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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.client;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import static org.apache.hadoop.hbase.HConstants.DEFAULT_USE_META_REPLICAS;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.HConstants.EMPTY_END_ROW;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.apache.hadoop.hbase.HConstants.NINES;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import static org.apache.hadoop.hbase.HConstants.USE_META_REPLICAS;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import static org.apache.hadoop.hbase.HConstants.ZEROES;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import static org.apache.hadoop.hbase.TableName.META_TABLE_NAME;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.createRegionLocations;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.isGood;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import static org.apache.hadoop.hbase.client.RegionInfo.createRegionName;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import static org.apache.hadoop.hbase.client.RegionLocator.LOCATOR_META_REPLICAS_MODE;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import java.io.IOException;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import java.util.ArrayList;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import java.util.Arrays;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import java.util.HashSet;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import java.util.Iterator;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import java.util.LinkedHashMap;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import java.util.List;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import java.util.Map;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import java.util.Optional;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import java.util.Set;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import java.util.concurrent.CompletableFuture;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import java.util.concurrent.ConcurrentMap;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>import java.util.concurrent.TimeUnit;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span>import org.apache.commons.lang3.ObjectUtils;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.CatalogFamilyFormat;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.CatalogReplicaMode;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.HConstants;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.ServerName;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.TableName;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.TableNotFoundException;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.client.Scan.ReadType;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span>import org.slf4j.Logger;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span>import org.slf4j.LoggerFactory;<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> * The asynchronous locator for regions other than meta.<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> */<a name="line.66"></a> |
| <span class="sourceLineNo">067</span>@InterfaceAudience.Private<a name="line.67"></a> |
| <span class="sourceLineNo">068</span>class AsyncNonMetaRegionLocator {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span><a name="line.69"></a> |
| <span class="sourceLineNo">070</span> private static final Logger LOG = LoggerFactory.getLogger(AsyncNonMetaRegionLocator.class);<a name="line.70"></a> |
| <span class="sourceLineNo">071</span><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> static final String MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE =<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> "hbase.client.meta.max.concurrent.locate.per.table";<a name="line.73"></a> |
| <span class="sourceLineNo">074</span><a name="line.74"></a> |
| <span class="sourceLineNo">075</span> private static final int DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE = 8;<a name="line.75"></a> |
| <span class="sourceLineNo">076</span><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> static String LOCATE_PREFETCH_LIMIT = "hbase.client.locate.prefetch.limit";<a name="line.77"></a> |
| <span class="sourceLineNo">078</span><a name="line.78"></a> |
| <span class="sourceLineNo">079</span> private static final int DEFAULT_LOCATE_PREFETCH_LIMIT = 10;<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> private final AsyncConnectionImpl conn;<a name="line.81"></a> |
| <span class="sourceLineNo">082</span><a name="line.82"></a> |
| <span class="sourceLineNo">083</span> private final int maxConcurrentLocateRequestPerTable;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span><a name="line.84"></a> |
| <span class="sourceLineNo">085</span> private final int locatePrefetchLimit;<a name="line.85"></a> |
| <span class="sourceLineNo">086</span><a name="line.86"></a> |
| <span class="sourceLineNo">087</span> // The mode tells if HedgedRead, LoadBalance mode is supported.<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> // The default mode is CatalogReplicaMode.None.<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> private CatalogReplicaMode metaReplicaMode;<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> private CatalogReplicaLoadBalanceSelector metaReplicaSelector;<a name="line.90"></a> |
| <span class="sourceLineNo">091</span><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> private final ConcurrentMap<TableName, TableCache> cache = new ConcurrentHashMap<>();<a name="line.92"></a> |
| <span class="sourceLineNo">093</span><a name="line.93"></a> |
| <span class="sourceLineNo">094</span> private static final class LocateRequest {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span><a name="line.95"></a> |
| <span class="sourceLineNo">096</span> private final byte[] row;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span><a name="line.97"></a> |
| <span class="sourceLineNo">098</span> private final RegionLocateType locateType;<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> public LocateRequest(byte[] row, RegionLocateType locateType) {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> this.row = row;<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> this.locateType = locateType;<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> }<a name="line.103"></a> |
| <span class="sourceLineNo">104</span><a name="line.104"></a> |
