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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.client;</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 static org.apache.hadoop.hbase.HConstants.DEFAULT_USE_META_REPLICAS;</span> |
| <span class="source-line-no">021</span><span id="line-21">import static org.apache.hadoop.hbase.HConstants.EMPTY_END_ROW;</span> |
| <span class="source-line-no">022</span><span id="line-22">import static org.apache.hadoop.hbase.HConstants.NINES;</span> |
| <span class="source-line-no">023</span><span id="line-23">import static org.apache.hadoop.hbase.HConstants.USE_META_REPLICAS;</span> |
| <span class="source-line-no">024</span><span id="line-24">import static org.apache.hadoop.hbase.HConstants.ZEROES;</span> |
| <span class="source-line-no">025</span><span id="line-25">import static org.apache.hadoop.hbase.TableName.META_TABLE_NAME;</span> |
| <span class="source-line-no">026</span><span id="line-26">import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.createRegionLocations;</span> |
| <span class="source-line-no">027</span><span id="line-27">import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.isGood;</span> |
| <span class="source-line-no">028</span><span id="line-28">import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;</span> |
| <span class="source-line-no">029</span><span id="line-29">import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow;</span> |
| <span class="source-line-no">030</span><span id="line-30">import static org.apache.hadoop.hbase.client.RegionInfo.createRegionName;</span> |
| <span class="source-line-no">031</span><span id="line-31">import static org.apache.hadoop.hbase.client.RegionLocator.LOCATOR_META_REPLICAS_MODE;</span> |
| <span class="source-line-no">032</span><span id="line-32">import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;</span> |
| <span class="source-line-no">033</span><span id="line-33"></span> |
| <span class="source-line-no">034</span><span id="line-34">import java.io.IOException;</span> |
| <span class="source-line-no">035</span><span id="line-35">import java.util.ArrayList;</span> |
| <span class="source-line-no">036</span><span id="line-36">import java.util.Arrays;</span> |
| <span class="source-line-no">037</span><span id="line-37">import java.util.HashSet;</span> |
| <span class="source-line-no">038</span><span id="line-38">import java.util.Iterator;</span> |
| <span class="source-line-no">039</span><span id="line-39">import java.util.LinkedHashMap;</span> |
| <span class="source-line-no">040</span><span id="line-40">import java.util.List;</span> |
| <span class="source-line-no">041</span><span id="line-41">import java.util.Map;</span> |
| <span class="source-line-no">042</span><span id="line-42">import java.util.Optional;</span> |
| <span class="source-line-no">043</span><span id="line-43">import java.util.Set;</span> |
| <span class="source-line-no">044</span><span id="line-44">import java.util.concurrent.CompletableFuture;</span> |
| <span class="source-line-no">045</span><span id="line-45">import java.util.concurrent.ConcurrentHashMap;</span> |
| <span class="source-line-no">046</span><span id="line-46">import java.util.concurrent.ConcurrentMap;</span> |
| <span class="source-line-no">047</span><span id="line-47">import java.util.concurrent.TimeUnit;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.commons.lang3.ObjectUtils;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.hadoop.hbase.CatalogFamilyFormat;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.apache.hadoop.hbase.CatalogReplicaMode;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.apache.hadoop.hbase.HBaseIOException;</span> |
| <span class="source-line-no">052</span><span id="line-52">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">053</span><span id="line-53">import org.apache.hadoop.hbase.HRegionLocation;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.apache.hadoop.hbase.RegionLocations;</span> |
| <span class="source-line-no">055</span><span id="line-55">import org.apache.hadoop.hbase.ServerName;</span> |
| <span class="source-line-no">056</span><span id="line-56">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">057</span><span id="line-57">import org.apache.hadoop.hbase.TableNotFoundException;</span> |
| <span class="source-line-no">058</span><span id="line-58">import org.apache.hadoop.hbase.client.Scan.ReadType;</span> |
| <span class="source-line-no">059</span><span id="line-59">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">060</span><span id="line-60">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">061</span><span id="line-61">import org.slf4j.Logger;</span> |
| <span class="source-line-no">062</span><span id="line-62">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64">/**</span> |
| <span class="source-line-no">065</span><span id="line-65"> * The asynchronous locator for regions other than meta.</span> |
| <span class="source-line-no">066</span><span id="line-66"> */</span> |
| <span class="source-line-no">067</span><span id="line-67">@InterfaceAudience.Private</span> |
| <span class="source-line-no">068</span><span id="line-68">class AsyncNonMetaRegionLocator {</span> |
| <span class="source-line-no">069</span><span id="line-69"></span> |
| <span class="source-line-no">070</span><span id="line-70"> private static final Logger LOG = LoggerFactory.getLogger(AsyncNonMetaRegionLocator.class);</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> static final String MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE =</span> |
| <span class="source-line-no">073</span><span id="line-73"> "hbase.client.meta.max.concurrent.locate.per.table";</span> |
| <span class="source-line-no">074</span><span id="line-74"></span> |
| <span class="source-line-no">075</span><span id="line-75"> private static final int DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE = 8;</span> |
| <span class="source-line-no">076</span><span id="line-76"></span> |
| <span class="source-line-no">077</span><span id="line-77"> static String LOCATE_PREFETCH_LIMIT = "hbase.client.locate.prefetch.limit";</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> private static final int DEFAULT_LOCATE_PREFETCH_LIMIT = 10;</span> |
| <span class="source-line-no">080</span><span id="line-80"></span> |
| <span class="source-line-no">081</span><span id="line-81"> private final AsyncConnectionImpl conn;</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> private final int maxConcurrentLocateRequestPerTable;</span> |
| <span class="source-line-no">084</span><span id="line-84"></span> |
| <span class="source-line-no">085</span><span id="line-85"> private final int locatePrefetchLimit;</span> |
| <span class="source-line-no">086</span><span id="line-86"></span> |
| <span class="source-line-no">087</span><span id="line-87"> // The mode tells if HedgedRead, LoadBalance mode is supported.</span> |
| <span class="source-line-no">088</span><span id="line-88"> // The default mode is CatalogReplicaMode.None.</span> |
| <span class="source-line-no">089</span><span id="line-89"> private CatalogReplicaMode metaReplicaMode;</span> |
| <span class="source-line-no">090</span><span id="line-90"> private CatalogReplicaLoadBalanceSelector metaReplicaSelector;</span> |
| <span class="source-line-no">091</span><span id="line-91"></span> |
| <span class="source-line-no">092</span><span id="line-92"> private final ConcurrentMap<TableName, TableCache> cache = new ConcurrentHashMap<>();</span> |
| <span class="source-line-no">093</span><span id="line-93"></span> |
| <span class="source-line-no">094</span><span id="line-94"> private static final class LocateRequest {</span> |
