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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.util;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.FileNotFoundException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.InterruptedIOException;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.lang.reflect.Method;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.conf.Configuration;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.fs.FileSystem;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.fs.FilterFileSystem;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.fs.Path;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hdfs.DistributedFileSystem;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.slf4j.Logger;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.slf4j.LoggerFactory;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span>/**<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * Utility methods for recovering file lease for hdfs.<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> */<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>@InterfaceAudience.Private<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>public final class RecoverLeaseFSUtils {<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><a name="line.39"></a> |
| <span class="sourceLineNo">040</span> private static final Logger LOG = LoggerFactory.getLogger(RecoverLeaseFSUtils.class);<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private RecoverLeaseFSUtils() {<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> }<a name="line.43"></a> |
| <span class="sourceLineNo">044</span><a name="line.44"></a> |
| <span class="sourceLineNo">045</span> public static void recoverFileLease(FileSystem fs, Path p, Configuration conf)<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> throws IOException {<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> recoverFileLease(fs, p, conf, null);<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> }<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> /**<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * Recover the lease from HDFS, retrying multiple times.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> */<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> public static void recoverFileLease(FileSystem fs, Path p, Configuration conf,<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> CancelableProgressable reporter) throws IOException {<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> if (fs instanceof FilterFileSystem) {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> fs = ((FilterFileSystem) fs).getRawFileSystem();<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> }<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> // lease recovery not needed for local file system case.<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> if (!(fs instanceof DistributedFileSystem)) {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> return;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> }<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> recoverDFSFileLease((DistributedFileSystem) fs, p, conf, reporter);<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> }<a name="line.63"></a> |
| <span class="sourceLineNo">064</span><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> /*<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * Run the dfs recover lease. recoverLease is asynchronous. It returns: -false when it starts the<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * lease recovery (i.e. lease recovery not *yet* done) - true when the lease recovery has<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * succeeded or the file is closed. But, we have to be careful. Each time we call recoverLease, it<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * starts the recover lease process over from the beginning. We could put ourselves in a situation<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * where we are doing nothing but starting a recovery, interrupting it to start again, and so on.<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * The findings over in HBASE-8354 have it that the namenode will try to recover the lease on the<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * file's primary node. If all is well, it should return near immediately. But, as is common, it<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * is the very primary node that has crashed and so the namenode will be stuck waiting on a socket<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * timeout before it will ask another datanode to start the recovery. It does not help if we call<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * recoverLease in the meantime and in particular, after the socket timeout, a recoverLease<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * invocation will cause us to start over from square one (possibly waiting on socket timeout<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * against primary node). So, in the below, we do the following: 1. Call recoverLease. 2. If it<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * returns true, break. 3. If it returns false, wait a few seconds and then call it again. 4. If<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> * it returns true, break. 5. If it returns false, wait for what we think the datanode socket<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * timeout is (configurable) and then try again. 6. If it returns true, break. 7. If it returns<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * false, repeat starting at step 5. above. If HDFS-4525 is available, call it every second, and<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * we might be able to exit early.<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> */<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> private static boolean recoverDFSFileLease(final DistributedFileSystem dfs, final Path p,<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> final Configuration conf, final CancelableProgressable reporter) throws IOException {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> LOG.info("Recover lease on dfs file " + p);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> long startWaiting = EnvironmentEdgeManager.currentTime();<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> // Default is 15 minutes. It's huge, but the idea is that if we have a major issue, HDFS<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> // usually needs 10 minutes before marking the nodes as dead. So we're putting ourselves<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> // beyond that limit 'to be safe'.<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> long recoveryTimeout = conf.getInt("hbase.lease.recovery.timeout", 900000) + startWaiting;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> // This setting should be a little above what the cluster dfs heartbeat is set to.<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> long firstPause = conf.getInt("hbase.lease.recovery.first.pause", 4000);<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> // This should be set to how long it'll take for us to timeout against primary datanode if it<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> // is dead. We set it to 64 seconds, 4 seconds than the default READ_TIMEOUT in HDFS, the<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> // default value for DFS_CLIENT_SOCKET_TIMEOUT_KEY. If recovery is still failing after this<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> // timeout, then further recovery will take liner backoff with this base, to avoid endless<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> // preemptions when this value is not properly configured.<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> long subsequentPauseBase = conf.getLong("hbase.lease.recovery.dfs.timeout", 64 * 1000);<a name="line.99"></a> |
| <span class="sourceLineNo">100</span><a name="line.100"></a> |