| <span class="sourceLineNo">105</span> @Override<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> public int hashCode() {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> return Bytes.hashCode(row) ^ locateType.hashCode();<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> @Override<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> public boolean equals(Object obj) {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> if (obj == null || obj.getClass() != LocateRequest.class) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> return false;<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> LocateRequest that = (LocateRequest) obj;<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> return locateType.equals(that.locateType) && Bytes.equals(row, that.row);<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> }<a name="line.118"></a> |
| <span class="sourceLineNo">119</span><a name="line.119"></a> |
| <span class="sourceLineNo">120</span> private static final class RegionLocationsFutureResult {<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> private final CompletableFuture<RegionLocations> future;<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> private final RegionLocations result;<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> private final Throwable e;<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> public RegionLocationsFutureResult(CompletableFuture<RegionLocations> future,<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> RegionLocations result, Throwable e) {<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> this.future = future;<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> this.result = result;<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> this.e = e;<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> }<a name="line.130"></a> |
| <span class="sourceLineNo">131</span><a name="line.131"></a> |
| <span class="sourceLineNo">132</span> public void complete() {<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> if (e != null) {<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> future.completeExceptionally(e);<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> }<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> future.complete(result);<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> private static final class TableCache {<a name="line.140"></a> |
| <span class="sourceLineNo">141</span><a name="line.141"></a> |
| <span class="sourceLineNo">142</span> private final Set<LocateRequest> pendingRequests = new HashSet<>();<a name="line.142"></a> |
| <span class="sourceLineNo">143</span><a name="line.143"></a> |
| <span class="sourceLineNo">144</span> private final Map<LocateRequest, CompletableFuture<RegionLocations>> allRequests =<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> new LinkedHashMap<>();<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> private final AsyncRegionLocationCache regionLocationCache;<a name="line.146"></a> |
| <span class="sourceLineNo">147</span><a name="line.147"></a> |
| <span class="sourceLineNo">148</span> public TableCache(TableName tableName) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> regionLocationCache = new AsyncRegionLocationCache(tableName);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> }<a name="line.150"></a> |
| <span class="sourceLineNo">151</span><a name="line.151"></a> |
| <span class="sourceLineNo">152</span> public boolean hasQuota(int max) {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> return pendingRequests.size() < max;<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> }<a name="line.154"></a> |
| <span class="sourceLineNo">155</span><a name="line.155"></a> |
| <span class="sourceLineNo">156</span> public boolean isPending(LocateRequest req) {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> return pendingRequests.contains(req);<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> }<a name="line.158"></a> |
| <span class="sourceLineNo">159</span><a name="line.159"></a> |
| <span class="sourceLineNo">160</span> public void send(LocateRequest req) {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> pendingRequests.add(req);<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> }<a name="line.162"></a> |
| <span class="sourceLineNo">163</span><a name="line.163"></a> |
| <span class="sourceLineNo">164</span> public Optional<LocateRequest> getCandidate() {<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> return allRequests.keySet().stream().filter(r -> !isPending(r)).findFirst();<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> }<a name="line.166"></a> |
| <span class="sourceLineNo">167</span><a name="line.167"></a> |
| <span class="sourceLineNo">168</span> public List<RegionLocationsFutureResult> clearCompletedRequests(RegionLocations locations) {<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> for (Iterator<Map.Entry<LocateRequest, CompletableFuture<RegionLocations>>> iter =<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> allRequests.entrySet().iterator(); iter.hasNext();) {<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> Map.Entry<LocateRequest, CompletableFuture<RegionLocations>> entry = iter.next();<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> if (tryComplete(entry.getKey(), entry.getValue(), locations, futureResultList)) {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> iter.remove();<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> }<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> }<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> return futureResultList;<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> }<a name="line.178"></a> |
| <span class="sourceLineNo">179</span><a name="line.179"></a> |
| <span class="sourceLineNo">180</span> private boolean tryComplete(LocateRequest req, CompletableFuture<RegionLocations> future,<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> RegionLocations locations, List<RegionLocationsFutureResult> futureResultList) {<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> if (future.isDone()) {<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> return true;<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> }<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> if (locations == null) {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> return false;<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> }<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> HRegionLocation loc = ObjectUtils.firstNonNull(locations.getRegionLocations());<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> // we should at least have one location available, otherwise the request should fail and<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> // should not arrive here<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> assert loc != null;<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> boolean completed;<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> if (req.locateType.equals(RegionLocateType.BEFORE)) {<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> // for locating the row before current row, the common case is to find the previous region<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> // in reverse scan, so we check the endKey first. In general, the condition should be<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> // startKey < req.row and endKey >= req.row. Here we split it to endKey == req.row ||<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> // (endKey > req.row && startKey < req.row). The two conditions are equal since startKey <<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> // endKey.