| <span class="source-line-no">095</span><span id="line-95"></span> |
| <span class="source-line-no">096</span><span id="line-96"> private final byte[] row;</span> |
| <span class="source-line-no">097</span><span id="line-97"></span> |
| <span class="source-line-no">098</span><span id="line-98"> private final RegionLocateType locateType;</span> |
| <span class="source-line-no">099</span><span id="line-99"></span> |
| <span class="source-line-no">100</span><span id="line-100"> public LocateRequest(byte[] row, RegionLocateType locateType) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> this.row = row;</span> |
| <span class="source-line-no">102</span><span id="line-102"> this.locateType = locateType;</span> |
| <span class="source-line-no">103</span><span id="line-103"> }</span> |
| <span class="source-line-no">104</span><span id="line-104"></span> |
| <span class="source-line-no">105</span><span id="line-105"> @Override</span> |
| <span class="source-line-no">106</span><span id="line-106"> public int hashCode() {</span> |
| <span class="source-line-no">107</span><span id="line-107"> return Bytes.hashCode(row) ^ locateType.hashCode();</span> |
| <span class="source-line-no">108</span><span id="line-108"> }</span> |
| <span class="source-line-no">109</span><span id="line-109"></span> |
| <span class="source-line-no">110</span><span id="line-110"> @Override</span> |
| <span class="source-line-no">111</span><span id="line-111"> public boolean equals(Object obj) {</span> |
| <span class="source-line-no">112</span><span id="line-112"> if (obj == null || obj.getClass() != LocateRequest.class) {</span> |
| <span class="source-line-no">113</span><span id="line-113"> return false;</span> |
| <span class="source-line-no">114</span><span id="line-114"> }</span> |
| <span class="source-line-no">115</span><span id="line-115"> LocateRequest that = (LocateRequest) obj;</span> |
| <span class="source-line-no">116</span><span id="line-116"> return locateType.equals(that.locateType) && Bytes.equals(row, that.row);</span> |
| <span class="source-line-no">117</span><span id="line-117"> }</span> |
| <span class="source-line-no">118</span><span id="line-118"> }</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> private static final class RegionLocationsFutureResult {</span> |
| <span class="source-line-no">121</span><span id="line-121"> private final CompletableFuture<RegionLocations> future;</span> |
| <span class="source-line-no">122</span><span id="line-122"> private final RegionLocations result;</span> |
| <span class="source-line-no">123</span><span id="line-123"> private final Throwable e;</span> |
| <span class="source-line-no">124</span><span id="line-124"></span> |
| <span class="source-line-no">125</span><span id="line-125"> public RegionLocationsFutureResult(CompletableFuture<RegionLocations> future,</span> |
| <span class="source-line-no">126</span><span id="line-126"> RegionLocations result, Throwable e) {</span> |
| <span class="source-line-no">127</span><span id="line-127"> this.future = future;</span> |
| <span class="source-line-no">128</span><span id="line-128"> this.result = result;</span> |
| <span class="source-line-no">129</span><span id="line-129"> this.e = e;</span> |
| <span class="source-line-no">130</span><span id="line-130"> }</span> |
| <span class="source-line-no">131</span><span id="line-131"></span> |
| <span class="source-line-no">132</span><span id="line-132"> public void complete() {</span> |
| <span class="source-line-no">133</span><span id="line-133"> if (e != null) {</span> |
| <span class="source-line-no">134</span><span id="line-134"> future.completeExceptionally(e);</span> |
| <span class="source-line-no">135</span><span id="line-135"> }</span> |
| <span class="source-line-no">136</span><span id="line-136"> future.complete(result);</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"> private static final class TableCache {</span> |
| <span class="source-line-no">141</span><span id="line-141"></span> |
| <span class="source-line-no">142</span><span id="line-142"> private final Set<LocateRequest> pendingRequests = new HashSet<>();</span> |
| <span class="source-line-no">143</span><span id="line-143"></span> |
| <span class="source-line-no">144</span><span id="line-144"> private final Map<LocateRequest, CompletableFuture<RegionLocations>> allRequests =</span> |
| <span class="source-line-no">145</span><span id="line-145"> new LinkedHashMap<>();</span> |
| <span class="source-line-no">146</span><span id="line-146"> private final AsyncRegionLocationCache regionLocationCache;</span> |
| <span class="source-line-no">147</span><span id="line-147"></span> |
| <span class="source-line-no">148</span><span id="line-148"> public TableCache(TableName tableName) {</span> |
| <span class="source-line-no">149</span><span id="line-149"> regionLocationCache = new AsyncRegionLocationCache(tableName);</span> |
| <span class="source-line-no">150</span><span id="line-150"> }</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 boolean hasQuota(int max) {</span> |
| <span class="source-line-no">153</span><span id="line-153"> return pendingRequests.size() < max;</span> |
| <span class="source-line-no">154</span><span id="line-154"> }</span> |
| <span class="source-line-no">155</span><span id="line-155"></span> |
| <span class="source-line-no">156</span><span id="line-156"> public boolean isPending(LocateRequest req) {</span> |
| <span class="source-line-no">157</span><span id="line-157"> return pendingRequests.contains(req);</span> |
| <span class="source-line-no">158</span><span id="line-158"> }</span> |
| <span class="source-line-no">159</span><span id="line-159"></span> |
| <span class="source-line-no">160</span><span id="line-160"> public void send(LocateRequest req) {</span> |
| <span class="source-line-no">161</span><span id="line-161"> pendingRequests.add(req);</span> |
| <span class="source-line-no">162</span><span id="line-162"> }</span> |
| <span class="source-line-no">163</span><span id="line-163"></span> |
| <span class="source-line-no">164</span><span id="line-164"> public Optional<LocateRequest> getCandidate() {</span> |
| <span class="source-line-no">165</span><span id="line-165"> return allRequests.keySet().stream().filter(r -> !isPending(r)).findFirst();</span> |
| <span class="source-line-no">166</span><span id="line-166"> }</span> |
| <span class="source-line-no">167</span><span id="line-167"></span> |
| <span class="source-line-no">168</span><span id="line-168"> public List<RegionLocationsFutureResult> clearCompletedRequests(RegionLocations locations) {</span> |
| <span class="source-line-no">169</span><span id="line-169"> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();</span> |
| <span class="source-line-no">170</span><span id="line-170"> for (Iterator<Map.Entry<LocateRequest, CompletableFuture<RegionLocations>>> iter =</span> |
| <span class="source-line-no">171</span><span id="line-171"> allRequests.entrySet().iterator(); iter.hasNext();) {</span> |
| <span class="source-line-no">172</span><span id="line-172"> Map.Entry<LocateRequest, CompletableFuture<RegionLocations>> entry = iter.next();</span> |
| <span class="source-line-no">173</span><span id="line-173"> if (tryComplete(entry.getKey(), entry.getValue(), locations, futureResultList)) {</span> |
| <span class="source-line-no">174</span><span id="line-174"> iter.remove();</span> |
| <span class="source-line-no">175</span><span id="line-175"> }</span> |
| <span class="source-line-no">176</span><span id="line-176"> }</span> |
| <span class="source-line-no">177</span><span id="line-177"> return futureResultList;</span> |