| <span class="sourceLineNo">101</span> Method isFileClosedMeth = null;<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> // whether we need to look for isFileClosed method<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> boolean findIsFileClosedMeth = true;<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> boolean recovered = false;<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> // We break the loop if we succeed the lease recovery, timeout, or we throw an exception.<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> for (int nbAttempt = 0; !recovered; nbAttempt++) {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> recovered = recoverLease(dfs, nbAttempt, p, startWaiting);<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> if (recovered) {<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> break;<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> }<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> checkIfCancelled(reporter);<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> if (checkIfTimedout(conf, recoveryTimeout, nbAttempt, p, startWaiting)) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> break;<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> try {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> // On the first time through wait the short 'firstPause'.<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> if (nbAttempt == 0) {<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> Thread.sleep(firstPause);<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> } else {<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> // Cycle here until (subsequentPause * nbAttempt) elapses. While spinning, check<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> // isFileClosed if available (should be in hadoop 2.0.5... not in hadoop 1 though).<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> long localStartWaiting = EnvironmentEdgeManager.currentTime();<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> while (<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> (EnvironmentEdgeManager.currentTime() - localStartWaiting)<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> < subsequentPauseBase * nbAttempt<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> ) {<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> Thread.sleep(conf.getInt("hbase.lease.recovery.pause", 1000));<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> if (findIsFileClosedMeth) {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> try {<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> isFileClosedMeth =<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> dfs.getClass().getMethod("isFileClosed", new Class[] { Path.class });<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> } catch (NoSuchMethodException nsme) {<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> LOG.debug("isFileClosed not available");<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> } finally {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> findIsFileClosedMeth = false;<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> }<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> if (isFileClosedMeth != null && isFileClosed(dfs, isFileClosedMeth, p)) {<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> recovered = true;<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> break;<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> }<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> checkIfCancelled(reporter);<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> }<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> }<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> } catch (InterruptedException ie) {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> InterruptedIOException iioe = new InterruptedIOException();<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> iioe.initCause(ie);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> throw iioe;<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> }<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> }<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> return recovered;<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<a name="line.152"></a> |
| <span class="sourceLineNo">153</span><a name="line.153"></a> |
| <span class="sourceLineNo">154</span> private static boolean checkIfTimedout(final Configuration conf, final long recoveryTimeout,<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> final int nbAttempt, final Path p, final long startWaiting) {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> if (recoveryTimeout < EnvironmentEdgeManager.currentTime()) {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> LOG.warn("Cannot recoverLease after trying for "<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> + conf.getInt("hbase.lease.recovery.timeout", 900000)<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> + "ms (hbase.lease.recovery.timeout); continuing, but may be DATALOSS!!!; "<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> + getLogMessageDetail(nbAttempt, p, startWaiting));<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> return true;<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> }<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> return false;<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> /**<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> * Try to recover the lease.<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> * @return True if dfs#recoverLease came by true.<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> */<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> private static boolean recoverLease(final DistributedFileSystem dfs, final int nbAttempt,<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> final Path p, final long startWaiting) throws FileNotFoundException {<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> boolean recovered = false;<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> try {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> recovered = dfs.recoverLease(p);<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> LOG.info((recovered ? "Recovered lease, " : "Failed to recover lease, ")<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> + getLogMessageDetail(nbAttempt, p, startWaiting));<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> } catch (IOException e) {<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> if (e instanceof LeaseExpiredException && e.getMessage().contains("File does not exist")) {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> // This exception comes out instead of FNFE, fix it<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> throw new FileNotFoundException("The given WAL wasn't found at " + p);<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> } else if (e instanceof FileNotFoundException) {<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> throw (FileNotFoundException) e;<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> }<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> LOG.warn(getLogMessageDetail(nbAttempt, p, startWaiting), e);<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> }<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> return recovered;<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> }<a name="line.187"></a> |
| <span class="sourceLineNo">188</span><a name="line.188"></a> |
| <span class="sourceLineNo">189</span> /** Returns Detail to append to any log message around lease recovering. */<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> private static String getLogMessageDetail(final int nbAttempt, final Path p,<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> final long startWaiting) {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> return "attempt=" + nbAttempt + " on file=" + p + " after "<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> + (EnvironmentEdgeManager.currentTime() - startWaiting) + "ms";<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> }<a name="line.194"></a> |
| <span class="sourceLineNo">195</span><a name="line.195"></a> |
| <span class="sourceLineNo">196</span> /**<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> * Call HDFS-4525 isFileClosed if it is available.<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> * @return True if file is closed.<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> */<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> private static boolean isFileClosed(final DistributedFileSystem dfs, final Method m,<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> final Path p) {<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> try {<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> return (Boolean) m.invoke(dfs, p);<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> } catch (SecurityException e) {<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> LOG.warn("No access", e);<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> } catch (Exception e) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> LOG.warn("Failed invocation for " + p.toString(), e);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> }<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> return false;<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> }<a name="line.210"></a> |
| <span class="sourceLineNo">211</span><a name="line.211"></a> |
| <span class="sourceLineNo">212</span> private static void checkIfCancelled(final CancelableProgressable reporter)<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> throws InterruptedIOException {<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> if (reporter == null) {<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> return;<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> }<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> if (!reporter.progress()) {<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> throw new InterruptedIOException("Operation cancelled");<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> }<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> }<a name="line.220"></a> |
| <span class="sourceLineNo">221</span>}<a name="line.221"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