<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> byte[] endKey = loc.getRegion().getEndKey();<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> int c = Bytes.compareTo(endKey, req.row);<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> completed = c == 0 || ((c > 0 || Bytes.equals(EMPTY_END_ROW, endKey))<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> && Bytes.compareTo(loc.getRegion().getStartKey(), req.row) < 0);<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> } else {<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> completed = loc.getRegion().containsRow(req.row);<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> }<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> if (completed) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> futureResultList.add(new RegionLocationsFutureResult(future, locations, null));<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> return true;<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> } else {<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> return false;<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> }<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> }<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> }<a name="line.213"></a> |
| <span class="sourceLineNo">214</span><a name="line.214"></a> |
| <span class="sourceLineNo">215</span> AsyncNonMetaRegionLocator(AsyncConnectionImpl conn) {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> this.conn = conn;<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> this.maxConcurrentLocateRequestPerTable = conn.getConfiguration().getInt(<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE, DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE);<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> this.locatePrefetchLimit =<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> conn.getConfiguration().getInt(LOCATE_PREFETCH_LIMIT, DEFAULT_LOCATE_PREFETCH_LIMIT);<a name="line.220"></a> |
| <span class="sourceLineNo">221</span><a name="line.221"></a> |
| <span class="sourceLineNo">222</span> // Get the region locator's meta replica mode.<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> this.metaReplicaMode = CatalogReplicaMode.fromString(<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> conn.getConfiguration().get(LOCATOR_META_REPLICAS_MODE, CatalogReplicaMode.NONE.toString()));<a name="line.224"></a> |
| <span class="sourceLineNo">225</span><a name="line.225"></a> |
| <span class="sourceLineNo">226</span> switch (this.metaReplicaMode) {<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> case LOAD_BALANCE:<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> String replicaSelectorClass =<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> conn.getConfiguration().get(RegionLocator.LOCATOR_META_REPLICAS_MODE_LOADBALANCE_SELECTOR,<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> CatalogReplicaLoadBalanceSimpleSelector.class.getName());<a name="line.230"></a> |
| <span class="sourceLineNo">231</span><a name="line.231"></a> |
| <span class="sourceLineNo">232</span> this.metaReplicaSelector = CatalogReplicaLoadBalanceSelectorFactory<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> .createSelector(replicaSelectorClass, META_TABLE_NAME, conn, () -> {<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> int numOfReplicas = CatalogReplicaLoadBalanceSelector.UNINITIALIZED_NUM_OF_REPLICAS;<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> try {<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> RegionLocations metaLocations = conn.registry.getMetaRegionLocations()<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> .get(conn.connConf.getReadRpcTimeoutNs(), TimeUnit.NANOSECONDS);<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> numOfReplicas = metaLocations.size();<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> } catch (Exception e) {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> LOG.error("Failed to get table {}'s region replication, ", META_TABLE_NAME, e);<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> }<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> return numOfReplicas;<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> });<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> break;<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> case NONE:<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> // If user does not configure LOCATOR_META_REPLICAS_MODE, let's check the legacy config.<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> boolean useMetaReplicas =<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> conn.getConfiguration().getBoolean(USE_META_REPLICAS, DEFAULT_USE_META_REPLICAS);<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> if (useMetaReplicas) {<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> this.metaReplicaMode = CatalogReplicaMode.HEDGED_READ;<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> }<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> break;<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> default:<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> // Doing nothing<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> }<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> }<a name="line.256"></a> |
| <span class="sourceLineNo">257</span><a name="line.257"></a> |
| <span class="sourceLineNo">258</span> private TableCache getTableCache(TableName tableName) {<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> return computeIfAbsent(cache, tableName, () -> new TableCache(tableName));<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> }<a name="line.260"></a> |
| <span class="sourceLineNo">261</span><a name="line.261"></a> |