| <span class="source-line-no">178</span><span id="line-178"> }</span> |
| <span class="source-line-no">179</span><span id="line-179"></span> |
| <span class="source-line-no">180</span><span id="line-180"> private boolean tryComplete(LocateRequest req, CompletableFuture<RegionLocations> future,</span> |
| <span class="source-line-no">181</span><span id="line-181"> RegionLocations locations, List<RegionLocationsFutureResult> futureResultList) {</span> |
| <span class="source-line-no">182</span><span id="line-182"> if (future.isDone()) {</span> |
| <span class="source-line-no">183</span><span id="line-183"> return true;</span> |
| <span class="source-line-no">184</span><span id="line-184"> }</span> |
| <span class="source-line-no">185</span><span id="line-185"> if (locations == null) {</span> |
| <span class="source-line-no">186</span><span id="line-186"> return false;</span> |
| <span class="source-line-no">187</span><span id="line-187"> }</span> |
| <span class="source-line-no">188</span><span id="line-188"> HRegionLocation loc = ObjectUtils.firstNonNull(locations.getRegionLocations());</span> |
| <span class="source-line-no">189</span><span id="line-189"> // we should at least have one location available, otherwise the request should fail and</span> |
| <span class="source-line-no">190</span><span id="line-190"> // should not arrive here</span> |
| <span class="source-line-no">191</span><span id="line-191"> assert loc != null;</span> |
| <span class="source-line-no">192</span><span id="line-192"> boolean completed;</span> |
| <span class="source-line-no">193</span><span id="line-193"> if (req.locateType.equals(RegionLocateType.BEFORE)) {</span> |
| <span class="source-line-no">194</span><span id="line-194"> // for locating the row before current row, the common case is to find the previous region</span> |
| <span class="source-line-no">195</span><span id="line-195"> // in reverse scan, so we check the endKey first. In general, the condition should be</span> |
| <span class="source-line-no">196</span><span id="line-196"> // startKey < req.row and endKey >= req.row. Here we split it to endKey == req.row ||</span> |
| <span class="source-line-no">197</span><span id="line-197"> // (endKey > req.row && startKey < req.row). The two conditions are equal since startKey <</span> |
| <span class="source-line-no">198</span><span id="line-198"> // endKey.</span> |
| <span class="source-line-no">199</span><span id="line-199"> byte[] endKey = loc.getRegion().getEndKey();</span> |
| <span class="source-line-no">200</span><span id="line-200"> int c = Bytes.compareTo(endKey, req.row);</span> |
| <span class="source-line-no">201</span><span id="line-201"> completed = c == 0 || ((c > 0 || Bytes.equals(EMPTY_END_ROW, endKey))</span> |
| <span class="source-line-no">202</span><span id="line-202"> && Bytes.compareTo(loc.getRegion().getStartKey(), req.row) < 0);</span> |
| <span class="source-line-no">203</span><span id="line-203"> } else {</span> |
| <span class="source-line-no">204</span><span id="line-204"> completed = loc.getRegion().containsRow(req.row);</span> |
| <span class="source-line-no">205</span><span id="line-205"> }</span> |
| <span class="source-line-no">206</span><span id="line-206"> if (completed) {</span> |
| <span class="source-line-no">207</span><span id="line-207"> futureResultList.add(new RegionLocationsFutureResult(future, locations, null));</span> |
| <span class="source-line-no">208</span><span id="line-208"> return true;</span> |
| <span class="source-line-no">209</span><span id="line-209"> } else {</span> |
| <span class="source-line-no">210</span><span id="line-210"> return false;</span> |
| <span class="source-line-no">211</span><span id="line-211"> }</span> |
| <span class="source-line-no">212</span><span id="line-212"> }</span> |
| <span class="source-line-no">213</span><span id="line-213"> }</span> |
| <span class="source-line-no">214</span><span id="line-214"></span> |
| <span class="source-line-no">215</span><span id="line-215"> AsyncNonMetaRegionLocator(AsyncConnectionImpl conn) {</span> |
| <span class="source-line-no">216</span><span id="line-216"> this.conn = conn;</span> |
| <span class="source-line-no">217</span><span id="line-217"> this.maxConcurrentLocateRequestPerTable = conn.getConfiguration().getInt(</span> |
| <span class="source-line-no">218</span><span id="line-218"> MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE, DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE);</span> |
| <span class="source-line-no">219</span><span id="line-219"> this.locatePrefetchLimit =</span> |
| <span class="source-line-no">220</span><span id="line-220"> conn.getConfiguration().getInt(LOCATE_PREFETCH_LIMIT, DEFAULT_LOCATE_PREFETCH_LIMIT);</span> |
| <span class="source-line-no">221</span><span id="line-221"></span> |
| <span class="source-line-no">222</span><span id="line-222"> // Get the region locator's meta replica mode.</span> |
| <span class="source-line-no">223</span><span id="line-223"> this.metaReplicaMode = CatalogReplicaMode.fromString(</span> |
| <span class="source-line-no">224</span><span id="line-224"> conn.getConfiguration().get(LOCATOR_META_REPLICAS_MODE, CatalogReplicaMode.NONE.toString()));</span> |
| <span class="source-line-no">225</span><span id="line-225"></span> |
| <span class="source-line-no">226</span><span id="line-226"> switch (this.metaReplicaMode) {</span> |
| <span class="source-line-no">227</span><span id="line-227"> case LOAD_BALANCE:</span> |
| <span class="source-line-no">228</span><span id="line-228"> String replicaSelectorClass =</span> |
| <span class="source-line-no">229</span><span id="line-229"> conn.getConfiguration().get(RegionLocator.LOCATOR_META_REPLICAS_MODE_LOADBALANCE_SELECTOR,</span> |
| <span class="source-line-no">230</span><span id="line-230"> CatalogReplicaLoadBalanceSimpleSelector.class.getName());</span> |
| <span class="source-line-no">231</span><span id="line-231"></span> |
| <span class="source-line-no">232</span><span id="line-232"> this.metaReplicaSelector = CatalogReplicaLoadBalanceSelectorFactory</span> |
| <span class="source-line-no">233</span><span id="line-233"> .createSelector(replicaSelectorClass, META_TABLE_NAME, conn, () -> {</span> |
| <span class="source-line-no">234</span><span id="line-234"> int numOfReplicas = CatalogReplicaLoadBalanceSelector.UNINITIALIZED_NUM_OF_REPLICAS;</span> |
| <span class="source-line-no">235</span><span id="line-235"> try {</span> |
| <span class="source-line-no">236</span><span id="line-236"> RegionLocations metaLocations = conn.registry.getMetaRegionLocations()</span> |
| <span class="source-line-no">237</span><span id="line-237"> .get(conn.connConf.getReadRpcTimeoutNs(), TimeUnit.NANOSECONDS);</span> |
| <span class="source-line-no">238</span><span id="line-238"> numOfReplicas = metaLocations.size();</span> |
| <span class="source-line-no">239</span><span id="line-239"> } catch (Exception e) {</span> |
| <span class="source-line-no">240</span><span id="line-240"> LOG.error("Failed to get table {}'s region replication, ", META_TABLE_NAME, e);</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 numOfReplicas;</span> |
| <span class="source-line-no">243</span><span id="line-243"> });</span> |
| <span class="source-line-no">244</span><span id="line-244"> break;</span> |
| <span class="source-line-no">245</span><span id="line-245"> case NONE:</span> |
| <span class="source-line-no">246</span><span id="line-246"> // If user does not configure LOCATOR_META_REPLICAS_MODE, let's check the legacy config.</span> |
| <span class="source-line-no">247</span><span id="line-247"> boolean useMetaReplicas =</span> |
