line-59"> * This is the only class that implements {@link Watcher}. Other internal classes which need to be</span> |
| <span class="source-line-no">060</span><span id="line-60"> * notified of ZooKeeper events must register with the local instance of this watcher via</span> |
| <span class="source-line-no">061</span><span id="line-61"> * {@link #registerListener}.</span> |
| <span class="source-line-no">062</span><span id="line-62"> * <p></span> |
| <span class="source-line-no">063</span><span id="line-63"> * This class also holds and manages the connection to ZooKeeper. Code to deal with connection</span> |
| <span class="source-line-no">064</span><span id="line-64"> * related events and exceptions are handled here.</span> |
| <span class="source-line-no">065</span><span id="line-65"> */</span> |
| <span class="source-line-no">066</span><span id="line-66">@InterfaceAudience.Private</span> |
| <span class="source-line-no">067</span><span id="line-67">public class ZKWatcher implements Watcher, Abortable, Closeable {</span> |
| <span class="source-line-no">068</span><span id="line-68"> private static final Logger LOG = LoggerFactory.getLogger(ZKWatcher.class);</span> |
| <span class="source-line-no">069</span><span id="line-69"></span> |
| <span class="source-line-no">070</span><span id="line-70"> // Identifier for this watcher (for logging only). It is made of the prefix</span> |
| <span class="source-line-no">071</span><span id="line-71"> // passed on construction and the zookeeper sessionid.</span> |
| <span class="source-line-no">072</span><span id="line-72"> private final String prefix;</span> |
| <span class="source-line-no">073</span><span id="line-73"> private String identifier;</span> |
| <span class="source-line-no">074</span><span id="line-74"></span> |
| <span class="source-line-no">075</span><span id="line-75"> // zookeeper quorum</span> |
| <span class="source-line-no">076</span><span id="line-76"> private final String quorum;</span> |
| <span class="source-line-no">077</span><span id="line-77"></span> |
| <span class="source-line-no">078</span><span id="line-78"> // zookeeper connection</span> |
| <span class="source-line-no">079</span><span id="line-79"> private final RecoverableZooKeeper recoverableZooKeeper;</span> |
| <span class="source-line-no">080</span><span id="line-80"></span> |
| <span class="source-line-no">081</span><span id="line-81"> // abortable in case of zk failure</span> |
| <span class="source-line-no">082</span><span id="line-82"> protected Abortable abortable;</span> |
| <span class="source-line-no">083</span><span id="line-83"> // Used if abortable is null</span> |
| <span class="source-line-no">084</span><span id="line-84"> private boolean aborted = false;</span> |
| <span class="source-line-no">085</span><span id="line-85"></span> |
| <span class="source-line-no">086</span><span id="line-86"> private final ZNodePaths znodePaths;</span> |
| <span class="source-line-no">087</span><span id="line-87"></span> |
| <span class="source-line-no">088</span><span id="line-88"> // listeners to be notified</span> |
| <span class="source-line-no">089</span><span id="line-89"> private final List<ZKListener> listeners = new CopyOnWriteArrayList<>();</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> // Single threaded executor pool that processes event notifications from Zookeeper. Events are</span> |
| <span class="source-line-no">092</span><span id="line-92"> // processed in the order in which they arrive (pool backed by an unbounded fifo queue). We do</span> |
| <span class="source-line-no">093</span><span id="line-93"> // this to decouple the event processing from Zookeeper's ClientCnxn's EventThread context.</span> |
| <span class="source-line-no">094</span><span id="line-94"> // EventThread internally runs a single while loop to serially process all the events. When events</span> |
| <span class="source-line-no">095</span><span id="line-95"> // are processed by the listeners in the same thread, that blocks the EventThread from processing</span> |
| <span class="source-line-no">096</span><span id="line-96"> // subsequent events. Processing events in a separate thread frees up the event thread to continue</span> |
| <span class="source-line-no">097</span><span id="line-97"> // and further prevents deadlocks if the process method itself makes other zookeeper calls.</span> |
| <span class="source-line-no">098</span><span id="line-98"> // It is ok to do it in a single thread because the Zookeeper ClientCnxn already serializes the</span> |
| <span class="source-line-no">099</span><span id="line-99"> // requests using a single while loop and hence there is no performance degradation.</span> |
| <span class="source-line-no">100</span><span id="line-100"> private final ExecutorService zkEventProcessor = Executors</span> |
| <span class="source-line-no">101</span><span id="line-101"> .newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat("zk-event-processor-pool-%d")</span> |
| <span class="source-line-no">102</span><span id="line-102"> .setDaemon(true).setUncaughtExceptionHandler(Threads.LOGGING_EXCEPTION_HANDLER).build());</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> private final Configuration conf;</span> |
| <span class="source-line-no">105</span><span id="line-105"></span> |
| <span class="source-line-no">106</span><span id="line-106"> private final long zkSyncTimeout;</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> /* A pattern that matches a Kerberos name, borrowed from Hadoop's KerberosName */</span> |
| <span class="source-line-no">109</span><span id="line-109"> private static final Pattern NAME_PATTERN = Pattern.compile("([^/@]*)(/([^/@]*))?@([^/@]*)");</span> |
| <span class="source-line-no">110</span><span id="line-110"></span> |
| <span class="source-line-no">111</span><span id="line-111"> /**</span> |
| <span class="source-line-no">112</span><span id="line-112"> * Instantiate a ZooKeeper connection and watcher.</span> |
| <span class="source-line-no">113</span><span id="line-113"> * @param identifier string that is passed to RecoverableZookeeper to be used as identifier for</span> |
| <span class="source-line-no">114</span><span id="line-114"> * this instance. Use null for default.</span> |
| <span class="source-line-no">115</span><span id="line-115"> * @throws IOException if the connection to ZooKeeper fails</span> |
| <span class="source-line-no">116</span><span id="line-116"> * @throws ZooKeeperConnectionException if the client can't connect to ZooKeeper</span> |
| <span class="source-line-no">117</span><span id="line-117"> */</span> |
| <span class="source-line-no">118</span><span id="line-118"> public ZKWatcher(Configuration conf, String identifier, Abortable abortable)</span> |
| <span class="source-line-no">119</span><span id="line-119"> throws ZooKeeperConnectionException, IOException {</span> |
| <span class="source-line-no">120</span><span id="line-120"> this(conf, identifier, abortable, false);</span> |
| <span class="source-line-no">121</span><span id="line-121"> }</span> |
| <span class="source-line-no">122</span><span id="line-122"></span> |
| <span class="source-line-no">123</span><span id="line-123"> /**</span> |
| <span class="source-line-no">124</span><span id="line-124"> * Instantiate a ZooKeeper connection and watcher.</span> |
| <span class="source-line-no">125</span><span id="line-125"> * @param conf the configuration to use</span> |
| <span class="source-line-no">126</span><span id="line-126"> * @param identifier string that is passed to RecoverableZookeeper to be used as</span> |
| <span class="source-line-no">127</span><span id="line-127"> * identifier for this instance. Use null for default.</span> |
| <span class="source-line-no">128</span><span id="line-128"> * @param abortable Can be null if there is on error there is no host to abort: e.g.</span> |
| <span class="source-line-no">129</span><span id="line-129"> * client context.</span> |
| <span class="source-line-no">130</span><span id="line-130"> * @param canCreateBaseZNode true if a base ZNode can be created</span> |
| <span class="source-line-no">131</span><span id="line-131"> * @throws IOException if the connection to ZooKeeper fails</span> |
| <span class="source-line-no">132</span><span id="line-132"> * @throws ZooKeeperConnectionException if the client can't connect to ZooKeeper</span> |
| <span class="source-line-no">133</span><span id="line-133"> */</span> |
| <span class="source-line-no">134</span><span id="line-134"> public ZKWatcher(Configuration conf, String identifier, Abortable abortable,</span> |
| <span class="source-line-no">135</span><span id="line-135"> boolean canCreateBaseZNode) throws IOException, ZooKeeperConnectionException {</span> |
| <span class="source-line-no">136</span><span id="line-136"> this(conf, identifier, abortable, canCreateBaseZNode, false);</span> |
| <span class="source-line-no">137</span><span id="line-137"> }</span> |
| <span class="source-line-no">138</span><span id="line-138"></span> |
| <span class="source-line-no">139</span><span id="line-139"> /**</span> |
| <span class="source-line-no">140</span><span id="line-140"> * Instantiate a ZooKeeper connection and watcher.</span> |