| <span class="sourceLineNo">262</span> private void complete(TableName tableName, LocateRequest req, RegionLocations locs,<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> Throwable error) {<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> if (error != null) {<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> LOG.warn("Failed to locate region in '" + tableName + "', row='"<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> + Bytes.toStringBinary(req.row) + "', locateType=" + req.locateType, error);<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> }<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> Optional<LocateRequest> toSend = Optional.empty();<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> TableCache tableCache = getTableCache(tableName);<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> if (locs != null) {<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> RegionLocations addedLocs = tableCache.regionLocationCache.add(locs);<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> synchronized (tableCache) {<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> tableCache.pendingRequests.remove(req);<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> futureResultList.addAll(tableCache.clearCompletedRequests(addedLocs));<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> // quota to send a candidate request.<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> toSend = tableCache.getCandidate();<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> toSend.ifPresent(r -> tableCache.send(r));<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> }<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> futureResultList.forEach(RegionLocationsFutureResult::complete);<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> toSend.ifPresent(r -> locateInMeta(tableName, r));<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> } else {<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> // we meet an error<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> assert error != null;<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> synchronized (tableCache) {<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> tableCache.pendingRequests.remove(req);<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> // fail the request itself, no matter whether it is a DoNotRetryIOException, as we have<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> // already retried several times<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> CompletableFuture<RegionLocations> future = tableCache.allRequests.remove(req);<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> if (future != null) {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> futureResultList.add(new RegionLocationsFutureResult(future, null, error));<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> }<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> futureResultList.addAll(tableCache.clearCompletedRequests(null));<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> // quota to send a candidate request.<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> toSend = tableCache.getCandidate();<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> toSend.ifPresent(r -> tableCache.send(r));<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> }<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> futureResultList.forEach(RegionLocationsFutureResult::complete);<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> toSend.ifPresent(r -> locateInMeta(tableName, r));<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> }<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> }<a name="line.304"></a> |
| <span class="sourceLineNo">305</span><a name="line.305"></a> |
| <span class="sourceLineNo">306</span> // return whether we should stop the scan<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> private boolean onScanNext(TableName tableName, LocateRequest req, Result result) {<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> RegionLocations locs = CatalogFamilyFormat.getRegionLocations(result);<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> if (LOG.isDebugEnabled()) {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> LOG.debug("The fetched location of '{}', row='{}', locateType={} is {}", tableName,<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> Bytes.toStringBinary(req.row), req.locateType, locs);<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> }<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> // remove HRegionLocation with null location, i.e, getServerName returns null.<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> if (locs != null) {<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> locs = locs.removeElementsWithNullLocation();<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> }<a name="line.316"></a> |
| <span class="sourceLineNo">317</span><a name="line.317"></a> |
| <span class="sourceLineNo">318</span> // the default region location should always be presented when fetching from meta, otherwise<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> // let's fail the request.<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> if (locs == null || locs.getDefaultRegionLocation() == null) {<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> complete(tableName, req, null,<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> new HBaseIOException(String.format("No location found for '%s', row='%s', locateType=%s",<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> tableName, Bytes.toStringBinary(req.row), req.locateType)));<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> return true;<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> }<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> HRegionLocation loc = locs.getDefaultRegionLocation();<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> RegionInfo info = loc.getRegion();<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> if (info == null) {<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> complete(tableName, req, null,<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> new HBaseIOException(String.format("HRegionInfo is null for '%s', row='%s', locateType=%s",<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> tableName, Bytes.toStringBinary(req.row), req.locateType)));<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> return true;<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> }<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> if (info.isSplitParent()) {<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> return false;<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> }<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> complete(tableName, req, locs, null);<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> return true;<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> }<a name="line.339"></a> |
| <span class="sourceLineNo">340</span><a name="line.340"></a> |