| <span class="source-line-no">248</span><span id="line-248"> conn.getConfiguration().getBoolean(USE_META_REPLICAS, DEFAULT_USE_META_REPLICAS);</span> |
| <span class="source-line-no">249</span><span id="line-249"> if (useMetaReplicas) {</span> |
| <span class="source-line-no">250</span><span id="line-250"> this.metaReplicaMode = CatalogReplicaMode.HEDGED_READ;</span> |
| <span class="source-line-no">251</span><span id="line-251"> }</span> |
| <span class="source-line-no">252</span><span id="line-252"> break;</span> |
| <span class="source-line-no">253</span><span id="line-253"> default:</span> |
| <span class="source-line-no">254</span><span id="line-254"> // Doing nothing</span> |
| <span class="source-line-no">255</span><span id="line-255"> }</span> |
| <span class="source-line-no">256</span><span id="line-256"> }</span> |
| <span class="source-line-no">257</span><span id="line-257"></span> |
| <span class="source-line-no">258</span><span id="line-258"> private TableCache getTableCache(TableName tableName) {</span> |
| <span class="source-line-no">259</span><span id="line-259"> return computeIfAbsent(cache, tableName, () -> new TableCache(tableName));</span> |
| <span class="source-line-no">260</span><span id="line-260"> }</span> |
| <span class="source-line-no">261</span><span id="line-261"></span> |
| <span class="source-line-no">262</span><span id="line-262"> private void complete(TableName tableName, LocateRequest req, RegionLocations locs,</span> |
| <span class="source-line-no">263</span><span id="line-263"> Throwable error) {</span> |
| <span class="source-line-no">264</span><span id="line-264"> if (error != null) {</span> |
| <span class="source-line-no">265</span><span id="line-265"> LOG.warn("Failed to locate region in '" + tableName + "', row='"</span> |
| <span class="source-line-no">266</span><span id="line-266"> + Bytes.toStringBinary(req.row) + "', locateType=" + req.locateType, error);</span> |
| <span class="source-line-no">267</span><span id="line-267"> }</span> |
| <span class="source-line-no">268</span><span id="line-268"> Optional<LocateRequest> toSend = Optional.empty();</span> |
| <span class="source-line-no">269</span><span id="line-269"> TableCache tableCache = getTableCache(tableName);</span> |
| <span class="source-line-no">270</span><span id="line-270"> if (locs != null) {</span> |
| <span class="source-line-no">271</span><span id="line-271"> RegionLocations addedLocs = tableCache.regionLocationCache.add(locs);</span> |
| <span class="source-line-no">272</span><span id="line-272"> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();</span> |
| <span class="source-line-no">273</span><span id="line-273"> synchronized (tableCache) {</span> |
| <span class="source-line-no">274</span><span id="line-274"> tableCache.pendingRequests.remove(req);</span> |
| <span class="source-line-no">275</span><span id="line-275"> futureResultList.addAll(tableCache.clearCompletedRequests(addedLocs));</span> |
| <span class="source-line-no">276</span><span id="line-276"> // Remove a complete locate request in a synchronized block, so the table cache must have</span> |
| <span class="source-line-no">277</span><span id="line-277"> // quota to send a candidate request.</span> |
| <span class="source-line-no">278</span><span id="line-278"> toSend = tableCache.getCandidate();</span> |
| <span class="source-line-no">279</span><span id="line-279"> toSend.ifPresent(r -> tableCache.send(r));</span> |
| <span class="source-line-no">280</span><span id="line-280"> }</span> |
| <span class="source-line-no">281</span><span id="line-281"> futureResultList.forEach(RegionLocationsFutureResult::complete);</span> |
| <span class="source-line-no">282</span><span id="line-282"> toSend.ifPresent(r -> locateInMeta(tableName, r));</span> |
| <span class="source-line-no">283</span><span id="line-283"> } else {</span> |
| <span class="source-line-no">284</span><span id="line-284"> // we meet an error</span> |
| <span class="source-line-no">285</span><span id="line-285"> assert error != null;</span> |
| <span class="source-line-no">286</span><span id="line-286"> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();</span> |
| <span class="source-line-no">287</span><span id="line-287"> synchronized (tableCache) {</span> |
| <span class="source-line-no">288</span><span id="line-288"> tableCache.pendingRequests.remove(req);</span> |
| <span class="source-line-no">289</span><span id="line-289"> // fail the request itself, no matter whether it is a DoNotRetryIOException, as we have</span> |
| <span class="source-line-no">290</span><span id="line-290"> // already retried several times</span> |
| <span class="source-line-no">291</span><span id="line-291"> CompletableFuture<RegionLocations> future = tableCache.allRequests.remove(req);</span> |
| <span class="source-line-no">292</span><span id="line-292"> if (future != null) {</span> |
| <span class="source-line-no">293</span><span id="line-293"> futureResultList.add(new RegionLocationsFutureResult(future, null, error));</span> |
| <span class="source-line-no">294</span><span id="line-294"> }</span> |
| <span class="source-line-no">295</span><span id="line-295"> futureResultList.addAll(tableCache.clearCompletedRequests(null));</span> |
| <span class="source-line-no">296</span><span id="line-296"> // Remove a complete locate request in a synchronized block, so the table cache must have</span> |
| <span class="source-line-no">297</span><span id="line-297"> // quota to send a candidate request.</span> |
| <span class="source-line-no">298</span><span id="line-298"> toSend = tableCache.getCandidate();</span> |
| <span class="source-line-no">299</span><span id="line-299"> toSend.ifPresent(r -> tableCache.send(r));</span> |
| <span class="source-line-no">300</span><span id="line-300"> }</span> |
| <span class="source-line-no">301</span><span id="line-301"> futureResultList.forEach(RegionLocationsFutureResult::complete);</span> |
| <span class="source-line-no">302</span><span id="line-302"> toSend.ifPresent(r -> locateInMeta(tableName, r));</span> |
| <span class="source-line-no">303</span><span id="line-303"> }</span> |
| <span class="source-line-no">304</span><span id="line-304"> }</span> |
| <span class="source-line-no">305</span><span id="line-305"></span> |
| <span class="source-line-no">306</span><span id="line-306"> // return whether we should stop the scan</span> |
| <span class="source-line-no">307</span><span id="line-307"> private boolean onScanNext(TableName tableName, LocateRequest req, Result result) {</span> |
| <span class="source-line-no">308</span><span id="line-308"> RegionLocations locs = CatalogFamilyFormat.getRegionLocations(result);</span> |
| <span class="source-line-no">309</span><span id="line-309"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">310</span><span id="line-310"> LOG.debug("The fetched location of '{}', row='{}', locateType={} is {}", tableName,</span> |
| <span class="source-line-no">311</span><span id="line-311"> Bytes.toStringBinary(req.row), req.locateType, locs);</span> |
| <span class="source-line-no">312</span><span id="line-312"> }</span> |
| <span class="source-line-no">313</span><span id="line-313"> // remove HRegionLocation with null location, i.e, getServerName returns null.</span> |
| <span class="source-line-no">314</span><span id="line-314"> if (locs != null) {</span> |
| <span class="source-line-no">315</span><span id="line-315"> locs = locs.removeElementsWithNullLocation();</span> |
| <span class="source-line-no">316</span><span id="line-316"> }</span> |
| <span class="source-line-no">317</span><span id="line-317"></span> |