| <span class="source-line-no">141</span><span id="line-141"> * @param conf the configuration to use</span> |
| <span class="source-line-no">142</span><span id="line-142"> * @param identifier string that is passed to RecoverableZookeeper to be used as</span> |
| <span class="source-line-no">143</span><span id="line-143"> * identifier for this instance. Use null for default.</span> |
| <span class="source-line-no">144</span><span id="line-144"> * @param abortable Can be null if there is on error there is no host to abort: e.g.</span> |
| <span class="source-line-no">145</span><span id="line-145"> * client context.</span> |
| <span class="source-line-no">146</span><span id="line-146"> * @param canCreateBaseZNode true if a base ZNode can be created</span> |
| <span class="source-line-no">147</span><span id="line-147"> * @param clientZK whether this watcher is set to access client ZK</span> |
| <span class="source-line-no">148</span><span id="line-148"> * @throws IOException if the connection to ZooKeeper fails</span> |
| <span class="source-line-no">149</span><span id="line-149"> * @throws ZooKeeperConnectionException if the connection to Zookeeper fails when create base</span> |
| <span class="source-line-no">150</span><span id="line-150"> * ZNodes</span> |
| <span class="source-line-no">151</span><span id="line-151"> */</span> |
| <span class="source-line-no">152</span><span id="line-152"> public ZKWatcher(Configuration conf, String identifier, Abortable abortable,</span> |
| <span class="source-line-no">153</span><span id="line-153"> boolean canCreateBaseZNode, boolean clientZK) throws IOException, ZooKeeperConnectionException {</span> |
| <span class="source-line-no">154</span><span id="line-154"> this.conf = conf;</span> |
| <span class="source-line-no">155</span><span id="line-155"> if (clientZK) {</span> |
| <span class="source-line-no">156</span><span id="line-156"> String clientZkQuorumServers = ZKConfig.getClientZKQuorumServersString(conf);</span> |
| <span class="source-line-no">157</span><span id="line-157"> String serverZkQuorumServers = ZKConfig.getZKQuorumServersString(conf);</span> |
| <span class="source-line-no">158</span><span id="line-158"> if (clientZkQuorumServers != null) {</span> |
| <span class="source-line-no">159</span><span id="line-159"> if (clientZkQuorumServers.equals(serverZkQuorumServers)) {</span> |
| <span class="source-line-no">160</span><span id="line-160"> // Don't allow same settings to avoid dead loop when master trying</span> |
| <span class="source-line-no">161</span><span id="line-161"> // to sync meta information from server ZK to client ZK</span> |
| <span class="source-line-no">162</span><span id="line-162"> throw new IllegalArgumentException(</span> |
| <span class="source-line-no">163</span><span id="line-163"> "The quorum settings for client ZK should be different from those for server");</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"> this.quorum = clientZkQuorumServers;</span> |
| <span class="source-line-no">166</span><span id="line-166"> } else {</span> |
| <span class="source-line-no">167</span><span id="line-167"> this.quorum = serverZkQuorumServers;</span> |
| <span class="source-line-no">168</span><span id="line-168"> }</span> |
| <span class="source-line-no">169</span><span id="line-169"> } else {</span> |
| <span class="source-line-no">170</span><span id="line-170"> this.quorum = ZKConfig.getZKQuorumServersString(conf);</span> |
| <span class="source-line-no">171</span><span id="line-171"> }</span> |
| <span class="source-line-no">172</span><span id="line-172"> this.prefix = identifier;</span> |
| <span class="source-line-no">173</span><span id="line-173"> // Identifier will get the sessionid appended later below down when we</span> |
| <span class="source-line-no">174</span><span id="line-174"> // handle the syncconnect event.</span> |
| <span class="source-line-no">175</span><span id="line-175"> this.identifier = identifier + "0x0";</span> |
| <span class="source-line-no">176</span><span id="line-176"> this.abortable = abortable;</span> |
| <span class="source-line-no">177</span><span id="line-177"> this.znodePaths = new ZNodePaths(conf);</span> |
| <span class="source-line-no">178</span><span id="line-178"> PendingWatcher pendingWatcher = new PendingWatcher();</span> |
| <span class="source-line-no">179</span><span id="line-179"> this.recoverableZooKeeper = RecoverableZooKeeper.connect(conf, quorum, pendingWatcher,</span> |
| <span class="source-line-no">180</span><span id="line-180"> identifier, ZKConfig.getZKClientConfig(conf));</span> |
| <span class="source-line-no">181</span><span id="line-181"> pendingWatcher.prepare(this);</span> |
| <span class="source-line-no">182</span><span id="line-182"> if (canCreateBaseZNode) {</span> |
| <span class="source-line-no">183</span><span id="line-183"> try {</span> |
| <span class="source-line-no">184</span><span id="line-184"> createBaseZNodes();</span> |
| <span class="source-line-no">185</span><span id="line-185"> } catch (ZooKeeperConnectionException zce) {</span> |
| <span class="source-line-no">186</span><span id="line-186"> try {</span> |
| <span class="source-line-no">187</span><span id="line-187"> this.recoverableZooKeeper.close();</span> |
| <span class="source-line-no">188</span><span id="line-188"> } catch (InterruptedException ie) {</span> |
| <span class="source-line-no">189</span><span id="line-189"> LOG.debug("Encountered InterruptedException when closing {}", this.recoverableZooKeeper);</span> |
| <span class="source-line-no">190</span><span id="line-190"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">191</span><span id="line-191"> }</span> |
| <span class="source-line-no">192</span><span id="line-192"> throw zce;</span> |
| <span class="source-line-no">193</span><span id="line-193"> }</span> |
| <span class="source-line-no">194</span><span id="line-194"> }</span> |
| <span class="source-line-no">195</span><span id="line-195"> this.zkSyncTimeout = conf.getLong(HConstants.ZK_SYNC_BLOCKING_TIMEOUT_MS,</span> |
| <span class="source-line-no">196</span><span id="line-196"> HConstants.ZK_SYNC_BLOCKING_TIMEOUT_DEFAULT_MS);</span> |
| <span class="source-line-no">197</span><span id="line-197"> }</span> |
| <span class="source-line-no">198</span><span id="line-198"></span> |
| <span class="source-line-no">199</span><span id="line-199"> public List<ACL> createACL(String node) {</span> |
| <span class="source-line-no">200</span><span id="line-200"> return createACL(node, ZKAuthentication.isSecureZooKeeper(getConfiguration()));</span> |
| <span class="source-line-no">201</span><span id="line-201"> }</span> |
| <span class="source-line-no">202</span><span id="line-202"></span> |
| <span class="source-line-no">203</span><span id="line-203"> public List<ACL> createACL(String node, boolean isSecureZooKeeper) {</span> |
| <span class="source-line-no">204</span><span id="line-204"> if (!node.startsWith(getZNodePaths().baseZNode)) {</span> |
| <span class="source-line-no">205</span><span id="line-205"> return Ids.OPEN_ACL_UNSAFE;</span> |
| <span class="source-line-no">206</span><span id="line-206"> }</span> |
| <span class="source-line-no">207</span><span id="line-207"> if (isSecureZooKeeper) {</span> |
| <span class="source-line-no">208</span><span id="line-208"> ArrayList<ACL> acls = new ArrayList<>();</span> |
| <span class="source-line-no">209</span><span id="line-209"> // add permission to hbase supper user</span> |
| <span class="source-line-no">210</span><span id="line-210"> String[] superUsers = getConfiguration().getStrings(Superusers.SUPERUSER_CONF_KEY);</span> |
| <span class="source-line-no">211</span><span id="line-211"> String hbaseUser = null;</span> |
| <span class="source-line-no">212</span><span id="line-212"> try {</span> |
| <span class="source-line-no">213</span><span id="line-213"> hbaseUser = UserGroupInformation.getCurrentUser().getShortUserName();</span> |
| <span class="source-line-no">214</span><span id="line-214"> } catch (IOException e) {</span> |
| <span class="source-line-no">215</span><span id="line-215"> LOG.debug("Could not acquire current User.", e);</span> |
| <span class="source-line-no">216</span><span id="line-216"> }</span> |
| <span class="source-line-no">217</span><span id="line-217"> if (superUsers != null) {</span> |
| <span class="source-line-no">218</span><span id="line-218"> List<String> groups = new ArrayList<>();</span> |
| <span class="source-line-no">219</span><span id="line-219"> for (String user : superUsers) {</span> |
| <span class="source-line-no">220</span><span id="line-220"> if (AuthUtil.isGroupPrincipal(user)) {</span> |
| <span class="source-line-no">221</span><span id="line-221"> // TODO: Set node ACL for groups when ZK supports this feature</span> |
| <span class="source-line-no">222</span><span id="line-222"> groups.add(user);</span> |
| <span class="source-line-no">223</span><span id="line-223"> } else {</span> |
| <span class="source-line-no">224</span><span id="line-224"> if (!user.equals(hbaseUser)) {</span> |
| <span class="source-line-no">225</span><span id="line-225"> acls.add(new ACL(Perms.ALL, new Id("sasl", user)));</span> |
