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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.junit.Assert.assertEquals;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.IOException;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Arrays;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.Optional;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.ConcurrentMap;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.concurrent.ForkJoinPool;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.function.Supplier;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.Cell;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.HBaseTestingUtil;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.TableName;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.coprocessor.ObserverContext;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.coprocessor.RegionObserver;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.junit.AfterClass;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.junit.Rule;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.junit.Test;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.junit.rules.TestName;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.junit.runners.Parameterized.Parameter;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.junit.runners.Parameterized.Parameters;<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>import org.apache.hbase.thirdparty.com.google.common.io.Closeables;<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span>public abstract class AbstractTestAsyncTableRegionReplicasRead {<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span> protected static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span> protected static TableName TABLE_NAME = TableName.valueOf("async");<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span> protected static byte[] FAMILY = Bytes.toBytes("cf");<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span> protected static byte[] QUALIFIER = Bytes.toBytes("cq");<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> protected static byte[] ROW = Bytes.toBytes("row");<a name="line.60"></a>
<span class="sourceLineNo">061</span><a name="line.61"></a>
<span class="sourceLineNo">062</span> protected static byte[] VALUE = Bytes.toBytes("value");<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span> protected static int REPLICA_COUNT = 3;<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span> protected static AsyncConnection ASYNC_CONN;<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span> @Rule<a name="line.68"></a>
<span class="sourceLineNo">069</span> public TestName testName = new TestName();<a name="line.69"></a>
<span class="sourceLineNo">070</span><a name="line.70"></a>
<span class="sourceLineNo">071</span> @Parameter<a name="line.71"></a>
<span class="sourceLineNo">072</span> public Supplier&lt;AsyncTable&lt;?&gt;&gt; getTable;<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span> private static AsyncTable&lt;?&gt; getRawTable() {<a name="line.74"></a>
<span class="sourceLineNo">075</span> return ASYNC_CONN.getTable(TABLE_NAME);<a name="line.75"></a>
<span class="sourceLineNo">076</span> }<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span> private static AsyncTable&lt;?&gt; getTable() {<a name="line.78"></a>
<span class="sourceLineNo">079</span> return ASYNC_CONN.getTable(TABLE_NAME, ForkJoinPool.commonPool());<a name="line.79"></a>
<span class="sourceLineNo">080</span> }<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span> @Parameters<a name="line.82"></a>
<span class="sourceLineNo">083</span> public static List&lt;Object[]&gt; params() {<a name="line.83"></a>
<span class="sourceLineNo">084</span> return Arrays.asList(<a name="line.84"></a>