| <span class="source-line-no">318</span><span id="line-318"> // the default region location should always be presented when fetching from meta, otherwise</span> |
| <span class="source-line-no">319</span><span id="line-319"> // let's fail the request.</span> |
| <span class="source-line-no">320</span><span id="line-320"> if (locs == null || locs.getDefaultRegionLocation() == null) {</span> |
| <span class="source-line-no">321</span><span id="line-321"> complete(tableName, req, null,</span> |
| <span class="source-line-no">322</span><span id="line-322"> new HBaseIOException(String.format("No location found for '%s', row='%s', locateType=%s",</span> |
| <span class="source-line-no">323</span><span id="line-323"> tableName, Bytes.toStringBinary(req.row), req.locateType)));</span> |
| <span class="source-line-no">324</span><span id="line-324"> return true;</span> |
| <span class="source-line-no">325</span><span id="line-325"> }</span> |
| <span class="source-line-no">326</span><span id="line-326"> HRegionLocation loc = locs.getDefaultRegionLocation();</span> |
| <span class="source-line-no">327</span><span id="line-327"> RegionInfo info = loc.getRegion();</span> |
| <span class="source-line-no">328</span><span id="line-328"> if (info == null) {</span> |
| <span class="source-line-no">329</span><span id="line-329"> complete(tableName, req, null,</span> |
| <span class="source-line-no">330</span><span id="line-330"> new HBaseIOException(String.format("HRegionInfo is null for '%s', row='%s', locateType=%s",</span> |
| <span class="source-line-no">331</span><span id="line-331"> tableName, Bytes.toStringBinary(req.row), req.locateType)));</span> |
| <span class="source-line-no">332</span><span id="line-332"> return true;</span> |
| <span class="source-line-no">333</span><span id="line-333"> }</span> |
| <span class="source-line-no">334</span><span id="line-334"> if (info.isSplitParent()) {</span> |
| <span class="source-line-no">335</span><span id="line-335"> return false;</span> |
| <span class="source-line-no">336</span><span id="line-336"> }</span> |
| <span class="source-line-no">337</span><span id="line-337"> complete(tableName, req, locs, null);</span> |
| <span class="source-line-no">338</span><span id="line-338"> return true;</span> |
| <span class="source-line-no">339</span><span id="line-339"> }</span> |
| <span class="source-line-no">340</span><span id="line-340"></span> |
| <span class="source-line-no">341</span><span id="line-341"> private void recordCacheHit() {</span> |
| <span class="source-line-no">342</span><span id="line-342"> conn.getConnectionMetrics().ifPresent(MetricsConnection::incrMetaCacheHit);</span> |
| <span class="source-line-no">343</span><span id="line-343"> }</span> |
| <span class="source-line-no">344</span><span id="line-344"></span> |
| <span class="source-line-no">345</span><span id="line-345"> private void recordCacheMiss() {</span> |
| <span class="source-line-no">346</span><span id="line-346"> conn.getConnectionMetrics().ifPresent(MetricsConnection::incrMetaCacheMiss);</span> |
| <span class="source-line-no">347</span><span id="line-347"> }</span> |
| <span class="source-line-no">348</span><span id="line-348"></span> |
| <span class="source-line-no">349</span><span id="line-349"> private RegionLocations locateRowInCache(TableCache tableCache, byte[] row, int replicaId) {</span> |
| <span class="source-line-no">350</span><span id="line-350"> RegionLocations locs = tableCache.regionLocationCache.findForRow(row, replicaId);</span> |
| <span class="source-line-no">351</span><span id="line-351"> if (locs == null) {</span> |
| <span class="source-line-no">352</span><span id="line-352"> recordCacheMiss();</span> |
| <span class="source-line-no">353</span><span id="line-353"> } else {</span> |
| <span class="source-line-no">354</span><span id="line-354"> recordCacheHit();</span> |
| <span class="source-line-no">355</span><span id="line-355"> }</span> |
| <span class="source-line-no">356</span><span id="line-356"> return locs;</span> |
| <span class="source-line-no">357</span><span id="line-357"> }</span> |
| <span class="source-line-no">358</span><span id="line-358"></span> |
| <span class="source-line-no">359</span><span id="line-359"> private RegionLocations locateRowBeforeInCache(TableCache tableCache, byte[] row, int replicaId) {</span> |
| <span class="source-line-no">360</span><span id="line-360"> RegionLocations locs = tableCache.regionLocationCache.findForBeforeRow(row, replicaId);</span> |
| <span class="source-line-no">361</span><span id="line-361"> if (locs == null) {</span> |
| <span class="source-line-no">362</span><span id="line-362"> recordCacheMiss();</span> |
| <span class="source-line-no">363</span><span id="line-363"> } else {</span> |
| <span class="source-line-no">364</span><span id="line-364"> recordCacheHit();</span> |
| <span class="source-line-no">365</span><span id="line-365"> }</span> |
| <span class="source-line-no">366</span><span id="line-366"> return locs;</span> |
| <span class="source-line-no">367</span><span id="line-367"> }</span> |
| <span class="source-line-no">368</span><span id="line-368"></span> |
| <span class="source-line-no">369</span><span id="line-369"> private void locateInMeta(TableName tableName, LocateRequest req) {</span> |
| <span class="source-line-no">370</span><span id="line-370"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">371</span><span id="line-371"> LOG.trace("Try locate '" + tableName + "', row='" + Bytes.toStringBinary(req.row)</span> |
| <span class="source-line-no">372</span><span id="line-372"> + "', locateType=" + req.locateType + " in meta");</span> |
| <span class="source-line-no">373</span><span id="line-373"> }</span> |
| <span class="source-line-no">374</span><span id="line-374"> byte[] metaStartKey;</span> |
| <span class="source-line-no">375</span><span id="line-375"> if (req.locateType.equals(RegionLocateType.BEFORE)) {</span> |
| <span class="source-line-no">376</span><span id="line-376"> if (isEmptyStopRow(req.row)) {</span> |
| <span class="source-line-no">377</span><span id="line-377"> byte[] binaryTableName = tableName.getName();</span> |
| <span class="source-line-no">378</span><span id="line-378"> metaStartKey = Arrays.copyOf(binaryTableName, binaryTableName.length + 1);</span> |
| <span class="source-line-no">379</span><span id="line-379"> } else {</span> |
| <span class="source-line-no">380</span><span id="line-380"> metaStartKey = createRegionName(tableName, req.row, ZEROES, false);</span> |
| <span class="source-line-no">381</span><span id="line-381"> }</span> |
| <span class="source-line-no">382</span><span id="line-382"> } else {</span> |
| <span class="source-line-no">383</span><span id="line-383"> metaStartKey = createRegionName(tableName, req.row, NINES, false);</span> |
| <span class="source-line-no">384</span><span id="line-384"> }</span> |
| <span class="source-line-no">385</span><span id="line-385"> byte[] metaStopKey =</span> |
| <span class="source-line-no">386</span><span id="line-386"> RegionInfo.createRegionName(tableName, HConstants.EMPTY_START_ROW, "", false);</span> |
| <span class="source-line-no">387</span><span id="line-387"> Scan scan = new Scan().withStartRow(metaStartKey).withStopRow(metaStopKey, true)</span> |
| <span class="source-line-no">388</span><span id="line-388"> .addFamily(HConstants.CATALOG_FAMILY).setReversed(true).setCaching(locatePrefetchLimit)</span> |
| <span class="source-line-no">389</span><span id="line-389"> .setReadType(ReadType.PREAD);</span> |
| <span class="source-line-no">390</span><span id="line-390"></span> |