| <span class="source-line-no">226</span><span id="line-226"> }</span> |
| <span class="source-line-no">227</span><span id="line-227"> }</span> |
| <span class="source-line-no">228</span><span id="line-228"> }</span> |
| <span class="source-line-no">229</span><span id="line-229"> if (!groups.isEmpty()) {</span> |
| <span class="source-line-no">230</span><span id="line-230"> LOG.warn("Znode ACL setting for group {} is skipped, ZooKeeper doesn't support this "</span> |
| <span class="source-line-no">231</span><span id="line-231"> + "feature presently.", groups);</span> |
| <span class="source-line-no">232</span><span id="line-232"> }</span> |
| <span class="source-line-no">233</span><span id="line-233"> }</span> |
| <span class="source-line-no">234</span><span id="line-234"> // Certain znodes are accessed directly by the client,</span> |
| <span class="source-line-no">235</span><span id="line-235"> // so they must be readable by non-authenticated clients</span> |
| <span class="source-line-no">236</span><span id="line-236"> if (getZNodePaths().isClientReadable(node)) {</span> |
| <span class="source-line-no">237</span><span id="line-237"> acls.addAll(Ids.CREATOR_ALL_ACL);</span> |
| <span class="source-line-no">238</span><span id="line-238"> acls.addAll(Ids.READ_ACL_UNSAFE);</span> |
| <span class="source-line-no">239</span><span id="line-239"> } else {</span> |
| <span class="source-line-no">240</span><span id="line-240"> acls.addAll(Ids.CREATOR_ALL_ACL);</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"> return acls;</span> |
| <span class="source-line-no">243</span><span id="line-243"> } else {</span> |
| <span class="source-line-no">244</span><span id="line-244"> return Ids.OPEN_ACL_UNSAFE;</span> |
| <span class="source-line-no">245</span><span id="line-245"> }</span> |
| <span class="source-line-no">246</span><span id="line-246"> }</span> |
| <span class="source-line-no">247</span><span id="line-247"></span> |
| <span class="source-line-no">248</span><span id="line-248"> private void createBaseZNodes() throws ZooKeeperConnectionException {</span> |
| <span class="source-line-no">249</span><span id="line-249"> try {</span> |
| <span class="source-line-no">250</span><span id="line-250"> // Create all the necessary "directories" of znodes</span> |
| <span class="source-line-no">251</span><span id="line-251"> ZKUtil.createWithParents(this, znodePaths.baseZNode);</span> |
| <span class="source-line-no">252</span><span id="line-252"> ZKUtil.createAndFailSilent(this, znodePaths.rsZNode);</span> |
| <span class="source-line-no">253</span><span id="line-253"> ZKUtil.createAndFailSilent(this, znodePaths.drainingZNode);</span> |
| <span class="source-line-no">254</span><span id="line-254"> ZKUtil.createAndFailSilent(this, znodePaths.tableZNode);</span> |
| <span class="source-line-no">255</span><span id="line-255"> ZKUtil.createAndFailSilent(this, znodePaths.splitLogZNode);</span> |
| <span class="source-line-no">256</span><span id="line-256"> ZKUtil.createAndFailSilent(this, znodePaths.backupMasterAddressesZNode);</span> |
| <span class="source-line-no">257</span><span id="line-257"> ZKUtil.createAndFailSilent(this, znodePaths.masterMaintZNode);</span> |
| <span class="source-line-no">258</span><span id="line-258"> } catch (KeeperException e) {</span> |
| <span class="source-line-no">259</span><span id="line-259"> throw new ZooKeeperConnectionException(</span> |
| <span class="source-line-no">260</span><span id="line-260"> prefix("Unexpected KeeperException creating base node"), e);</span> |
| <span class="source-line-no">261</span><span id="line-261"> }</span> |
| <span class="source-line-no">262</span><span id="line-262"> }</span> |
| <span class="source-line-no">263</span><span id="line-263"></span> |
| <span class="source-line-no">264</span><span id="line-264"> /**</span> |
| <span class="source-line-no">265</span><span id="line-265"> * On master start, we check the znode ACLs under the root directory and set the ACLs properly if</span> |
| <span class="source-line-no">266</span><span id="line-266"> * needed. If the cluster goes from an unsecure setup to a secure setup, this step is needed so</span> |
| <span class="source-line-no">267</span><span id="line-267"> * that the existing znodes created with open permissions are now changed with restrictive perms.</span> |
| <span class="source-line-no">268</span><span id="line-268"> */</span> |
| <span class="source-line-no">269</span><span id="line-269"> public void checkAndSetZNodeAcls() {</span> |
| <span class="source-line-no">270</span><span id="line-270"> if (!ZKAuthentication.isSecureZooKeeper(getConfiguration())) {</span> |
| <span class="source-line-no">271</span><span id="line-271"> LOG.info("not a secure deployment, proceeding");</span> |
| <span class="source-line-no">272</span><span id="line-272"> return;</span> |
| <span class="source-line-no">273</span><span id="line-273"> }</span> |
| <span class="source-line-no">274</span><span id="line-274"></span> |
| <span class="source-line-no">275</span><span id="line-275"> // Check the base znodes permission first. Only do the recursion if base znode's perms are not</span> |
| <span class="source-line-no">276</span><span id="line-276"> // correct.</span> |
| <span class="source-line-no">277</span><span id="line-277"> try {</span> |
| <span class="source-line-no">278</span><span id="line-278"> List<ACL> actualAcls = recoverableZooKeeper.getAcl(znodePaths.baseZNode, new Stat());</span> |
| <span class="source-line-no">279</span><span id="line-279"></span> |
| <span class="source-line-no">280</span><span id="line-280"> if (!isBaseZnodeAclSetup(actualAcls)) {</span> |
| <span class="source-line-no">281</span><span id="line-281"> LOG.info("setting znode ACLs");</span> |
| <span class="source-line-no">282</span><span id="line-282"> setZnodeAclsRecursive(znodePaths.baseZNode);</span> |
| <span class="source-line-no">283</span><span id="line-283"> }</span> |
| <span class="source-line-no">284</span><span id="line-284"> } catch (KeeperException.NoNodeException nne) {</span> |
| <span class="source-line-no">285</span><span id="line-285"> return;</span> |
| <span class="source-line-no">286</span><span id="line-286"> } catch (InterruptedException ie) {</span> |
| <span class="source-line-no">287</span><span id="line-287"> interruptedExceptionNoThrow(ie, false);</span> |
| <span class="source-line-no">288</span><span id="line-288"> } catch (IOException | KeeperException e) {</span> |
| <span class="source-line-no">289</span><span id="line-289"> LOG.warn("Received exception while checking and setting zookeeper ACLs", e);</span> |
| <span class="source-line-no">290</span><span id="line-290"> }</span> |
| <span class="source-line-no">291</span><span id="line-291"> }</span> |
| <span class="source-line-no">292</span><span id="line-292"></span> |
| <span class="source-line-no">293</span><span id="line-293"> /**</span> |
| <span class="source-line-no">294</span><span id="line-294"> * Set the znode perms recursively. This will do post-order recursion, so that baseZnode ACLs will</span> |
| <span class="source-line-no">295</span><span id="line-295"> * be set last in case the master fails in between.</span> |
| <span class="source-line-no">296</span><span id="line-296"> * @param znode the ZNode to set the permissions for</span> |
| <span class="source-line-no">297</span><span id="line-297"> */</span> |
| <span class="source-line-no">298</span><span id="line-298"> private void setZnodeAclsRecursive(String znode) throws KeeperException, InterruptedException {</span> |
| <span class="source-line-no">299</span><span id="line-299"> List<String> children = recoverableZooKeeper.getChildren(znode, false);</span> |
| <span class="source-line-no">300</span><span id="line-300"></span> |
| <span class="source-line-no">301</span><span id="line-301"> for (String child : children) {</span> |
| <span class="source-line-no">302</span><span id="line-302"> setZnodeAclsRecursive(ZNodePaths.joinZNode(znode, child));</span> |
| <span class="source-line-no">303</span><span id="line-303"> }</span> |
| <span class="source-line-no">304</span><span id="line-304"> List<ACL> acls = createACL(znode, true);</span> |
| <span class="source-line-no">305</span><span id="line-305"> LOG.info("Setting ACLs for znode:{} , acl:{}", znode, acls);</span> |
| <span class="source-line-no">306</span><span id="line-306"> recoverableZooKeeper.setAcl(znode, acls, -1);</span> |
| <span class="source-line-no">307</span><span id="line-307"> }</span> |
| <span class="source-line-no">308</span><span id="line-308"></span> |
| <span class="source-line-no">309</span><span id="line-309"> /**</span> |
| <span class="source-line-no">310</span><span id="line-310"> * Checks whether the ACLs returned from the base znode (/hbase) is set for secure setup.</span> |
| <span class="source-line-no">311</span><span id="line-311"> * @param acls acls from zookeeper</span> |
| <span class="source-line-no">312</span><span id="line-312"> * @return whether ACLs are set for the base znode</span> |
| <span class="source-line-no">313</span><span id="line-313"> * @throws IOException if getting the current user fails</span> |
| <span class="source-line-no">314</span><span id="line-314"> */</span> |