<span class="sourceLineNo">085</span> new Supplier&lt;?&gt;[] { AbstractTestAsyncTableRegionReplicasRead::getRawTable },<a name="line.85"></a>
<span class="sourceLineNo">086</span> new Supplier&lt;?&gt;[] { AbstractTestAsyncTableRegionReplicasRead::getTable });<a name="line.86"></a>
<span class="sourceLineNo">087</span> }<a name="line.87"></a>
<span class="sourceLineNo">088</span><a name="line.88"></a>
<span class="sourceLineNo">089</span> protected static volatile boolean FAIL_PRIMARY_GET = false;<a name="line.89"></a>
<span class="sourceLineNo">090</span><a name="line.90"></a>
<span class="sourceLineNo">091</span> protected static ConcurrentMap&lt;Integer, AtomicInteger&gt; REPLICA_ID_TO_COUNT =<a name="line.91"></a>
<span class="sourceLineNo">092</span> new ConcurrentHashMap&lt;&gt;();<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span> public static final class FailPrimaryGetCP implements RegionObserver, RegionCoprocessor {<a name="line.94"></a>
<span class="sourceLineNo">095</span><a name="line.95"></a>
<span class="sourceLineNo">096</span> @Override<a name="line.96"></a>
<span class="sourceLineNo">097</span> public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.97"></a>
<span class="sourceLineNo">098</span> return Optional.of(this);<a name="line.98"></a>
<span class="sourceLineNo">099</span> }<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span> private void recordAndTryFail(ObserverContext&lt;RegionCoprocessorEnvironment&gt; c)<a name="line.101"></a>
<span class="sourceLineNo">102</span> throws IOException {<a name="line.102"></a>
<span class="sourceLineNo">103</span> RegionInfo region = c.getEnvironment().getRegionInfo();<a name="line.103"></a>
<span class="sourceLineNo">104</span> if (!region.getTable().equals(TABLE_NAME)) {<a name="line.104"></a>
<span class="sourceLineNo">105</span> return;<a name="line.105"></a>
<span class="sourceLineNo">106</span> }<a name="line.106"></a>
<span class="sourceLineNo">107</span> REPLICA_ID_TO_COUNT.computeIfAbsent(region.getReplicaId(), k -&gt; new AtomicInteger())<a name="line.107"></a>
<span class="sourceLineNo">108</span> .incrementAndGet();<a name="line.108"></a>
<span class="sourceLineNo">109</span> if (region.getReplicaId() == RegionReplicaUtil.DEFAULT_REPLICA_ID &amp;&amp; FAIL_PRIMARY_GET) {<a name="line.109"></a>
<span class="sourceLineNo">110</span> throw new IOException("Inject error");<a name="line.110"></a>
<span class="sourceLineNo">111</span> }<a name="line.111"></a>
<span class="sourceLineNo">112</span> }<a name="line.112"></a>
<span class="sourceLineNo">113</span><a name="line.113"></a>
<span class="sourceLineNo">114</span> @Override<a name="line.114"></a>
<span class="sourceLineNo">115</span> public void preGetOp(ObserverContext&lt;RegionCoprocessorEnvironment&gt; c, Get get,<a name="line.115"></a>
<span class="sourceLineNo">116</span> List&lt;Cell&gt; result) throws IOException {<a name="line.116"></a>
<span class="sourceLineNo">117</span> recordAndTryFail(c);<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> @Override<a name="line.120"></a>
<span class="sourceLineNo">121</span> public void preScannerOpen(ObserverContext&lt;RegionCoprocessorEnvironment&gt; c, Scan scan)<a name="line.121"></a>
<span class="sourceLineNo">122</span> throws IOException {<a name="line.122"></a>
<span class="sourceLineNo">123</span> recordAndTryFail(c);<a name="line.123"></a>
<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span> }<a name="line.125"></a>
<span class="sourceLineNo">126</span><a name="line.126"></a>
<span class="sourceLineNo">127</span> private static boolean allReplicasHaveRow(byte[] row) throws IOException {<a name="line.127"></a>
<span class="sourceLineNo">128</span> for (RegionServerThread t : TEST_UTIL.getMiniHBaseCluster().getRegionServerThreads()) {<a name="line.128"></a>