| <span class="source-line-no">391</span><span id="line-391"> switch (this.metaReplicaMode) {</span> |
| <span class="source-line-no">392</span><span id="line-392"> case LOAD_BALANCE:</span> |
| <span class="source-line-no">393</span><span id="line-393"> int metaReplicaId = this.metaReplicaSelector.select(tableName, req.row, req.locateType);</span> |
| <span class="source-line-no">394</span><span id="line-394"> if (metaReplicaId != RegionInfo.DEFAULT_REPLICA_ID) {</span> |
| <span class="source-line-no">395</span><span id="line-395"> // If the selector gives a non-primary meta replica region, then go with it.</span> |
| <span class="source-line-no">396</span><span id="line-396"> // Otherwise, just go to primary in non-hedgedRead mode.</span> |
| <span class="source-line-no">397</span><span id="line-397"> scan.setConsistency(Consistency.TIMELINE);</span> |
| <span class="source-line-no">398</span><span id="line-398"> scan.setReplicaId(metaReplicaId);</span> |
| <span class="source-line-no">399</span><span id="line-399"> }</span> |
| <span class="source-line-no">400</span><span id="line-400"> break;</span> |
| <span class="source-line-no">401</span><span id="line-401"> case HEDGED_READ:</span> |
| <span class="source-line-no">402</span><span id="line-402"> scan.setConsistency(Consistency.TIMELINE);</span> |
| <span class="source-line-no">403</span><span id="line-403"> break;</span> |
| <span class="source-line-no">404</span><span id="line-404"> default:</span> |
| <span class="source-line-no">405</span><span id="line-405"> // do nothing</span> |
| <span class="source-line-no">406</span><span id="line-406"> }</span> |
| <span class="source-line-no">407</span><span id="line-407"></span> |
| <span class="source-line-no">408</span><span id="line-408"> conn.getTable(META_TABLE_NAME).scan(scan, new AdvancedScanResultConsumer() {</span> |
| <span class="source-line-no">409</span><span id="line-409"></span> |
| <span class="source-line-no">410</span><span id="line-410"> private boolean completeNormally = false;</span> |
| <span class="source-line-no">411</span><span id="line-411"></span> |
| <span class="source-line-no">412</span><span id="line-412"> private boolean tableNotFound = true;</span> |
| <span class="source-line-no">413</span><span id="line-413"></span> |
| <span class="source-line-no">414</span><span id="line-414"> @Override</span> |
| <span class="source-line-no">415</span><span id="line-415"> public void onError(Throwable error) {</span> |
| <span class="source-line-no">416</span><span id="line-416"> complete(tableName, req, null, error);</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"> @Override</span> |
| <span class="source-line-no">420</span><span id="line-420"> public void onComplete() {</span> |
| <span class="source-line-no">421</span><span id="line-421"> if (tableNotFound) {</span> |
| <span class="source-line-no">422</span><span id="line-422"> complete(tableName, req, null, new TableNotFoundException(tableName));</span> |
| <span class="source-line-no">423</span><span id="line-423"> } else if (!completeNormally) {</span> |
| <span class="source-line-no">424</span><span id="line-424"> complete(tableName, req, null, new IOException(</span> |
| <span class="source-line-no">425</span><span id="line-425"> "Unable to find region for '" + Bytes.toStringBinary(req.row) + "' in " + tableName));</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"></span> |
| <span class="source-line-no">429</span><span id="line-429"> @Override</span> |
| <span class="source-line-no">430</span><span id="line-430"> public void onNext(Result[] results, ScanController controller) {</span> |
| <span class="source-line-no">431</span><span id="line-431"> if (results.length == 0) {</span> |
| <span class="source-line-no">432</span><span id="line-432"> return;</span> |
| <span class="source-line-no">433</span><span id="line-433"> }</span> |
| <span class="source-line-no">434</span><span id="line-434"> tableNotFound = false;</span> |
| <span class="source-line-no">435</span><span id="line-435"> int i = 0;</span> |
| <span class="source-line-no">436</span><span id="line-436"> for (; i < results.length; i++) {</span> |
| <span class="source-line-no">437</span><span id="line-437"> if (onScanNext(tableName, req, results[i])) {</span> |
| <span class="source-line-no">438</span><span id="line-438"> completeNormally = true;</span> |
| <span class="source-line-no">439</span><span id="line-439"> controller.terminate();</span> |
| <span class="source-line-no">440</span><span id="line-440"> i++;</span> |
| <span class="source-line-no">441</span><span id="line-441"> break;</span> |
| <span class="source-line-no">442</span><span id="line-442"> }</span> |
| <span class="source-line-no">443</span><span id="line-443"> }</span> |
| <span class="source-line-no">444</span><span id="line-444"> // Add the remaining results into cache</span> |
| <span class="source-line-no">445</span><span id="line-445"> if (i < results.length) {</span> |
| <span class="source-line-no">446</span><span id="line-446"> TableCache tableCache = getTableCache(tableName);</span> |
| <span class="source-line-no">447</span><span id="line-447"> for (; i < results.length; i++) {</span> |
| <span class="source-line-no">448</span><span id="line-448"> RegionLocations locs = CatalogFamilyFormat.getRegionLocations(results[i]);</span> |
| <span class="source-line-no">449</span><span id="line-449"> if (locs == null) {</span> |
| <span class="source-line-no">450</span><span id="line-450"> continue;</span> |
| <span class="source-line-no">451</span><span id="line-451"> }</span> |
| <span class="source-line-no">452</span><span id="line-452"> HRegionLocation loc = locs.getDefaultRegionLocation();</span> |
| <span class="source-line-no">453</span><span id="line-453"> if (loc == null) {</span> |
| <span class="source-line-no">454</span><span id="line-454"> continue;</span> |
| <span class="source-line-no">455</span><span id="line-455"> }</span> |
| <span class="source-line-no">456</span><span id="line-456"> RegionInfo info = loc.getRegion();</span> |
| <span class="source-line-no">457</span><span id="line-457"> if (info == null || info.isOffline() || info.isSplitParent()) {</span> |
| <span class="source-line-no">458</span><span id="line-458"> continue;</span> |
| <span class="source-line-no">459</span><span id="line-459"> }</span> |
| <span class="source-line-no">460</span><span id="line-460"> RegionLocations addedLocs = tableCache.regionLocationCache.add(locs);</span> |
| <span class="source-line-no">461</span><span id="line-461"> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();</span> |
| <span class="source-line-no">462</span><span id="line-462"> synchronized (tableCache) {</span> |
| <span class="source-line-no">463</span><span id="line-463"> futureResultList.addAll(tableCache.clearCompletedRequests(addedLocs));</span> |
| <span class="source-line-no">464</span><span id="line-464"> }</span> |
| <span class="source-line-no">465</span><span id="line-465"> futureResultList.forEach(RegionLocationsFutureResult::complete);</span> |
| <span class="source-line-no">466</span><span id="line-466"> }</span> |
| <span class="source-line-no">467</span><span id="line-467"> }</span> |
| <span class="source-line-no">468</span><span id="line-468"> }</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"> private RegionLocations locateInCache(TableCache tableCache, byte[] row, int replicaId,</span> |
| <span class="source-line-no">473</span><span id="line-473"> RegionLocateType locateType) {</span> |
| <span class="source-line-no">474</span><span id="line-474"> return locateType.equals(RegionLocateType.BEFORE)</span> |