| <span class="source-line-no">315</span><span id="line-315"> private boolean isBaseZnodeAclSetup(List<ACL> acls) throws IOException {</span> |
| <span class="source-line-no">316</span><span id="line-316"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">317</span><span id="line-317"> LOG.debug("Checking znode ACLs");</span> |
| <span class="source-line-no">318</span><span id="line-318"> }</span> |
| <span class="source-line-no">319</span><span id="line-319"> String[] superUsers = conf.getStrings(Superusers.SUPERUSER_CONF_KEY);</span> |
| <span class="source-line-no">320</span><span id="line-320"> // Check whether ACL set for all superusers</span> |
| <span class="source-line-no">321</span><span id="line-321"> if (superUsers != null && !checkACLForSuperUsers(superUsers, acls)) {</span> |
| <span class="source-line-no">322</span><span id="line-322"> return false;</span> |
| <span class="source-line-no">323</span><span id="line-323"> }</span> |
| <span class="source-line-no">324</span><span id="line-324"></span> |
| <span class="source-line-no">325</span><span id="line-325"> // this assumes that current authenticated user is the same as zookeeper client user</span> |
| <span class="source-line-no">326</span><span id="line-326"> // configured via JAAS</span> |
| <span class="source-line-no">327</span><span id="line-327"> String hbaseUser = UserGroupInformation.getCurrentUser().getShortUserName();</span> |
| <span class="source-line-no">328</span><span id="line-328"></span> |
| <span class="source-line-no">329</span><span id="line-329"> if (acls.isEmpty()) {</span> |
| <span class="source-line-no">330</span><span id="line-330"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">331</span><span id="line-331"> LOG.debug("ACL is empty");</span> |
| <span class="source-line-no">332</span><span id="line-332"> }</span> |
| <span class="source-line-no">333</span><span id="line-333"> return false;</span> |
| <span class="source-line-no">334</span><span id="line-334"> }</span> |
| <span class="source-line-no">335</span><span id="line-335"></span> |
| <span class="source-line-no">336</span><span id="line-336"> for (ACL acl : acls) {</span> |
| <span class="source-line-no">337</span><span id="line-337"> int perms = acl.getPerms();</span> |
| <span class="source-line-no">338</span><span id="line-338"> Id id = acl.getId();</span> |
| <span class="source-line-no">339</span><span id="line-339"> // We should only set at most 3 possible ACLs for 3 Ids. One for everyone, one for superuser</span> |
| <span class="source-line-no">340</span><span id="line-340"> // and one for the hbase user</span> |
| <span class="source-line-no">341</span><span id="line-341"> if (Ids.ANYONE_ID_UNSAFE.equals(id)) {</span> |
| <span class="source-line-no">342</span><span id="line-342"> if (perms != Perms.READ) {</span> |
| <span class="source-line-no">343</span><span id="line-343"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">344</span><span id="line-344"> LOG.debug(String.format("permissions for '%s' are not correct: have 0x%x, want 0x%x",</span> |
| <span class="source-line-no">345</span><span id="line-345"> id, perms, Perms.READ));</span> |
| <span class="source-line-no">346</span><span id="line-346"> }</span> |
| <span class="source-line-no">347</span><span id="line-347"> return false;</span> |
| <span class="source-line-no">348</span><span id="line-348"> }</span> |
| <span class="source-line-no">349</span><span id="line-349"> } else if (superUsers != null && isSuperUserId(superUsers, id)) {</span> |
| <span class="source-line-no">350</span><span id="line-350"> if (perms != Perms.ALL) {</span> |
| <span class="source-line-no">351</span><span id="line-351"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">352</span><span id="line-352"> LOG.debug(String.format("permissions for '%s' are not correct: have 0x%x, want 0x%x",</span> |
| <span class="source-line-no">353</span><span id="line-353"> id, perms, Perms.ALL));</span> |
| <span class="source-line-no">354</span><span id="line-354"> }</span> |
| <span class="source-line-no">355</span><span id="line-355"> return false;</span> |
| <span class="source-line-no">356</span><span id="line-356"> }</span> |
| <span class="source-line-no">357</span><span id="line-357"> } else if ("sasl".equals(id.getScheme())) {</span> |
| <span class="source-line-no">358</span><span id="line-358"> String name = id.getId();</span> |
| <span class="source-line-no">359</span><span id="line-359"> // If ZooKeeper recorded the Kerberos full name in the ACL, use only the shortname</span> |
| <span class="source-line-no">360</span><span id="line-360"> Matcher match = NAME_PATTERN.matcher(name);</span> |
| <span class="source-line-no">361</span><span id="line-361"> if (match.matches()) {</span> |
| <span class="source-line-no">362</span><span id="line-362"> name = match.group(1);</span> |
| <span class="source-line-no">363</span><span id="line-363"> }</span> |
| <span class="source-line-no">364</span><span id="line-364"> if (name.equals(hbaseUser)) {</span> |
| <span class="source-line-no">365</span><span id="line-365"> if (perms != Perms.ALL) {</span> |
| <span class="source-line-no">366</span><span id="line-366"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">367</span><span id="line-367"> LOG.debug(String.format("permissions for '%s' are not correct: have 0x%x, want 0x%x",</span> |
| <span class="source-line-no">368</span><span id="line-368"> id, perms, Perms.ALL));</span> |
| <span class="source-line-no">369</span><span id="line-369"> }</span> |
| <span class="source-line-no">370</span><span id="line-370"> return false;</span> |
| <span class="source-line-no">371</span><span id="line-371"> }</span> |
| <span class="source-line-no">372</span><span id="line-372"> } else {</span> |
| <span class="source-line-no">373</span><span id="line-373"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">374</span><span id="line-374"> LOG.debug("Unexpected shortname in SASL ACL: {}", id);</span> |
| <span class="source-line-no">375</span><span id="line-375"> }</span> |
| <span class="source-line-no">376</span><span id="line-376"> return false;</span> |
| <span class="source-line-no">377</span><span id="line-377"> }</span> |
| <span class="source-line-no">378</span><span id="line-378"> } else {</span> |
| <span class="source-line-no">379</span><span id="line-379"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">380</span><span id="line-380"> LOG.debug("unexpected ACL id '{}'", id);</span> |
| <span class="source-line-no">381</span><span id="line-381"> }</span> |
| <span class="source-line-no">382</span><span id="line-382"> return false;</span> |
| <span class="source-line-no">383</span><span id="line-383"> }</span> |
| <span class="source-line-no">384</span><span id="line-384"> }</span> |
| <span class="source-line-no">385</span><span id="line-385"> return true;</span> |
| <span class="source-line-no">386</span><span id="line-386"> }</span> |
| <span class="source-line-no">387</span><span id="line-387"></span> |
| <span class="source-line-no">388</span><span id="line-388"> /*</span> |
| <span class="source-line-no">389</span><span id="line-389"> * Validate whether ACL set for all superusers.</span> |
| <span class="source-line-no">390</span><span id="line-390"> */</span> |
| <span class="source-line-no">391</span><span id="line-391"> private boolean checkACLForSuperUsers(String[] superUsers, List<ACL> acls) {</span> |
| <span class="source-line-no">392</span><span id="line-392"> for (String user : superUsers) {</span> |
| <span class="source-line-no">393</span><span id="line-393"> boolean hasAccess = false;</span> |
| <span class="source-line-no">394</span><span id="line-394"> // TODO: Validate super group members also when ZK supports setting node ACL for groups.</span> |
| <span class="source-line-no">395</span><span id="line-395"> if (!AuthUtil.isGroupPrincipal(user)) {</span> |
| <span class="source-line-no">396</span><span id="line-396"> for (ACL acl : acls) {</span> |
| <span class="source-line-no">397</span><span id="line-397"> if (user.equals(acl.getId().getId())) {</span> |
| <span class="source-line-no">398</span><span id="line-398"> if (acl.getPerms() == Perms.ALL) {</span> |
| <span class="source-line-no">399</span><span id="line-399"> hasAccess = true;</span> |
| <span class="source-line-no">400</span><span id="line-400"> } else {</span> |
| <span class="source-line-no">401</span><span id="line-401"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">402</span><span id="line-402"> LOG.debug(String.format(</span> |
| <span class="source-line-no">403</span><span id="line-403"> "superuser '%s' does not have correct permissions: have 0x%x, want 0x%x",</span> |
| <span class="source-line-no">404</span><span id="line-404"> acl.getId().getId(), acl.getPerms(), Perms.ALL));</span> |
| <span class="source-line-no">405</span><span id="line-405"> }</span> |
| <span class="source-line-no">406</span><span id="line-406"> }</span> |
| <span class="source-line-no">407</span><span id="line-407"> break;</span> |
| <span class="source-line-no">408</span><span id="line-408"> }</span> |
| <span class="source-line-no">409</span><span id="line-409"> }</span> |