<span class="sourceLineNo">129</span> for (HRegion region : t.getRegionServer().getRegions(TABLE_NAME)) {<a name="line.129"></a>
<span class="sourceLineNo">130</span> if (region.get(new Get(row), false).isEmpty()) {<a name="line.130"></a>
<span class="sourceLineNo">131</span> return false;<a name="line.131"></a>
<span class="sourceLineNo">132</span> }<a name="line.132"></a>
<span class="sourceLineNo">133</span> }<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span> return true;<a name="line.135"></a>
<span class="sourceLineNo">136</span> }<a name="line.136"></a>
<span class="sourceLineNo">137</span><a name="line.137"></a>
<span class="sourceLineNo">138</span> protected static void startClusterAndCreateTable() throws Exception {<a name="line.138"></a>
<span class="sourceLineNo">139</span> TEST_UTIL.startMiniCluster(3);<a name="line.139"></a>
<span class="sourceLineNo">140</span> TEST_UTIL.getAdmin().createTable(TableDescriptorBuilder.newBuilder(TABLE_NAME)<a name="line.140"></a>
<span class="sourceLineNo">141</span> .setColumnFamily(ColumnFamilyDescriptorBuilder.of(FAMILY)).setRegionReplication(REPLICA_COUNT)<a name="line.141"></a>
<span class="sourceLineNo">142</span> .setCoprocessor(FailPrimaryGetCP.class.getName()).build());<a name="line.142"></a>
<span class="sourceLineNo">143</span> TEST_UTIL.waitUntilAllRegionsAssigned(TABLE_NAME);<a name="line.143"></a>
<span class="sourceLineNo">144</span> ASYNC_CONN = ConnectionFactory.createAsyncConnection(TEST_UTIL.getConfiguration()).get();<a name="line.144"></a>
<span class="sourceLineNo">145</span> }<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span> protected static void waitUntilAllReplicasHaveRow(byte[] row) throws IOException {<a name="line.147"></a>
<span class="sourceLineNo">148</span> // this is the fastest way to let all replicas have the row<a name="line.148"></a>
<span class="sourceLineNo">149</span> TEST_UTIL.getAdmin().disableTable(TABLE_NAME);<a name="line.149"></a>
<span class="sourceLineNo">150</span> TEST_UTIL.getAdmin().enableTable(TABLE_NAME);<a name="line.150"></a>
<span class="sourceLineNo">151</span> TEST_UTIL.waitFor(30000, () -&gt; allReplicasHaveRow(row));<a name="line.151"></a>
<span class="sourceLineNo">152</span> }<a name="line.152"></a>
<span class="sourceLineNo">153</span><a name="line.153"></a>
<span class="sourceLineNo">154</span> @AfterClass<a name="line.154"></a>
<span class="sourceLineNo">155</span> public static void tearDownAfterClass() throws Exception {<a name="line.155"></a>
<span class="sourceLineNo">156</span> Closeables.close(ASYNC_CONN, true);<a name="line.156"></a>
<span class="sourceLineNo">157</span> TEST_UTIL.shutdownMiniCluster();<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> protected static int getSecondaryGetCount() {<a name="line.160"></a>
<span class="sourceLineNo">161</span> return REPLICA_ID_TO_COUNT.entrySet().stream()<a name="line.161"></a>
<span class="sourceLineNo">162</span> .filter(e -&gt; e.getKey().intValue() != RegionReplicaUtil.DEFAULT_REPLICA_ID)<a name="line.162"></a>
<span class="sourceLineNo">163</span> .mapToInt(e -&gt; e.getValue().get()).sum();<a name="line.163"></a>
<span class="sourceLineNo">164</span> }<a name="line.164"></a>
<span class="sourceLineNo">165</span><a name="line.165"></a>
<span class="sourceLineNo">166</span> protected static int getPrimaryGetCount() {<a name="line.166"></a>
<span class="sourceLineNo">167</span> AtomicInteger primaryGetCount = REPLICA_ID_TO_COUNT.get(RegionReplicaUtil.DEFAULT_REPLICA_ID);<a name="line.167"></a>
<span class="sourceLineNo">168</span> return primaryGetCount != null ? primaryGetCount.get() : 0;<a name="line.168"></a>
<span class="sourceLineNo">169</span> }<a name="line.169"></a>
<span class="sourceLineNo">170</span><a name="line.170"></a>
<span class="sourceLineNo">171</span> // replicaId = -1 means do not set replica<a name="line.171"></a>