| <span class="source-line-no">475</span><span id="line-475"> ? locateRowBeforeInCache(tableCache, row, replicaId)</span> |
| <span class="source-line-no">476</span><span id="line-476"> : locateRowInCache(tableCache, row, replicaId);</span> |
| <span class="source-line-no">477</span><span id="line-477"> }</span> |
| <span class="source-line-no">478</span><span id="line-478"></span> |
| <span class="source-line-no">479</span><span id="line-479"> // locateToPrevious is true means we will use the start key of a region to locate the region</span> |
| <span class="source-line-no">480</span><span id="line-480"> // placed before it. Used for reverse scan. See the comment of</span> |
| <span class="source-line-no">481</span><span id="line-481"> // AsyncRegionLocator.getPreviousRegionLocation.</span> |
| <span class="source-line-no">482</span><span id="line-482"> private CompletableFuture<RegionLocations> getRegionLocationsInternal(TableName tableName,</span> |
| <span class="source-line-no">483</span><span id="line-483"> byte[] row, int replicaId, RegionLocateType locateType, boolean reload) {</span> |
| <span class="source-line-no">484</span><span id="line-484"> // AFTER should be convert to CURRENT before calling this method</span> |
| <span class="source-line-no">485</span><span id="line-485"> assert !locateType.equals(RegionLocateType.AFTER);</span> |
| <span class="source-line-no">486</span><span id="line-486"> TableCache tableCache = getTableCache(tableName);</span> |
| <span class="source-line-no">487</span><span id="line-487"> if (!reload) {</span> |
| <span class="source-line-no">488</span><span id="line-488"> RegionLocations locs = locateInCache(tableCache, row, replicaId, locateType);</span> |
| <span class="source-line-no">489</span><span id="line-489"> if (isGood(locs, replicaId)) {</span> |
| <span class="source-line-no">490</span><span id="line-490"> return CompletableFuture.completedFuture(locs);</span> |
| <span class="source-line-no">491</span><span id="line-491"> }</span> |
| <span class="source-line-no">492</span><span id="line-492"> }</span> |
| <span class="source-line-no">493</span><span id="line-493"> CompletableFuture<RegionLocations> future;</span> |
| <span class="source-line-no">494</span><span id="line-494"> LocateRequest req;</span> |
| <span class="source-line-no">495</span><span id="line-495"> boolean sendRequest = false;</span> |
| <span class="source-line-no">496</span><span id="line-496"> synchronized (tableCache) {</span> |
| <span class="source-line-no">497</span><span id="line-497"> // check again</span> |
| <span class="source-line-no">498</span><span id="line-498"> if (!reload) {</span> |
| <span class="source-line-no">499</span><span id="line-499"> RegionLocations locs = locateInCache(tableCache, row, replicaId, locateType);</span> |
| <span class="source-line-no">500</span><span id="line-500"> if (isGood(locs, replicaId)) {</span> |
| <span class="source-line-no">501</span><span id="line-501"> return CompletableFuture.completedFuture(locs);</span> |
| <span class="source-line-no">502</span><span id="line-502"> }</span> |
| <span class="source-line-no">503</span><span id="line-503"> }</span> |
| <span class="source-line-no">504</span><span id="line-504"> req = new LocateRequest(row, locateType);</span> |
| <span class="source-line-no">505</span><span id="line-505"> future = tableCache.allRequests.get(req);</span> |
| <span class="source-line-no">506</span><span id="line-506"> if (future == null) {</span> |
| <span class="source-line-no">507</span><span id="line-507"> future = new CompletableFuture<>();</span> |
| <span class="source-line-no">508</span><span id="line-508"> tableCache.allRequests.put(req, future);</span> |
| <span class="source-line-no">509</span><span id="line-509"> if (tableCache.hasQuota(maxConcurrentLocateRequestPerTable) && !tableCache.isPending(req)) {</span> |
| <span class="source-line-no">510</span><span id="line-510"> tableCache.send(req);</span> |
| <span class="source-line-no">511</span><span id="line-511"> sendRequest = true;</span> |
| <span class="source-line-no">512</span><span id="line-512"> }</span> |
| <span class="source-line-no">513</span><span id="line-513"> }</span> |
| <span class="source-line-no">514</span><span id="line-514"> }</span> |
| <span class="source-line-no">515</span><span id="line-515"> if (sendRequest) {</span> |
| <span class="source-line-no">516</span><span id="line-516"> locateInMeta(tableName, req);</span> |
| <span class="source-line-no">517</span><span id="line-517"> }</span> |
| <span class="source-line-no">518</span><span id="line-518"> return future;</span> |
| <span class="source-line-no">519</span><span id="line-519"> }</span> |
| <span class="source-line-no">520</span><span id="line-520"></span> |
| <span class="source-line-no">521</span><span id="line-521"> CompletableFuture<RegionLocations> getRegionLocations(TableName tableName, byte[] row,</span> |
| <span class="source-line-no">522</span><span id="line-522"> int replicaId, RegionLocateType locateType, boolean reload) {</span> |
| <span class="source-line-no">523</span><span id="line-523"> // as we know the exact row after us, so we can just create the new row, and use the same</span> |
| <span class="source-line-no">524</span><span id="line-524"> // algorithm to locate it.</span> |
| <span class="source-line-no">525</span><span id="line-525"> if (locateType.equals(RegionLocateType.AFTER)) {</span> |
| <span class="source-line-no">526</span><span id="line-526"> row = createClosestRowAfter(row);</span> |
| <span class="source-line-no">527</span><span id="line-527"> locateType = RegionLocateType.CURRENT;</span> |
| <span class="source-line-no">528</span><span id="line-528"> }</span> |
| <span class="source-line-no">529</span><span id="line-529"> return getRegionLocationsInternal(tableName, row, replicaId, locateType, reload);</span> |
| <span class="source-line-no">530</span><span id="line-530"> }</span> |
| <span class="source-line-no">531</span><span id="line-531"></span> |
| <span class="source-line-no">532</span><span id="line-532"> private void recordClearRegionCache() {</span> |
| <span class="source-line-no">533</span><span id="line-533"> conn.getConnectionMetrics().ifPresent(MetricsConnection::incrMetaCacheNumClearRegion);</span> |
| <span class="source-line-no">534</span><span id="line-534"> }</span> |
| <span class="source-line-no">535</span><span id="line-535"></span> |
| <span class="source-line-no">536</span><span id="line-536"> private void removeLocationFromCache(HRegionLocation loc) {</span> |
| <span class="source-line-no">537</span><span id="line-537"> TableCache tableCache = cache.get(loc.getRegion().getTable());</span> |
| <span class="source-line-no">538</span><span id="line-538"> if (tableCache != null) {</span> |
| <span class="source-line-no">539</span><span id="line-539"> if (tableCache.regionLocationCache.remove(loc)) {</span> |
| <span class="source-line-no">540</span><span id="line-540"> recordClearRegionCache();</span> |
| <span class="source-line-no">541</span><span id="line-541"> updateMetaReplicaSelector(loc);</span> |
| <span class="source-line-no">542</span><span id="line-542"> }</span> |
| <span class="source-line-no">543</span><span id="line-543"> }</span> |
| <span class="source-line-no">544</span><span id="line-544"> }</span> |
| <span class="source-line-no">545</span><span id="line-545"></span> |
| <span class="source-line-no">546</span><span id="line-546"> private void updateMetaReplicaSelector(HRegionLocation loc) {</span> |
| <span class="source-line-no">547</span><span id="line-547"> // Tell metaReplicaSelector that the location is stale. It will create a stale entry</span> |