| <span class="source-line-no">410</span><span id="line-410"> if (!hasAccess) {</span> |
| <span class="source-line-no">411</span><span id="line-411"> return false;</span> |
| <span class="source-line-no">412</span><span id="line-412"> }</span> |
| <span class="source-line-no">413</span><span id="line-413"> }</span> |
| <span class="source-line-no">414</span><span id="line-414"> }</span> |
| <span class="source-line-no">415</span><span id="line-415"> return true;</span> |
| <span class="source-line-no">416</span><span id="line-416"> }</span> |
| <span class="source-line-no">417</span><span id="line-417"></span> |
| <span class="source-line-no">418</span><span id="line-418"> /*</span> |
| <span class="source-line-no">419</span><span id="line-419"> * Validate whether ACL ID is superuser.</span> |
| <span class="source-line-no">420</span><span id="line-420"> */</span> |
| <span class="source-line-no">421</span><span id="line-421"> public static boolean isSuperUserId(String[] superUsers, Id id) {</span> |
| <span class="source-line-no">422</span><span id="line-422"> for (String user : superUsers) {</span> |
| <span class="source-line-no">423</span><span id="line-423"> // TODO: Validate super group members also when ZK supports setting node ACL for groups.</span> |
| <span class="source-line-no">424</span><span id="line-424"> if (!AuthUtil.isGroupPrincipal(user) && new Id("sasl", user).equals(id)) {</span> |
| <span class="source-line-no">425</span><span id="line-425"> return true;</span> |
| <span class="source-line-no">426</span><span id="line-426"> }</span> |
| <span class="source-line-no">427</span><span id="line-427"> }</span> |
| <span class="source-line-no">428</span><span id="line-428"> return false;</span> |
| <span class="source-line-no">429</span><span id="line-429"> }</span> |
| <span class="source-line-no">430</span><span id="line-430"></span> |
| <span class="source-line-no">431</span><span id="line-431"> @Override</span> |
| <span class="source-line-no">432</span><span id="line-432"> public String toString() {</span> |
| <span class="source-line-no">433</span><span id="line-433"> return this.identifier + ", quorum=" + quorum + ", baseZNode=" + znodePaths.baseZNode;</span> |
| <span class="source-line-no">434</span><span id="line-434"> }</span> |
| <span class="source-line-no">435</span><span id="line-435"></span> |
| <span class="source-line-no">436</span><span id="line-436"> /**</span> |
| <span class="source-line-no">437</span><span id="line-437"> * Adds this instance's identifier as a prefix to the passed <code>str</code></span> |
| <span class="source-line-no">438</span><span id="line-438"> * @param str String to amend.</span> |
| <span class="source-line-no">439</span><span id="line-439"> * @return A new string with this instance's identifier as prefix: e.g. if passed 'hello world',</span> |
| <span class="source-line-no">440</span><span id="line-440"> * the returned string could be</span> |
| <span class="source-line-no">441</span><span id="line-441"> */</span> |
| <span class="source-line-no">442</span><span id="line-442"> public String prefix(final String str) {</span> |
| <span class="source-line-no">443</span><span id="line-443"> return this.toString() + " " + str;</span> |
| <span class="source-line-no">444</span><span id="line-444"> }</span> |
| <span class="source-line-no">445</span><span id="line-445"></span> |
| <span class="source-line-no">446</span><span id="line-446"> /**</span> |
| <span class="source-line-no">447</span><span id="line-447"> * Get the znodes corresponding to the meta replicas from ZK</span> |
| <span class="source-line-no">448</span><span id="line-448"> * @return list of znodes</span> |
| <span class="source-line-no">449</span><span id="line-449"> * @throws KeeperException if a ZooKeeper operation fails</span> |
| <span class="source-line-no">450</span><span id="line-450"> */</span> |
| <span class="source-line-no">451</span><span id="line-451"> public List<String> getMetaReplicaNodes() throws KeeperException {</span> |
| <span class="source-line-no">452</span><span id="line-452"> List<String> childrenOfBaseNode = ZKUtil.listChildrenNoWatch(this, znodePaths.baseZNode);</span> |
| <span class="source-line-no">453</span><span id="line-453"> return filterMetaReplicaNodes(childrenOfBaseNode);</span> |
| <span class="source-line-no">454</span><span id="line-454"> }</span> |
| <span class="source-line-no">455</span><span id="line-455"></span> |
| <span class="source-line-no">456</span><span id="line-456"> /**</span> |
| <span class="source-line-no">457</span><span id="line-457"> * Same as {@link #getMetaReplicaNodes()} except that this also registers a watcher on base znode</span> |
| <span class="source-line-no">458</span><span id="line-458"> * for subsequent CREATE/DELETE operations on child nodes.</span> |
| <span class="source-line-no">459</span><span id="line-459"> */</span> |
| <span class="source-line-no">460</span><span id="line-460"> public List<String> getMetaReplicaNodesAndWatchChildren() throws KeeperException {</span> |
| <span class="source-line-no">461</span><span id="line-461"> List<String> childrenOfBaseNode =</span> |
| <span class="source-line-no">462</span><span id="line-462"> ZKUtil.listChildrenAndWatchForNewChildren(this, znodePaths.baseZNode);</span> |
| <span class="source-line-no">463</span><span id="line-463"> // Need to throw here instead of returning an empty list if the base znode hasn't been created</span> |
| <span class="source-line-no">464</span><span id="line-464"> // Caller should retry in that case, versus thinking the base znode has a watcher set</span> |
| <span class="source-line-no">465</span><span id="line-465"> if (childrenOfBaseNode == null) {</span> |
| <span class="source-line-no">466</span><span id="line-466"> keeperException(new KeeperException.NoNodeException(znodePaths.baseZNode));</span> |
| <span class="source-line-no">467</span><span id="line-467"> }</span> |
| <span class="source-line-no">468</span><span id="line-468"> return filterMetaReplicaNodes(childrenOfBaseNode);</span> |
| <span class="source-line-no">469</span><span id="line-469"> }</span> |
| <span class="source-line-no">470</span><span id="line-470"></span> |
| <span class="source-line-no">471</span><span id="line-471"> /**</span> |
| <span class="source-line-no">472</span><span id="line-472"> * @param nodes Input list of znodes</span> |
| <span class="source-line-no">473</span><span id="line-473"> * @return Filtered list of znodes from nodes that belong to meta replica(s).</span> |
| <span class="source-line-no">474</span><span id="line-474"> */</span> |
| <span class="source-line-no">475</span><span id="line-475"> private List<String> filterMetaReplicaNodes(List<String> nodes) {</span> |
| <span class="source-line-no">476</span><span id="line-476"> if (nodes == null || nodes.isEmpty()) {</span> |
| <span class="source-line-no">477</span><span id="line-477"> return new ArrayList<>();</span> |
| <span class="source-line-no">478</span><span id="line-478"> }</span> |
| <span class="source-line-no">479</span><span id="line-479"> List<String> metaReplicaNodes = new ArrayList<>(2);</span> |
| <span class="source-line-no">480</span><span id="line-480"> String pattern = conf.get(ZNodePaths.META_ZNODE_PREFIX_CONF_KEY, ZNodePaths.META_ZNODE_PREFIX);</span> |
| <span class="source-line-no">481</span><span id="line-481"> for (String child : nodes) {</span> |
| <span class="source-line-no">482</span><span id="line-482"> if (child.startsWith(pattern)) {</span> |
| <span class="source-line-no">483</span><span id="line-483"> metaReplicaNodes.add(child);</span> |
| <span class="source-line-no">484</span><span id="line-484"> }</span> |
| <span class="source-line-no">485</span><span id="line-485"> }</span> |
| <span class="source-line-no">486</span><span id="line-486"> return metaReplicaNodes;</span> |
| <span class="source-line-no">487</span><span id="line-487"> }</span> |
| <span class="source-line-no">488</span><span id="line-488"></span> |
| <span class="source-line-no">489</span><span id="line-489"> /**</span> |
| <span class="source-line-no">490</span><span id="line-490"> * Register the specified listener to receive ZooKeeper events.</span> |
| <span class="source-line-no">491</span><span id="line-491"> * @param listener the listener to register</span> |
| <span class="source-line-no">492</span><span id="line-492"> */</span> |
| <span class="source-line-no">493</span><span id="line-493"> public void registerListener(ZKListener listener) {</span> |
| <span class="source-line-no">494</span><span id="line-494"> listeners.add(listener);</span> |
| <span class="source-line-no">495</span><span id="line-495"> }</span> |
| <span class="source-line-no">496</span><span id="line-496"></span> |
| <span class="source-line-no">497</span><span id="line-497"> /**</span> |
| <span class="source-line-no">498</span><span id="line-498"> * Register the specified listener to receive ZooKeeper events and add it as the first in the list</span> |
| <span class="source-line-no">499</span><span id="line-499"> * of current listeners.</span> |
| <span class="source-line-no">500</span><span id="line-500"> * @param listener the listener to register</span> |