| <span class="sourceLineNo">341</span> private void recordCacheHit() {<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> conn.getConnectionMetrics().ifPresent(MetricsConnection::incrMetaCacheHit);<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> }<a name="line.343"></a> |
| <span class="sourceLineNo">344</span><a name="line.344"></a> |
| <span class="sourceLineNo">345</span> private void recordCacheMiss() {<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> conn.getConnectionMetrics().ifPresent(MetricsConnection::incrMetaCacheMiss);<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> }<a name="line.347"></a> |
| <span class="sourceLineNo">348</span><a name="line.348"></a> |
| <span class="sourceLineNo">349</span> private RegionLocations locateRowInCache(TableCache tableCache, byte[] row, int replicaId) {<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> RegionLocations locs = tableCache.regionLocationCache.findForRow(row, replicaId);<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> if (locs == null) {<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> recordCacheMiss();<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> } else {<a name="line.353"></a> |
| <span class="sourceLineNo">354</span> recordCacheHit();<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> }<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> return locs;<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> }<a name="line.357"></a> |
| <span class="sourceLineNo">358</span><a name="line.358"></a> |
| <span class="sourceLineNo">359</span> private RegionLocations locateRowBeforeInCache(TableCache tableCache, byte[] row, int replicaId) {<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> RegionLocations locs = tableCache.regionLocationCache.findForBeforeRow(row, replicaId);<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> if (locs == null) {<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> recordCacheMiss();<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> } else {<a name="line.363"></a> |
| <span class="sourceLineNo">364</span> recordCacheHit();<a name="line.364"></a> |
| <span class="sourceLineNo">365</span> }<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> return locs;<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> }<a name="line.367"></a> |
| <span class="sourceLineNo">368</span><a name="line.368"></a> |
| <span class="sourceLineNo">369</span> private void locateInMeta(TableName tableName, LocateRequest req) {<a name="line.369"></a> |
| <span class="sourceLineNo">370</span> if (LOG.isTraceEnabled()) {<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> LOG.trace("Try locate '" + tableName + "', row='" + Bytes.toStringBinary(req.row)<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> + "', locateType=" + req.locateType + " in meta");<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> }<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> byte[] metaStartKey;<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> if (req.locateType.equals(RegionLocateType.BEFORE)) {<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> if (isEmptyStopRow(req.row)) {<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> byte[] binaryTableName = tableName.getName();<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> metaStartKey = Arrays.copyOf(binaryTableName, binaryTableName.length + 1);<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> } else {<a name="line.379"></a> |
| <span class="sourceLineNo">380</span> metaStartKey = createRegionName(tableName, req.row, ZEROES, false);<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> }<a name="line.381"></a> |
| <span class="sourceLineNo">382</span> } else {<a name="line.382"></a> |
| <span class="sourceLineNo">383</span> metaStartKey = createRegionName(tableName, req.row, NINES, false);<a name="line.383"></a> |
| <span class="sourceLineNo">384</span> }<a name="line.384"></a> |
| <span class="sourceLineNo">385</span> byte[] metaStopKey =<a name="line.385"></a> |
| <span class="sourceLineNo">386</span> RegionInfo.createRegionName(tableName, HConstants.EMPTY_START_ROW, "", false);<a name="line.386"></a> |
| <span class="sourceLineNo">387</span> Scan scan = new Scan().withStartRow(metaStartKey).withStopRow(metaStopKey, true)<a name="line.387"></a> |
| <span class="sourceLineNo">388</span> .addFamily(HConstants.CATALOG_FAMILY).setReversed(true).setCaching(locatePrefetchLimit)<a name="line.388"></a> |
| <span class="sourceLineNo">389</span> .setReadType(ReadType.PREAD);<a name="line.389"></a> |
| <span class="sourceLineNo">390</span><a name="line.390"></a> |
| <span class="sourceLineNo">391</span> switch (this.metaReplicaMode) {<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> case LOAD_BALANCE:<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> int metaReplicaId = this.metaReplicaSelector.select(tableName, req.row, req.locateType);<a name="line.393"></a> |
| <span class="sourceLineNo">394</span> if (metaReplicaId != RegionInfo.DEFAULT_REPLICA_ID) {<a name="line.394"></a> |
| <span class="sourceLineNo">395</span> // If the selector gives a non-primary meta replica region, then go with it.<a name="line.395"></a> |
| <span class="sourceLineNo">396</span> // Otherwise, just go to primary in non-hedgedRead mode.<a name="line.396"></a> |
| <span class="sourceLineNo">397</span> scan.setConsistency(Consistency.TIMELINE);<a name="line.397"></a> |
| <span class="sourceLineNo">398</span> scan.setReplicaId(metaReplicaId);<a name="line.398"></a> |
| <span class="sourceLineNo">399</span> }<a name="line.399"></a> |
| <span class="sourceLineNo">400</span> break;<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> case HEDGED_READ:<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> scan.setConsistency(Consistency.TIMELINE);<a name="line.402"></a> |
| <span class="sourceLineNo">403</span> break;<a name="line.403"></a> |
| <span class="sourceLineNo">404</span> default:<a name="line.404"></a> |
| <span class="sourceLineNo">405</span> // do nothing<a name="line.405"></a> |
| <span class="sourceLineNo">406</span> }<a name="line.406"></a> |
| <span class="sourceLineNo">407</span><a name="line.407"></a> |
| <span class="sourceLineNo">408</span> conn.getTable(META_TABLE_NAME).scan(scan, new AdvancedScanResultConsumer() {<a name="line.408"></a> |
| <span class="sourceLineNo">409</span><a name="line.409"></a> |
| <span class="sourceLineNo">410</span> private boolean completeNormally = false;<a name="line.410"></a> |
| <span class="sourceLineNo">411</span><a name="line.411"></a> |
| <span class="sourceLineNo">412</span> private boolean tableNotFound = true;<a name="line.412"></a> |
| <span class="sourceLineNo">413</span><a name="line.413"></a> |