| <span class="source-line-no">548</span><span id="line-548"> // with timestamp internally. Next time the client looks up the same location,</span> |
| <span class="source-line-no">549</span><span id="line-549"> // it will pick a different meta replica region.</span> |
| <span class="source-line-no">550</span><span id="line-550"> if (metaReplicaMode == CatalogReplicaMode.LOAD_BALANCE) {</span> |
| <span class="source-line-no">551</span><span id="line-551"> metaReplicaSelector.onError(loc);</span> |
| <span class="source-line-no">552</span><span id="line-552"> }</span> |
| <span class="source-line-no">553</span><span id="line-553"> }</span> |
| <span class="source-line-no">554</span><span id="line-554"></span> |
| <span class="source-line-no">555</span><span id="line-555"> void addLocationToCache(HRegionLocation loc) {</span> |
| <span class="source-line-no">556</span><span id="line-556"> getTableCache(loc.getRegion().getTable()).regionLocationCache.add(createRegionLocations(loc));</span> |
| <span class="source-line-no">557</span><span id="line-557"> }</span> |
| <span class="source-line-no">558</span><span id="line-558"></span> |
| <span class="source-line-no">559</span><span id="line-559"> private HRegionLocation getCachedLocation(HRegionLocation loc) {</span> |
| <span class="source-line-no">560</span><span id="line-560"> TableCache tableCache = cache.get(loc.getRegion().getTable());</span> |
| <span class="source-line-no">561</span><span id="line-561"> if (tableCache == null) {</span> |
| <span class="source-line-no">562</span><span id="line-562"> return null;</span> |
| <span class="source-line-no">563</span><span id="line-563"> }</span> |
| <span class="source-line-no">564</span><span id="line-564"> RegionLocations locs = tableCache.regionLocationCache.get(loc.getRegion().getStartKey());</span> |
| <span class="source-line-no">565</span><span id="line-565"> return locs != null ? locs.getRegionLocation(loc.getRegion().getReplicaId()) : null;</span> |
| <span class="source-line-no">566</span><span id="line-566"> }</span> |
| <span class="source-line-no">567</span><span id="line-567"></span> |
| <span class="source-line-no">568</span><span id="line-568"> void updateCachedLocationOnError(HRegionLocation loc, Throwable exception) {</span> |
| <span class="source-line-no">569</span><span id="line-569"> Optional<MetricsConnection> connectionMetrics = conn.getConnectionMetrics();</span> |
| <span class="source-line-no">570</span><span id="line-570"> AsyncRegionLocatorHelper.updateCachedLocationOnError(loc, exception, this::getCachedLocation,</span> |
| <span class="source-line-no">571</span><span id="line-571"> this::addLocationToCache, this::removeLocationFromCache, connectionMetrics.orElse(null));</span> |
| <span class="source-line-no">572</span><span id="line-572"> }</span> |
| <span class="source-line-no">573</span><span id="line-573"></span> |
| <span class="source-line-no">574</span><span id="line-574"> void clearCache(TableName tableName) {</span> |
| <span class="source-line-no">575</span><span id="line-575"> TableCache tableCache = cache.remove(tableName);</span> |
| <span class="source-line-no">576</span><span id="line-576"> if (tableCache == null) {</span> |
| <span class="source-line-no">577</span><span id="line-577"> return;</span> |
| <span class="source-line-no">578</span><span id="line-578"> }</span> |
| <span class="source-line-no">579</span><span id="line-579"> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();</span> |
| <span class="source-line-no">580</span><span id="line-580"> synchronized (tableCache) {</span> |
| <span class="source-line-no">581</span><span id="line-581"> if (!tableCache.allRequests.isEmpty()) {</span> |
| <span class="source-line-no">582</span><span id="line-582"> IOException error = new IOException("Cache cleared");</span> |
| <span class="source-line-no">583</span><span id="line-583"> tableCache.allRequests.values().forEach(f -> {</span> |
| <span class="source-line-no">584</span><span id="line-584"> futureResultList.add(new RegionLocationsFutureResult(f, null, error));</span> |
| <span class="source-line-no">585</span><span id="line-585"> });</span> |
| <span class="source-line-no">586</span><span id="line-586"> }</span> |
| <span class="source-line-no">587</span><span id="line-587"> }</span> |
| <span class="source-line-no">588</span><span id="line-588"> futureResultList.forEach(RegionLocationsFutureResult::complete);</span> |
| <span class="source-line-no">589</span><span id="line-589"> conn.getConnectionMetrics().ifPresent(</span> |
| <span class="source-line-no">590</span><span id="line-590"> metrics -> metrics.incrMetaCacheNumClearRegion(tableCache.regionLocationCache.size()));</span> |
| <span class="source-line-no">591</span><span id="line-591"> }</span> |
| <span class="source-line-no">592</span><span id="line-592"></span> |
| <span class="source-line-no">593</span><span id="line-593"> void clearCache() {</span> |
| <span class="source-line-no">594</span><span id="line-594"> cache.clear();</span> |
| <span class="source-line-no">595</span><span id="line-595"> }</span> |
| <span class="source-line-no">596</span><span id="line-596"></span> |
| <span class="source-line-no">597</span><span id="line-597"> void clearCache(ServerName serverName) {</span> |
| <span class="source-line-no">598</span><span id="line-598"> for (TableCache tableCache : cache.values()) {</span> |
| <span class="source-line-no">599</span><span id="line-599"> tableCache.regionLocationCache.removeForServer(serverName);</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"> // only used for testing whether we have cached the location for a region.</span> |
| <span class="source-line-no">604</span><span id="line-604"> RegionLocations getRegionLocationInCache(TableName tableName, byte[] row) {</span> |
| <span class="source-line-no">605</span><span id="line-605"> TableCache tableCache = cache.get(tableName);</span> |
| <span class="source-line-no">606</span><span id="line-606"> if (tableCache == null) {</span> |
| <span class="source-line-no">607</span><span id="line-607"> return null;</span> |
| <span class="source-line-no">608</span><span id="line-608"> }</span> |
| <span class="source-line-no">609</span><span id="line-609"> return locateRowInCache(tableCache, row, RegionReplicaUtil.DEFAULT_REPLICA_ID);</span> |
| <span class="source-line-no">610</span><span id="line-610"> }</span> |
| <span class="source-line-no">611</span><span id="line-611"></span> |
| <span class="source-line-no">612</span><span id="line-612"> // only used for testing whether we have cached the location for a table.</span> |
| <span class="source-line-no">613</span><span id="line-613"> int getNumberOfCachedRegionLocations(TableName tableName) {</span> |
| <span class="source-line-no">614</span><span id="line-614"> TableCache tableCache = cache.get(tableName);</span> |
| <span class="source-line-no">615</span><span id="line-615"> if (tableCache == null) {</span> |
| <span class="source-line-no">616</span><span id="line-616"> return 0;</span> |
| <span class="source-line-no">617</span><span id="line-617"> }</span> |
| <span class="source-line-no">618</span><span id="line-618"> return tableCache.regionLocationCache.getAll().stream()</span> |
| <span class="source-line-no">619</span><span id="line-619"> .mapToInt(RegionLocations::numNonNullElements).sum();</span> |
| <span class="source-line-no">620</span><span id="line-620"> }</span> |
| <span class="source-line-no">621</span><span id="line-621">}</span> |
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| </main> |
| </body> |
| </html> |