| <span class="source-line-no">501</span><span id="line-501"> */</span> |
| <span class="source-line-no">502</span><span id="line-502"> public void registerListenerFirst(ZKListener listener) {</span> |
| <span class="source-line-no">503</span><span id="line-503"> listeners.add(0, listener);</span> |
| <span class="source-line-no">504</span><span id="line-504"> }</span> |
| <span class="source-line-no">505</span><span id="line-505"></span> |
| <span class="source-line-no">506</span><span id="line-506"> public void unregisterListener(ZKListener listener) {</span> |
| <span class="source-line-no">507</span><span id="line-507"> listeners.remove(listener);</span> |
| <span class="source-line-no">508</span><span id="line-508"> }</span> |
| <span class="source-line-no">509</span><span id="line-509"></span> |
| <span class="source-line-no">510</span><span id="line-510"> /**</span> |
| <span class="source-line-no">511</span><span id="line-511"> * Clean all existing listeners</span> |
| <span class="source-line-no">512</span><span id="line-512"> */</span> |
| <span class="source-line-no">513</span><span id="line-513"> public void unregisterAllListeners() {</span> |
| <span class="source-line-no">514</span><span id="line-514"> listeners.clear();</span> |
| <span class="source-line-no">515</span><span id="line-515"> }</span> |
| <span class="source-line-no">516</span><span id="line-516"></span> |
| <span class="source-line-no">517</span><span id="line-517"> /**</span> |
| <span class="source-line-no">518</span><span id="line-518"> * Get a copy of current registered listeners</span> |
| <span class="source-line-no">519</span><span id="line-519"> */</span> |
| <span class="source-line-no">520</span><span id="line-520"> public List<ZKListener> getListeners() {</span> |
| <span class="source-line-no">521</span><span id="line-521"> return new ArrayList<>(listeners);</span> |
| <span class="source-line-no">522</span><span id="line-522"> }</span> |
| <span class="source-line-no">523</span><span id="line-523"></span> |
| <span class="source-line-no">524</span><span id="line-524"> /** Returns The number of currently registered listeners */</span> |
| <span class="source-line-no">525</span><span id="line-525"> public int getNumberOfListeners() {</span> |
| <span class="source-line-no">526</span><span id="line-526"> return listeners.size();</span> |
| <span class="source-line-no">527</span><span id="line-527"> }</span> |
| <span class="source-line-no">528</span><span id="line-528"></span> |
| <span class="source-line-no">529</span><span id="line-529"> /**</span> |
| <span class="source-line-no">530</span><span id="line-530"> * Get the connection to ZooKeeper.</span> |
| <span class="source-line-no">531</span><span id="line-531"> * @return connection reference to zookeeper</span> |
| <span class="source-line-no">532</span><span id="line-532"> */</span> |
| <span class="source-line-no">533</span><span id="line-533"> public RecoverableZooKeeper getRecoverableZooKeeper() {</span> |
| <span class="source-line-no">534</span><span id="line-534"> return recoverableZooKeeper;</span> |
| <span class="source-line-no">535</span><span id="line-535"> }</span> |
| <span class="source-line-no">536</span><span id="line-536"></span> |
| <span class="source-line-no">537</span><span id="line-537"> public void reconnectAfterExpiration() throws IOException, KeeperException, InterruptedException {</span> |
| <span class="source-line-no">538</span><span id="line-538"> recoverableZooKeeper.reconnectAfterExpiration();</span> |
| <span class="source-line-no">539</span><span id="line-539"> }</span> |
| <span class="source-line-no">540</span><span id="line-540"></span> |
| <span class="source-line-no">541</span><span id="line-541"> /**</span> |
| <span class="source-line-no">542</span><span id="line-542"> * Get the quorum address of this instance.</span> |
| <span class="source-line-no">543</span><span id="line-543"> * @return quorum string of this zookeeper connection instance</span> |
| <span class="source-line-no">544</span><span id="line-544"> */</span> |
| <span class="source-line-no">545</span><span id="line-545"> public String getQuorum() {</span> |
| <span class="source-line-no">546</span><span id="line-546"> return quorum;</span> |
| <span class="source-line-no">547</span><span id="line-547"> }</span> |
| <span class="source-line-no">548</span><span id="line-548"></span> |
| <span class="source-line-no">549</span><span id="line-549"> /**</span> |
| <span class="source-line-no">550</span><span id="line-550"> * Get the znodePaths.</span> |
| <span class="source-line-no">551</span><span id="line-551"> * <p></span> |
| <span class="source-line-no">552</span><span id="line-552"> * Mainly used for mocking as mockito can not mock a field access.</span> |
| <span class="source-line-no">553</span><span id="line-553"> */</span> |
| <span class="source-line-no">554</span><span id="line-554"> public ZNodePaths getZNodePaths() {</span> |
| <span class="source-line-no">555</span><span id="line-555"> return znodePaths;</span> |
| <span class="source-line-no">556</span><span id="line-556"> }</span> |
| <span class="source-line-no">557</span><span id="line-557"></span> |
| <span class="source-line-no">558</span><span id="line-558"> private void processEvent(WatchedEvent event) {</span> |
| <span class="source-line-no">559</span><span id="line-559"> TraceUtil.trace(() -> {</span> |
| <span class="source-line-no">560</span><span id="line-560"> switch (event.getType()) {</span> |
| <span class="source-line-no">561</span><span id="line-561"> // If event type is NONE, this is a connection status change</span> |
| <span class="source-line-no">562</span><span id="line-562"> case None: {</span> |
| <span class="source-line-no">563</span><span id="line-563"> connectionEvent(event);</span> |
| <span class="source-line-no">564</span><span id="line-564"> break;</span> |
| <span class="source-line-no">565</span><span id="line-565"> }</span> |
| <span class="source-line-no">566</span><span id="line-566"></span> |
| <span class="source-line-no">567</span><span id="line-567"> // Otherwise pass along to the listeners</span> |
| <span class="source-line-no">568</span><span id="line-568"> case NodeCreated: {</span> |
| <span class="source-line-no">569</span><span id="line-569"> for (ZKListener listener : listeners) {</span> |
| <span class="source-line-no">570</span><span id="line-570"> listener.nodeCreated(event.getPath());</span> |
| <span class="source-line-no">571</span><span id="line-571"> }</span> |
| <span class="source-line-no">572</span><span id="line-572"> break;</span> |
| <span class="source-line-no">573</span><span id="line-573"> }</span> |
| <span class="source-line-no">574</span><span id="line-574"></span> |
| <span class="source-line-no">575</span><span id="line-575"> case NodeDeleted: {</span> |
| <span class="source-line-no">576</span><span id="line-576"> for (ZKListener listener : listeners) {</span> |
| <span class="source-line-no">577</span><span id="line-577"> listener.nodeDeleted(event.getPath());</span> |
| <span class="source-line-no">578</span><span id="line-578"> }</span> |
| <span class="source-line-no">579</span><span id="line-579"> break;</span> |
| <span class="source-line-no">580</span><span id="line-580"> }</span> |
| <span class="source-line-no">581</span><span id="line-581"></span> |
| <span class="source-line-no">582</span><span id="line-582"> case NodeDataChanged: {</span> |
| <span class="source-line-no">583</span><span id="line-583"> for (ZKListener listener : listeners) {</span> |
| <span class="source-line-no">584</span><span id="line-584"> listener.nodeDataChanged(event.getPath());</span> |
| <span class="source-line-no">585</span><span id="line-585"> }</span> |
| <span class="source-line-no">586</span><span id="line-586"> break;</span> |
| <span class="source-line-no">587</span><span id="line-587"> }</span> |
| <span class="source-line-no">588</span><span id="line-588"></span> |
| <span class="source-line-no">589</span><span id="line-589"> case NodeChildrenChanged: {</span> |
| <span class="source-line-no">590</span><span id="line-590"> for (ZKListener listener : listeners) {</span> |
| <span class="source-line-no">591</span><span id="line-591"> listener.nodeChildrenChanged(event.getPath());</span> |
| <span class="source-line-no">592</span><span id="line-592"> }</span> |
| <span class="source-line-no">593</span><span id="line-593"> break;</span> |
| <span class="source-line-no">594</span><span id="line-594"> }</span> |
| <span class="source-line-no">595</span><span id="line-595"> default:</span> |
| <span class="source-line-no">596</span><span id="line-596"> LOG.error("Invalid event of type {} received for path {}. Ignoring.", event.getState(),</span> |
| <span class="source-line-no">597</span><span id="line-597"> event.getPath());</span> |
| <span class="source-line-no">598</span><span id="line-598"> }</span> |
| <span class="source-line-no">599</span><span id="line-599"> }, "ZKWatcher.processEvent: " + event.getType() + " " + event.getPath());</span> |
| <span class="source-line-no">600</span><span id="line-600"> }</span> |