<span class="sourceLineNo">172</span> protected abstract void readAndCheck(AsyncTable&lt;?&gt; table, int replicaId) throws Exception;<a name="line.172"></a>
<span class="sourceLineNo">173</span><a name="line.173"></a>
<span class="sourceLineNo">174</span> @Test<a name="line.174"></a>
<span class="sourceLineNo">175</span> public void testNoReplicaRead() throws Exception {<a name="line.175"></a>
<span class="sourceLineNo">176</span> FAIL_PRIMARY_GET = false;<a name="line.176"></a>
<span class="sourceLineNo">177</span> REPLICA_ID_TO_COUNT.clear();<a name="line.177"></a>
<span class="sourceLineNo">178</span> AsyncTable&lt;?&gt; table = getTable.get();<a name="line.178"></a>
<span class="sourceLineNo">179</span> readAndCheck(table, -1);<a name="line.179"></a>
<span class="sourceLineNo">180</span> // the primary region is fine and the primary timeout is 1 second which is long enough, so we<a name="line.180"></a>
<span class="sourceLineNo">181</span> // should not send any requests to secondary replicas even if the consistency is timeline.<a name="line.181"></a>
<span class="sourceLineNo">182</span> Thread.sleep(5000);<a name="line.182"></a>
<span class="sourceLineNo">183</span> assertEquals(0, getSecondaryGetCount());<a name="line.183"></a>
<span class="sourceLineNo">184</span> }<a name="line.184"></a>
<span class="sourceLineNo">185</span><a name="line.185"></a>
<span class="sourceLineNo">186</span> @Test<a name="line.186"></a>
<span class="sourceLineNo">187</span> public void testReplicaRead() throws Exception {<a name="line.187"></a>
<span class="sourceLineNo">188</span> // fail the primary get request<a name="line.188"></a>
<span class="sourceLineNo">189</span> FAIL_PRIMARY_GET = true;<a name="line.189"></a>
<span class="sourceLineNo">190</span> REPLICA_ID_TO_COUNT.clear();<a name="line.190"></a>
<span class="sourceLineNo">191</span> // make sure that we could still get the value from secondary replicas<a name="line.191"></a>
<span class="sourceLineNo">192</span> AsyncTable&lt;?&gt; table = getTable.get();<a name="line.192"></a>
<span class="sourceLineNo">193</span> readAndCheck(table, -1);<a name="line.193"></a>
<span class="sourceLineNo">194</span> // make sure that the primary request has been canceled<a name="line.194"></a>
<span class="sourceLineNo">195</span> Thread.sleep(5000);<a name="line.195"></a>
<span class="sourceLineNo">196</span> int count = getPrimaryGetCount();<a name="line.196"></a>
<span class="sourceLineNo">197</span> Thread.sleep(10000);<a name="line.197"></a>
<span class="sourceLineNo">198</span> assertEquals(count, getPrimaryGetCount());<a name="line.198"></a>
<span class="sourceLineNo">199</span> }<a name="line.199"></a>
<span class="sourceLineNo">200</span><a name="line.200"></a>
<span class="sourceLineNo">201</span> @Test<a name="line.201"></a>
<span class="sourceLineNo">202</span> public void testReadSpecificReplica() throws Exception {<a name="line.202"></a>
<span class="sourceLineNo">203</span> FAIL_PRIMARY_GET = false;<a name="line.203"></a>
<span class="sourceLineNo">204</span> REPLICA_ID_TO_COUNT.clear();<a name="line.204"></a>
<span class="sourceLineNo">205</span> AsyncTable&lt;?&gt; table = getTable.get();<a name="line.205"></a>
<span class="sourceLineNo">206</span> for (int replicaId = 0; replicaId &lt; REPLICA_COUNT; replicaId++) {<a name="line.206"></a>
<span class="sourceLineNo">207</span> readAndCheck(table, replicaId);<a name="line.207"></a>
<span class="sourceLineNo">208</span> assertEquals(1, REPLICA_ID_TO_COUNT.get(replicaId).get());<a name="line.208"></a>
<span class="sourceLineNo">209</span> }<a name="line.209"></a>
<span class="sourceLineNo">210</span> }<a name="line.210"></a>
<span class="sourceLineNo">211</span>}<a name="line.211"></a>
</pre>
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