| <span class="sourceLineNo">414</span> @Override<a name="line.414"></a> |
| <span class="sourceLineNo">415</span> public void onError(Throwable error) {<a name="line.415"></a> |
| <span class="sourceLineNo">416</span> complete(tableName, req, null, error);<a name="line.416"></a> |
| <span class="sourceLineNo">417</span> }<a name="line.417"></a> |
| <span class="sourceLineNo">418</span><a name="line.418"></a> |
| <span class="sourceLineNo">419</span> @Override<a name="line.419"></a> |
| <span class="sourceLineNo">420</span> public void onComplete() {<a name="line.420"></a> |
| <span class="sourceLineNo">421</span> if (tableNotFound) {<a name="line.421"></a> |
| <span class="sourceLineNo">422</span> complete(tableName, req, null, new TableNotFoundException(tableName));<a name="line.422"></a> |
| <span class="sourceLineNo">423</span> } else if (!completeNormally) {<a name="line.423"></a> |
| <span class="sourceLineNo">424</span> complete(tableName, req, null, new IOException(<a name="line.424"></a> |
| <span class="sourceLineNo">425</span> "Unable to find region for '" + Bytes.toStringBinary(req.row) + "' in " + tableName));<a name="line.425"></a> |
| <span class="sourceLineNo">426</span> }<a name="line.426"></a> |
| <span class="sourceLineNo">427</span> }<a name="line.427"></a> |
| <span class="sourceLineNo">428</span><a name="line.428"></a> |
| <span class="sourceLineNo">429</span> @Override<a name="line.429"></a> |
| <span class="sourceLineNo">430</span> public void onNext(Result[] results, ScanController controller) {<a name="line.430"></a> |
| <span class="sourceLineNo">431</span> if (results.length == 0) {<a name="line.431"></a> |
| <span class="sourceLineNo">432</span> return;<a name="line.432"></a> |
| <span class="sourceLineNo">433</span> }<a name="line.433"></a> |
| <span class="sourceLineNo">434</span> tableNotFound = false;<a name="line.434"></a> |
| <span class="sourceLineNo">435</span> int i = 0;<a name="line.435"></a> |
| <span class="sourceLineNo">436</span> for (; i < results.length; i++) {<a name="line.436"></a> |
| <span class="sourceLineNo">437</span> if (onScanNext(tableName, req, results[i])) {<a name="line.437"></a> |
| <span class="sourceLineNo">438</span> completeNormally = true;<a name="line.438"></a> |
| <span class="sourceLineNo">439</span> controller.terminate();<a name="line.439"></a> |
| <span class="sourceLineNo">440</span> i++;<a name="line.440"></a> |
| <span class="sourceLineNo">441</span> break;<a name="line.441"></a> |
| <span class="sourceLineNo">442</span> }<a name="line.442"></a> |
| <span class="sourceLineNo">443</span> }<a name="line.443"></a> |
| <span class="sourceLineNo">444</span> // Add the remaining results into cache<a name="line.444"></a> |
| <span class="sourceLineNo">445</span> if (i < results.length) {<a name="line.445"></a> |
| <span class="sourceLineNo">446</span> TableCache tableCache = getTableCache(tableName);<a name="line.446"></a> |
| <span class="sourceLineNo">447</span> for (; i < results.length; i++) {<a name="line.447"></a> |
| <span class="sourceLineNo">448</span> RegionLocations locs = CatalogFamilyFormat.getRegionLocations(results[i]);<a name="line.448"></a> |
| <span class="sourceLineNo">449</span> if (locs == null) {<a name="line.449"></a> |
| <span class="sourceLineNo">450</span> continue;<a name="line.450"></a> |
| <span class="sourceLineNo">451</span> }<a name="line.451"></a> |
| <span class="sourceLineNo">452</span> HRegionLocation loc = locs.getDefaultRegionLocation();<a name="line.452"></a> |
| <span class="sourceLineNo">453</span> if (loc == null) {<a name="line.453"></a> |
| <span class="sourceLineNo">454</span> continue;<a name="line.454"></a> |
| <span class="sourceLineNo">455</span> }<a name="line.455"></a> |
| <span class="sourceLineNo">456</span> RegionInfo info = loc.getRegion();<a name="line.456"></a> |
| <span class="sourceLineNo">457</span> if (info == null || info.isOffline() || info.isSplitParent()) {<a name="line.457"></a> |
| <span class="sourceLineNo">458</span> continue;<a name="line.458"></a> |
| <span class="sourceLineNo">459</span> }<a name="line.459"></a> |
| <span class="sourceLineNo">460</span> RegionLocations addedLocs = tableCache.regionLocationCache.add(locs);<a name="line.460"></a> |
| <span class="sourceLineNo">461</span> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();<a name="line.461"></a> |
| <span class="sourceLineNo">462</span> synchronized (tableCache) {<a name="line.462"></a> |
| <span class="sourceLineNo">463</span> futureResultList.addAll(tableCache.clearCompletedRequests(addedLocs));<a name="line.463"></a> |
| <span class="sourceLineNo">464</span> }<a name="line.464"></a> |
| <span class="sourceLineNo">465</span> futureResultList.forEach(RegionLocationsFutureResult::complete);<a name="line.465"></a> |
| <span class="sourceLineNo">466</span> }<a name="line.466"></a> |
| <span class="sourceLineNo">467</span> }<a name="line.467"></a> |
| <span class="sourceLineNo">468</span> }<a name="line.468"></a> |
| <span class="sourceLineNo">469</span> });<a name="line.469"></a> |
| <span class="sourceLineNo">470</span> }<a name="line.470"></a> |
| <span class="sourceLineNo">471</span><a name="line.471"></a> |
| <span class="sourceLineNo">472</span> private RegionLocations locateInCache(TableCache tableCache, byte[] row, int replicaId,<a name="line.472"></a> |
| <span class="sourceLineNo">473</span> RegionLocateType locateType) {<a name="line.473"></a> |
| <span class="sourceLineNo">474</span> return locateType.equals(RegionLocateType.BEFORE)<a name="line.474"></a> |
| <span class="sourceLineNo">475</span> ? locateRowBeforeInCache(tableCache, row, replicaId)<a name="line.475"></a> |
| <span class="sourceLineNo">476</span> : locateRowInCache(tableCache, row, replicaId);<a name="line.476"></a> |
| <span class="sourceLineNo">477</span> }<a name="line.477"></a> |
| <span class="sourceLineNo">478</span><a name="line.478"></a> |
| <span class="sourceLineNo">479</span> // locateToPrevious is true means we will use the start key of a region to locate the region<a name="line.479"></a> |
| <span class="sourceLineNo">480</span> // placed before it. Used for reverse scan. See the comment of<a name="line.480"></a> |
| <span class="sourceLineNo">481</span> // AsyncRegionLocator.getPreviousRegionLocation.<a name="line.481"></a> |
| <span class="sourceLineNo">482</span> private CompletableFuture<RegionLocations> getRegionLocationsInternal(TableName tableName,<a name="line.482"></a> |
| <span class="sourceLineNo">483</span> byte[] row, int replicaId, RegionLocateType locateType, boolean reload) {<a name="line.483"></a> |
| <span class="sourceLineNo">484</span> // AFTER should be convert to CURRENT before calling this method<a name="line.484"></a> |