| <span class="source-line-no">601</span><span id="line-601"></span> |
| <span class="source-line-no">602</span><span id="line-602"> /**</span> |
| <span class="source-line-no">603</span><span id="line-603"> * Method called from ZooKeeper for events and connection status.</span> |
| <span class="source-line-no">604</span><span id="line-604"> * <p></span> |
| <span class="source-line-no">605</span><span id="line-605"> * Valid events are passed along to listeners. Connection status changes are dealt with locally.</span> |
| <span class="source-line-no">606</span><span id="line-606"> */</span> |
| <span class="source-line-no">607</span><span id="line-607"> @Override</span> |
| <span class="source-line-no">608</span><span id="line-608"> public void process(WatchedEvent event) {</span> |
| <span class="source-line-no">609</span><span id="line-609"> LOG.debug(prefix("Received ZooKeeper Event, " + "type=" + event.getType() + ", " + "state="</span> |
| <span class="source-line-no">610</span><span id="line-610"> + event.getState() + ", " + "path=" + event.getPath()));</span> |
| <span class="source-line-no">611</span><span id="line-611"> final String spanName = ZKWatcher.class.getSimpleName() + "-" + identifier;</span> |
| <span class="source-line-no">612</span><span id="line-612"> if (!zkEventProcessor.isShutdown()) {</span> |
| <span class="source-line-no">613</span><span id="line-613"> zkEventProcessor.execute(TraceUtil.tracedRunnable(() -> processEvent(event), spanName));</span> |
| <span class="source-line-no">614</span><span id="line-614"> }</span> |
| <span class="source-line-no">615</span><span id="line-615"> }</span> |
| <span class="source-line-no">616</span><span id="line-616"></span> |
| <span class="source-line-no">617</span><span id="line-617"> // Connection management</span> |
| <span class="source-line-no">618</span><span id="line-618"></span> |
| <span class="source-line-no">619</span><span id="line-619"> /**</span> |
| <span class="source-line-no">620</span><span id="line-620"> * Called when there is a connection-related event via the Watcher callback.</span> |
| <span class="source-line-no">621</span><span id="line-621"> * <p></span> |
| <span class="source-line-no">622</span><span id="line-622"> * If Disconnected or Expired, this should shutdown the cluster. But, since we send a</span> |
| <span class="source-line-no">623</span><span id="line-623"> * KeeperException.SessionExpiredException along with the abort call, it's possible for the</span> |
| <span class="source-line-no">624</span><span id="line-624"> * Abortable to catch it and try to create a new session with ZooKeeper. This is what the client</span> |
| <span class="source-line-no">625</span><span id="line-625"> * does in HCM.</span> |
| <span class="source-line-no">626</span><span id="line-626"> * <p></span> |
| <span class="source-line-no">627</span><span id="line-627"> * @param event the connection-related event</span> |
| <span class="source-line-no">628</span><span id="line-628"> */</span> |
| <span class="source-line-no">629</span><span id="line-629"> private void connectionEvent(WatchedEvent event) {</span> |
| <span class="source-line-no">630</span><span id="line-630"> switch (event.getState()) {</span> |
| <span class="source-line-no">631</span><span id="line-631"> case SyncConnected:</span> |
| <span class="source-line-no">632</span><span id="line-632"> this.identifier =</span> |
| <span class="source-line-no">633</span><span id="line-633"> this.prefix + "-0x" + Long.toHexString(this.recoverableZooKeeper.getSessionId());</span> |
| <span class="source-line-no">634</span><span id="line-634"> // Update our identifier. Otherwise ignore.</span> |
| <span class="source-line-no">635</span><span id="line-635"> LOG.debug("{} connected", this.identifier);</span> |
| <span class="source-line-no">636</span><span id="line-636"> break;</span> |
| <span class="source-line-no">637</span><span id="line-637"></span> |
| <span class="source-line-no">638</span><span id="line-638"> // Abort the server if Disconnected or Expired</span> |
| <span class="source-line-no">639</span><span id="line-639"> case Disconnected:</span> |
| <span class="source-line-no">640</span><span id="line-640"> LOG.debug(prefix("Received Disconnected from ZooKeeper, ignoring"));</span> |
| <span class="source-line-no">641</span><span id="line-641"> break;</span> |
| <span class="source-line-no">642</span><span id="line-642"></span> |
| <span class="source-line-no">643</span><span id="line-643"> case Closed:</span> |
| <span class="source-line-no">644</span><span id="line-644"> LOG.debug(prefix("ZooKeeper client closed, ignoring"));</span> |
| <span class="source-line-no">645</span><span id="line-645"> break;</span> |
| <span class="source-line-no">646</span><span id="line-646"></span> |
| <span class="source-line-no">647</span><span id="line-647"> case Expired:</span> |
| <span class="source-line-no">648</span><span id="line-648"> String msg = prefix(this.identifier + " received expired from " + "ZooKeeper, aborting");</span> |
| <span class="source-line-no">649</span><span id="line-649"> // TODO: One thought is to add call to ZKListener so say,</span> |
| <span class="source-line-no">650</span><span id="line-650"> // ZKNodeTracker can zero out its data values.</span> |
| <span class="source-line-no">651</span><span id="line-651"> if (this.abortable != null) {</span> |
| <span class="source-line-no">652</span><span id="line-652"> this.abortable.abort(msg, new KeeperException.SessionExpiredException());</span> |
| <span class="source-line-no">653</span><span id="line-653"> }</span> |
| <span class="source-line-no">654</span><span id="line-654"> break;</span> |
| <span class="source-line-no">655</span><span id="line-655"></span> |
| <span class="source-line-no">656</span><span id="line-656"> case ConnectedReadOnly:</span> |
| <span class="source-line-no">657</span><span id="line-657"> case SaslAuthenticated:</span> |
| <span class="source-line-no">658</span><span id="line-658"> case AuthFailed:</span> |
| <span class="source-line-no">659</span><span id="line-659"> break;</span> |
| <span class="source-line-no">660</span><span id="line-660"></span> |
| <span class="source-line-no">661</span><span id="line-661"> default:</span> |
| <span class="source-line-no">662</span><span id="line-662"> throw new IllegalStateException("Received event is not valid: " + event.getState());</span> |
| <span class="source-line-no">663</span><span id="line-663"> }</span> |
| <span class="source-line-no">664</span><span id="line-664"> }</span> |
| <span class="source-line-no">665</span><span id="line-665"></span> |
| <span class="source-line-no">666</span><span id="line-666"> /**</span> |
| <span class="source-line-no">667</span><span id="line-667"> * Forces a synchronization of this ZooKeeper client connection within a timeout. Enforcing a</span> |
| <span class="source-line-no">668</span><span id="line-668"> * timeout lets the callers fail-fast rather than wait forever for the sync to finish.</span> |
| <span class="source-line-no">669</span><span id="line-669"> * <p></span> |
| <span class="source-line-no">670</span><span id="line-670"> * Executing this method before running other methods will ensure that the subsequent operations</span> |
| <span class="source-line-no">671</span><span id="line-671"> * are up-to-date and consistent as of the time that the sync is complete.</span> |
| <span class="source-line-no">672</span><span id="line-672"> * <p></span> |
| <span class="source-line-no">673</span><span id="line-673"> * This is used for compareAndSwap type operations where we need to read the data of an existing</span> |
| <span class="source-line-no">674</span><span id="line-674"> * node and delete or transition that node, utilizing the previously read version and data. We</span> |
| <span class="source-line-no">675</span><span id="line-675"> * want to ensure that the version read is up-to-date from when we begin the operation.</span> |
| <span class="source-line-no">676</span><span id="line-676"> * <p></span> |
| <span class="source-line-no">677</span><span id="line-677"> */</span> |
| <span class="source-line-no">678</span><span id="line-678"> public void syncOrTimeout(String path) throws KeeperException {</span> |
| <span class="source-line-no">679</span><span id="line-679"> final CountDownLatch latch = new CountDownLatch(1);</span> |
| <span class="source-line-no">680</span><span id="line-680"> long startTime = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">681</span><span id="line-681"> this.recoverableZooKeeper.sync(path, (i, s, o) -> latch.countDown(), null);</span> |
| <span class="source-line-no">682</span><span id="line-682"> try {</span> |
| <span class="source-line-no">683</span><span id="line-683"> if (!latch.await(zkSyncTimeout, TimeUnit.MILLISECONDS)) {</span> |
| <span class="source-line-no">684</span><span id="line-684"> LOG.warn("sync() operation to ZK timed out. Configured timeout: {}ms. This usually points "</span> |
| <span class="source-line-no">685</span><span id="line-685"> + "to a ZK side issue. Check ZK server logs and metrics.", zkSyncTimeout);</span> |
| <span class="source-line-no">686</span><span id="line-686"> throw new KeeperException.RequestTimeoutException();</span> |
| <span class="source-line-no">687</span><span id="line-687"> }</span> |
| <span class="source-line-no">688</span><span id="line-688"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">689</span><span id="line-689"> LOG.warn("Interrupted waiting for ZK sync() to finish.", e);</span> |
| <span class="source-line-no">690</span><span id="line-690"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">691</span><span id="line-691"> return;</span> |
| <span class="source-line-no">692</span><span id="line-692"> }</span> |
| <span class="source-line-no">693</span><span id="line-693"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">694</span><span id="line-694"> // TODO: Switch to a metric once server side ZK watcher metrics are implemented. This is a</span> |
| <span class="source-line-no">695</span><span id="line-695"> // useful metric to have since the latency of sync() impacts the callers.</span> |
| <span class="source-line-no">696</span><span id="line-696"> LOG.debug("ZK sync() operation took {}ms", EnvironmentEdgeManager.currentTime() - startTime);</span> |
| <span class="source-line-no">697</span><span id="line-697"> }</span> |
| <span class="source-line-no">698</span><span id="line-698"> }</span> |
| <span class="source-line-no">699</span><span id="line-699"></span> |
| <span class="source-line-no">700</span><span id="line-700"> /**</span> |
| <span class="source-line-no">701</span><span id="line-701"> * Handles KeeperExceptions in client calls.</span> |
| <span class="source-line-no">702</span><span id="line-702"> * <p></span> |
| <span class="source-line-no">703</span><span id="line-703"> * This may be temporary but for now this gives one place to deal with these.</span> |
| <span class="source-line-no">704</span><span id="line-704"> * <p></span> |
| <span class="source-line-no">705</span><span id="line-705"> * TODO: Currently this method rethrows the exception to let the caller handle</span> |
| <span class="source-line-no">706</span><span id="line-706"> * <p></span> |
| <span class="source-line-no">707</span><span id="line-707"> * @param ke the exception to rethrow</span> |
| <span class="source-line-no">708</span><span id="line-708"> * @throws KeeperException if a ZooKeeper operation fails</span> |
| <span class="source-line-no">709</span><span id="line-709"> */</span> |
| <span class="source-line-no">710</span><span id="line-710"> public void keeperException(KeeperException ke) throws KeeperException {</span> |
| <span class="source-line-no">711</span><span id="line-711"> LOG.error(prefix("Received unexpected KeeperException, re-throwing exception"), ke);</span> |
| <span class="source-line-no">712</span><span id="line-712"> throw ke;</span> |
| <span class="source-line-no">713</span><span id="line-713"> }</span> |
| <span class="source-line-no">714</span><span id="line-714"></span> |
| <span class="source-line-no">715</span><span id="line-715"> /**</span> |
| <span class="source-line-no">716</span><span id="line-716"> * Handles InterruptedExceptions in client calls.</span> |
| <span class="source-line-no">717</span><span id="line-717"> * @param ie the InterruptedException instance thrown</span> |
| <span class="source-line-no">718</span><span id="line-718"> * @throws KeeperException the exception to throw, transformed from the InterruptedException</span> |
| <span class="source-line-no">719</span><span id="line-719"> */</span> |
| <span class="source-line-no">720</span><span id="line-720"> public void interruptedException(InterruptedException ie) throws KeeperException {</span> |
| <span class="source-line-no">721</span><span id="line-721"> interruptedExceptionNoThrow(ie, true);</span> |
| <span class="source-line-no">722</span><span id="line-722"> // Throw a system error exception to let upper level handle it</span> |
| <span class="source-line-no">723</span><span id="line-723"> KeeperException keeperException = new KeeperException.SystemErrorException();</span> |
| <span class="source-line-no">724</span><span id="line-724"> keeperException.initCause(ie);</span> |
| <span class="source-line-no">725</span><span id="line-725"> throw keeperException;</span> |
| <span class="source-line-no">726</span><span id="line-726"> }</span> |
| <span class="source-line-no">727</span><span id="line-727"></span> |
| <span class="source-line-no">728</span><span id="line-728"> /**</span> |
| <span class="source-line-no">729</span><span id="line-729"> * Log the InterruptedException and interrupt current thread</span> |
| <span class="source-line-no">730</span><span id="line-730"> * @param ie The IterruptedException to log</span> |
| <span class="source-line-no">731</span><span id="line-731"> * @param throwLater Whether we will throw the exception latter</span> |
| <span class="source-line-no">732</span><span id="line-732"> */</span> |
| <span class="source-line-no">733</span><span id="line-733"> public void interruptedExceptionNoThrow(InterruptedException ie, boolean throwLater) {</span> |
| <span class="source-line-no">734</span><span id="line-734"> LOG.debug(prefix("Received InterruptedException, will interrupt current thread"</span> |
| <span class="source-line-no">735</span><span id="line-735"> + (throwLater ? " and rethrow a SystemErrorException" : "")), ie);</span> |
| <span class="source-line-no">736</span><span id="line-736"> // At least preserve interrupt.</span> |
| <span class="source-line-no">737</span><span id="line-737"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">738</span><span id="line-738"> }</span> |
| <span class="source-line-no">739</span><span id="line-739"></span> |
| <span class="source-line-no">740</span><span id="line-740"> /**</span> |
| <span class="source-line-no">741</span><span id="line-741"> * Close the connection to ZooKeeper.</span> |
| <span class="source-line-no">742</span><span id="line-742"> */</span> |
| <span class="source-line-no">743</span><span id="line-743"> @Override</span> |
| <span class="source-line-no">744</span><span id="line-744"> public void close() {</span> |
| <span class="source-line-no">745</span><span id="line-745"> zkEventProcessor.shutdown();</span> |
| <span class="source-line-no">746</span><span id="line-746"> try {</span> |
| <span class="source-line-no">747</span><span id="line-747"> if (!zkEventProcessor.awaitTermination(15, TimeUnit.SECONDS)) {</span> |
| <span class="source-line-no">748</span><span id="line-748"> LOG.warn("ZKWatcher event processor has not finished to terminate.");</span> |
| <span class="source-line-no">749</span><span id="line-749"> zkEventProcessor.shutdownNow();</span> |
| <span class="source-line-no">750</span><span id="line-750"> }</span> |
| <span class="source-line-no">751</span><span id="line-751"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">752</span><span id="line-752"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">753</span><span id="line-753"> } finally {</span> |
| <span class="source-line-no">754</span><span id="line-754"> try {</span> |
| <span class="source-line-no">755</span><span id="line-755"> recoverableZooKeeper.close();</span> |
| <span class="source-line-no">756</span><span id="line-756"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">757</span><span id="line-757"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">758</span><span id="line-758"> }</span> |
| <span class="source-line-no">759</span><span id="line-759"> }</span> |
| <span class="source-line-no">760</span><span id="line-760"> }</span> |
| <span class="source-line-no">761</span><span id="line-761"></span> |
| <span class="source-line-no">762</span><span id="line-762"> public Configuration getConfiguration() {</span> |
| <span class="source-line-no">763</span><span id="line-763"> return conf;</span> |
| <span class="source-line-no">764</span><span id="line-764"> }</span> |
| <span class="source-line-no">765</span><span id="line-765"></span> |
| <span class="source-line-no">766</span><span id="line-766"> @Override</span> |
| <span class="source-line-no">767</span><span id="line-767"> public void abort(String why, Throwable e) {</span> |
| <span class="source-line-no">768</span><span id="line-768"> if (this.abortable != null) {</span> |
| <span class="source-line-no">769</span><span id="line-769"> this.abortable.abort(why, e);</span> |
| <span class="source-line-no">770</span><span id="line-770"> } else {</span> |
| <span class="source-line-no">771</span><span id="line-771"> this.aborted = true;</span> |
| <span class="source-line-no">772</span><span id="line-772"> }</span> |
| <span class="source-line-no">773</span><span id="line-773"> }</span> |
| <span class="source-line-no">774</span><span id="line-774"></span> |
| <span class="source-line-no">775</span><span id="line-775"> @Override</span> |
| <span class="source-line-no">776</span><span id="line-776"> public boolean isAborted() {</span> |
| <span class="source-line-no">777</span><span id="line-777"> return this.abortable == null ? this.aborted : this.abortable.isAborted();</span> |
| <span class="source-line-no">778</span><span id="line-778"> }</span> |
| <span class="source-line-no">779</span><span id="line-779">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