| <span class="sourceLineNo">485</span> assert !locateType.equals(RegionLocateType.AFTER);<a name="line.485"></a> |
| <span class="sourceLineNo">486</span> TableCache tableCache = getTableCache(tableName);<a name="line.486"></a> |
| <span class="sourceLineNo">487</span> if (!reload) {<a name="line.487"></a> |
| <span class="sourceLineNo">488</span> RegionLocations locs = locateInCache(tableCache, row, replicaId, locateType);<a name="line.488"></a> |
| <span class="sourceLineNo">489</span> if (isGood(locs, replicaId)) {<a name="line.489"></a> |
| <span class="sourceLineNo">490</span> return CompletableFuture.completedFuture(locs);<a name="line.490"></a> |
| <span class="sourceLineNo">491</span> }<a name="line.491"></a> |
| <span class="sourceLineNo">492</span> }<a name="line.492"></a> |
| <span class="sourceLineNo">493</span> CompletableFuture<RegionLocations> future;<a name="line.493"></a> |
| <span class="sourceLineNo">494</span> LocateRequest req;<a name="line.494"></a> |
| <span class="sourceLineNo">495</span> boolean sendRequest = false;<a name="line.495"></a> |
| <span class="sourceLineNo">496</span> synchronized (tableCache) {<a name="line.496"></a> |
| <span class="sourceLineNo">497</span> // check again<a name="line.497"></a> |
| <span class="sourceLineNo">498</span> if (!reload) {<a name="line.498"></a> |
| <span class="sourceLineNo">499</span> RegionLocations locs = locateInCache(tableCache, row, replicaId, locateType);<a name="line.499"></a> |
| <span class="sourceLineNo">500</span> if (isGood(locs, replicaId)) {<a name="line.500"></a> |
| <span class="sourceLineNo">501</span> return CompletableFuture.completedFuture(locs);<a name="line.501"></a> |
| <span class="sourceLineNo">502</span> }<a name="line.502"></a> |
| <span class="sourceLineNo">503</span> }<a name="line.503"></a> |
| <span class="sourceLineNo">504</span> req = new LocateRequest(row, locateType);<a name="line.504"></a> |
| <span class="sourceLineNo">505</span> future = tableCache.allRequests.get(req);<a name="line.505"></a> |
| <span class="sourceLineNo">506</span> if (future == null) {<a name="line.506"></a> |
| <span class="sourceLineNo">507</span> future = new CompletableFuture<>();<a name="line.507"></a> |
| <span class="sourceLineNo">508</span> tableCache.allRequests.put(req, future);<a name="line.508"></a> |
| <span class="sourceLineNo">509</span> if (tableCache.hasQuota(maxConcurrentLocateRequestPerTable) && !tableCache.isPending(req)) {<a name="line.509"></a> |
| <span class="sourceLineNo">510</span> tableCache.send(req);<a name="line.510"></a> |
| <span class="sourceLineNo">511</span> sendRequest = true;<a name="line.511"></a> |
| <span class="sourceLineNo">512</span> }<a name="line.512"></a> |
| <span class="sourceLineNo">513</span> }<a name="line.513"></a> |
| <span class="sourceLineNo">514</span> }<a name="line.514"></a> |
| <span class="sourceLineNo">515</span> if (sendRequest) {<a name="line.515"></a> |
| <span class="sourceLineNo">516</span> locateInMeta(tableName, req);<a name="line.516"></a> |
| <span class="sourceLineNo">517</span> }<a name="line.517"></a> |
| <span class="sourceLineNo">518</span> return future;<a name="line.518"></a> |
| <span class="sourceLineNo">519</span> }<a name="line.519"></a> |
| <span class="sourceLineNo">520</span><a name="line.520"></a> |
| <span class="sourceLineNo">521</span> CompletableFuture<RegionLocations> getRegionLocations(TableName tableName, byte[] row,<a name="line.521"></a> |
| <span class="sourceLineNo">522</span> int replicaId, RegionLocateType locateType, boolean reload) {<a name="line.522"></a> |
| <span class="sourceLineNo">523</span> // as we know the exact row after us, so we can just create the new row, and use the same<a name="line.523"></a> |
| <span class="sourceLineNo">524</span> // algorithm to locate it.<a name="line.524"></a> |
| <span class="sourceLineNo">525</span> if (locateType.equals(RegionLocateType.AFTER)) {<a name="line.525"></a> |
| <span class="sourceLineNo">526</span> row = createClosestRowAfter(row);<a name="line.526"></a> |
| <span class="sourceLineNo">527</span> locateType = RegionLocateType.CURRENT;<a name="line.527"></a> |
| <span class="sourceLineNo">528</span> }<a name="line.528"></a> |
| <span class="sourceLineNo">529</span> return getRegionLocationsInternal(tableName, row, replicaId, locateType, reload);<a name="line.529"></a> |
| <span class="sourceLineNo">530</span> }<a name="line.530"></a> |
| <span class="sourceLineNo">531</span><a name="line.531"></a> |
| <span class="sourceLineNo">532</span> private void recordClearRegionCache() {<a name="line.532"></a> |
| <span class="sourceLineNo">533</span> conn.getConnectionMetrics().ifPresent(MetricsConnection::incrMetaCacheNumClearRegion);<a name="line.533"></a> |
| <span class="sourceLineNo">534</span> }<a name="line.534"></a> |
| <span class="sourceLineNo">535</span><a name="line.535"></a> |
| <span class="sourceLineNo">536</span> private void removeLocationFromCache(HRegionLocation loc) {<a name="line.536"></a> |
| <span class="sourceLineNo">537</span> TableCache tableCache = cache.get(loc.getRegion().getTable());<a name="line.537"></a> |
| <span class="sourceLineNo">538</span> if (tableCache != null) {<a name="line.538"></a> |
| <span class="sourceLineNo">539</span> if (tableCache.regionLocationCache.remove(loc)) {<a name="line.539"></a> |
| <span class="sourceLineNo">540</span> recordClearRegionCache();<a name="line.540"></a> |
| <span class="sourceLineNo">541</span> updateMetaReplicaSelector(loc);<a name="line.541"></a> |
| <span class="sourceLineNo">542</span> }<a name="line.542"></a> |
| <span class="sourceLineNo">543</span> }<a name="line.543"></a> |
| <span class="sourceLineNo">544</span> }<a name="line.544"></a> |
| <span class="sourceLineNo">545</span><a name="line.545"></a> |
| <span class="sourceLineNo">546</span> private void updateMetaReplicaSelector(HRegionLocation loc) {<a name="line.546"></a> |
| <span class="sourceLineNo">547</span> // Tell metaReplicaSelector that the location is stale. It will create a stale entry<a name="line.547"></a> |
| <span class="sourceLineNo">548</span> // with timestamp internally. Next time the client looks up the same location,<a name="line.548"></a> |
| <span class="sourceLineNo">549</span> // it will pick a different meta replica region.<a name="line.549"></a> |
| <span class="sourceLineNo">550</span> if (metaReplicaMode == CatalogReplicaMode.LOAD_BALANCE) {<a name="line.550"></a> |
| <span class="sourceLineNo">551</span> metaReplicaSelector.onError(loc);<a name="line.551"></a> |
| <span class="sourceLineNo">552</span> }<a name="line.552"></a> |
| <span class="sourceLineNo">553</span> }<a name="line.553"></a> |
| <span class="sourceLineNo">554</span><a name="line.554"></a> |
| <span class="sourceLineNo">555</span> void addLocationToCache(HRegionLocation loc) {<a name="line.555"></a> |
| <span class="sourceLineNo">556</span> getTableCache(loc.getRegion().getTable()).regionLocationCache.add(createRegionLocations(loc));<a name="line.556"></a> |
| <span class="sourceLineNo">557</span> }<a name="line.557"></a> |
| <span class="sourceLineNo">558</span><a name="line.558"></a> |
| <span class="sourceLineNo">559</span> private HRegionLocation getCachedLocation(HRegionLocation loc) {<a name="line.559"></a> |
| <span class="sourceLineNo">560</span> TableCache tableCache = cache.get(loc.getRegion().getTable());<a name="line.560"></a> |
| <span class="sourceLineNo">561</span> if (tableCache == null) {<a name="line.561"></a> |
| <span class="sourceLineNo">562</span> return null;<a name="line.562"></a> |
| <span class="sourceLineNo">563</span> }<a name="line.563"></a> |
| <span class="sourceLineNo">564</span> RegionLocations locs = tableCache.regionLocationCache.get(loc.getRegion().getStartKey());<a name="line.564"></a> |
| <span class="sourceLineNo">565</span> return locs != null ? locs.getRegionLocation(loc.getRegion().getReplicaId()) : null;<a name="line.565"></a> |
| <span class="sourceLineNo">566</span> }<a name="line.566"></a> |
| <span class="sourceLineNo">567</span><a name="line.567"></a> |
| <span class="sourceLineNo">568</span> void updateCachedLocationOnError(HRegionLocation loc, Throwable exception) {<a name="line.568"></a> |
| <span class="sourceLineNo">569</span> Optional<MetricsConnection> connectionMetrics = conn.getConnectionMetrics();<a name="line.569"></a> |
| <span class="sourceLineNo">570</span> AsyncRegionLocatorHelper.updateCachedLocationOnError(loc, exception, this::getCachedLocation,<a name="line.570"></a> |
| <span class="sourceLineNo">571</span> this::addLocationToCache, this::removeLocationFromCache, connectionMetrics.orElse(null));<a name="line.571"></a> |
| <span class="sourceLineNo">572</span> }<a name="line.572"></a> |
| <span class="sourceLineNo">573</span><a name="line.573"></a> |
| <span class="sourceLineNo">574</span> void clearCache(TableName tableName) {<a name="line.574"></a> |
| <span class="sourceLineNo">575</span> TableCache tableCache = cache.remove(tableName);<a name="line.575"></a> |
| <span class="sourceLineNo">576</span> if (tableCache == null) {<a name="line.576"></a> |
| <span class="sourceLineNo">577</span> return;<a name="line.577"></a> |
| <span class="sourceLineNo">578</span> }<a name="line.578"></a> |
| <span class="sourceLineNo">579</span> List<RegionLocationsFutureResult> futureResultList = new ArrayList<>();<a name="line.579"></a> |
| <span class="sourceLineNo">580</span> synchronized (tableCache) {<a name="line.580"></a> |
| <span class="sourceLineNo">581</span> if (!tableCache.allRequests.isEmpty()) {<a name="line.581"></a> |
| <span class="sourceLineNo">582</span> IOException error = new IOException("Cache cleared");<a name="line.582"></a> |
| <span class="sourceLineNo">583</span> tableCache.allRequests.values().forEach(f -> {<a name="line.583"></a> |
| <span class="sourceLineNo">584</span> futureResultList.add(new RegionLocationsFutureResult(f, null, error));<a name="line.584"></a> |
| <span class="sourceLineNo">585</span> });<a name="line.585"></a> |
| <span class="sourceLineNo">586</span> }<a name="line.586"></a> |
| <span class="sourceLineNo">587</span> }<a name="line.587"></a> |
| <span class="sourceLineNo">588</span> futureResultList.forEach(RegionLocationsFutureResult::complete);<a name="line.588"></a> |
| <span class="sourceLineNo">589</span> conn.getConnectionMetrics().ifPresent(<a name="line.589"></a> |
| <span class="sourceLineNo">590</span> metrics -> metrics.incrMetaCacheNumClearRegion(tableCache.regionLocationCache.size()));<a name="line.590"></a> |
| <span class="sourceLineNo">591</span> }<a name="line.591"></a> |
| <span class="sourceLineNo">592</span><a name="line.592"></a> |
| <span class="sourceLineNo">593</span> void clearCache() {<a name="line.593"></a> |
| <span class="sourceLineNo">594</span> cache.clear();<a name="line.594"></a> |
| <span class="sourceLineNo">595</span> }<a name="line.595"></a> |
| <span class="sourceLineNo">596</span><a name="line.596"></a> |
| <span class="sourceLineNo">597</span> void clearCache(ServerName serverName) {<a name="line.597"></a> |
| <span class="sourceLineNo">598</span> for (TableCache tableCache : cache.values()) {<a name="line.598"></a> |
| <span class="sourceLineNo">599</span> tableCache.regionLocationCache.removeForServer(serverName);<a name="line.599"></a> |
| <span class="sourceLineNo">600</span> }<a name="line.600"></a> |
| <span class="sourceLineNo">601</span> }<a name="line.601"></a> |
| <span class="sourceLineNo">602</span><a name="line.602"></a> |
| <span class="sourceLineNo">603</span> // only used for testing whether we have cached the location for a region.<a name="line.603"></a> |
| <span class="sourceLineNo">604</span> RegionLocations getRegionLocationInCache(TableName tableName, byte[] row) {<a name="line.604"></a> |
| <span class="sourceLineNo">605</span> TableCache tableCache = cache.get(tableName);<a name="line.605"></a> |
| <span class="sourceLineNo">606</span> if (tableCache == null) {<a name="line.606"></a> |
| <span class="sourceLineNo">607</span> return null;<a name="line.607"></a> |
| <span class="sourceLineNo">608</span> }<a name="line.608"></a> |
| <span class="sourceLineNo">609</span> return locateRowInCache(tableCache, row, RegionReplicaUtil.DEFAULT_REPLICA_ID);<a name="line.609"></a> |
| <span class="sourceLineNo">610</span> }<a name="line.610"></a> |
| <span class="sourceLineNo">611</span><a name="line.611"></a> |
| <span class="sourceLineNo">612</span> // only used for testing whether we have cached the location for a table.<a name="line.612"></a> |
| <span class="sourceLineNo">613</span> int getNumberOfCachedRegionLocations(TableName tableName) {<a name="line.613"></a> |
| <span class="sourceLineNo">614</span> TableCache tableCache = cache.get(tableName);<a name="line.614"></a> |
| <span class="sourceLineNo">615</span> if (tableCache == null) {<a name="line.615"></a> |
| <span class="sourceLineNo">616</span> return 0;<a name="line.616"></a> |
| <span class="sourceLineNo">617</span> }<a name="line.617"></a> |
| <span class="sourceLineNo">618</span> return tableCache.regionLocationCache.getAll().stream()<a name="line.618"></a> |
| <span class="sourceLineNo">619</span> .mapToInt(RegionLocations::numNonNullElements).sum();<a name="line.619"></a> |
| <span class="sourceLineNo">620</span> }<a name="line.620"></a> |
| <span class="sourceLineNo">621</span>}<a name="line.621"></a> |
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| </div> |
| </body> |
| </html> |
