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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.client.AsyncConnectionConfiguration.HBASE_CLIENT_PAUSE_FOR_SERVER_OVERLOADED;</span> |
| <span class="source-line-no">021</span><span id="line-21">import static org.junit.Assert.assertArrayEquals;</span> |
| <span class="source-line-no">022</span><span id="line-22">import static org.junit.Assert.assertNull;</span> |
| <span class="source-line-no">023</span><span id="line-23">import static org.junit.Assert.assertTrue;</span> |
| <span class="source-line-no">024</span><span id="line-24"></span> |
| <span class="source-line-no">025</span><span id="line-25">import java.io.IOException;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.ArrayList;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.List;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.concurrent.Callable;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.concurrent.CompletableFuture;</span> |
| <span class="source-line-no">030</span><span id="line-30">import java.util.concurrent.ConcurrentHashMap;</span> |
| <span class="source-line-no">031</span><span id="line-31">import java.util.concurrent.ConcurrentMap;</span> |
| <span class="source-line-no">032</span><span id="line-32">import java.util.concurrent.TimeUnit;</span> |
| <span class="source-line-no">033</span><span id="line-33">import java.util.concurrent.atomic.AtomicInteger;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.Abortable;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.HBaseClassTestRule;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.HBaseTestingUtil;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.ipc.CallRunner;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.ipc.PluggableBlockingQueue;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.ipc.PriorityFunction;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.ipc.RpcScheduler;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.ipc.SimpleRpcScheduler;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.hbase.ipc.TestPluggableQueueImpl;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.hbase.regionserver.RSRpcServices;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.hadoop.hbase.regionserver.RpcSchedulerFactory;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.hadoop.hbase.regionserver.SimpleRpcSchedulerFactory;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.hadoop.hbase.testclassification.ClientTests;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.apache.hadoop.hbase.testclassification.MediumTests;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">052</span><span id="line-52">import org.junit.After;</span> |
| <span class="source-line-no">053</span><span id="line-53">import org.junit.AfterClass;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.junit.Before;</span> |
| <span class="source-line-no">055</span><span id="line-55">import org.junit.BeforeClass;</span> |
| <span class="source-line-no">056</span><span id="line-56">import org.junit.ClassRule;</span> |
| <span class="source-line-no">057</span><span id="line-57">import org.junit.Test;</span> |
| <span class="source-line-no">058</span><span id="line-58">import org.junit.experimental.categories.Category;</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60">import org.apache.hbase.thirdparty.com.google.common.io.Closeables;</span> |
| <span class="source-line-no">061</span><span id="line-61">import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.MethodDescriptor;</span> |
| <span class="source-line-no">062</span><span id="line-62"></span> |
| <span class="source-line-no">063</span><span id="line-63">@Category({ MediumTests.class, ClientTests.class })</span> |
| <span class="source-line-no">064</span><span id="line-64">public class TestAsyncClientPauseForServerOverloaded {</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66"> @ClassRule</span> |
| <span class="source-line-no">067</span><span id="line-67"> public static final HBaseClassTestRule CLASS_RULE =</span> |
| <span class="source-line-no">068</span><span id="line-68"> HBaseClassTestRule.forClass(TestAsyncClientPauseForServerOverloaded.class);</span> |
| <span class="source-line-no">069</span><span id="line-69"></span> |
| <span class="source-line-no">070</span><span id="line-70"> private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> private static TableName TABLE_NAME = TableName.valueOf("ServerOverloaded");</span> |
| <span class="source-line-no">073</span><span id="line-73"></span> |
| <span class="source-line-no">074</span><span id="line-74"> private static byte[] FAMILY = Bytes.toBytes("Family");</span> |
| <span class="source-line-no">075</span><span id="line-75"></span> |
| <span class="source-line-no">076</span><span id="line-76"> private static byte[] QUALIFIER = Bytes.toBytes("Qualifier");</span> |
| <span class="source-line-no">077</span><span id="line-77"></span> |
| <span class="source-line-no">078</span><span id="line-78"> private static long PAUSE_FOR_SERVER_OVERLOADED_NANOS = TimeUnit.SECONDS.toNanos(1);</span> |
| <span class="source-line-no">079</span><span id="line-79"> private static long PAUSE_FOR_SERVER_OVERLOADED_MILLIS =</span> |
| <span class="source-line-no">080</span><span id="line-80"> TimeUnit.NANOSECONDS.toMillis(PAUSE_FOR_SERVER_OVERLOADED_NANOS);</span> |
| <span class="source-line-no">081</span><span id="line-81"></span> |
| <span class="source-line-no">082</span><span id="line-82"> private static AsyncConnection CONN;</span> |
| <span class="source-line-no">083</span><span id="line-83"></span> |
| <span class="source-line-no">084</span><span id="line-84"> private static volatile FailMode MODE = null;</span> |
| <span class="source-line-no">085</span><span id="line-85"></span> |
| <span class="source-line-no">086</span><span id="line-86"> enum FailMode {</span> |
| <span class="source-line-no">087</span><span id="line-87"> CALL_QUEUE_TOO_BIG,</span> |
| <span class="source-line-no">088</span><span id="line-88"> CALL_DROPPED;</span> |
| <span class="source-line-no">089</span><span id="line-89"></span> |
| <span class="source-line-no">090</span><span id="line-90"> private ConcurrentMap<MethodDescriptor, AtomicInteger> invoked = new ConcurrentHashMap<>();</span> |
| <span class="source-line-no">091</span><span id="line-91"></span> |
| <span class="source-line-no">092</span><span id="line-92"> // this is for test scan, where we will send a open scanner first and then a next, and we</span> |
| <span class="source-line-no">093</span><span id="line-93"> // expect that we hit CQTBE two times.</span> |
| <span class="source-line-no">094</span><span id="line-94"> private boolean shouldFail(CallRunner callRunner) {</span> |
| <span class="source-line-no">095</span><span id="line-95"> MethodDescriptor method = callRunner.getRpcCall().getMethod();</span> |
| <span class="source-line-no">096</span><span id="line-96"> return invoked.computeIfAbsent(method, k -> new AtomicInteger(0)).getAndIncrement() % 2 == 0;</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</span> |
| <span class="source-line-no">098</span><span id="line-98"> }</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 static final class OverloadedRpcScheduler extends SimpleRpcScheduler {</span> |
| <span class="source-line-no">101</span><span id="line-101"></span> |
| <span class="source-line-no">102</span><span id="line-102"> public OverloadedRpcScheduler(Configuration conf, int handlerCount, int priorityHandlerCount,</span> |
| <span class="source-line-no">103</span><span id="line-103"> int replicationHandlerCount, int metaTransitionHandler, PriorityFunction priority,</span> |
| <span class="source-line-no">104</span><span id="line-104"> Abortable server, int highPriorityLevel) {</span> |
| <span class="source-line-no">105</span><span id="line-105"> super(conf, handlerCount, priorityHandlerCount, replicationHandlerCount,</span> |
| <span class="source-line-no">106</span><span id="line-106"> metaTransitionHandler, priority, server, highPriorityLevel);</span> |
| <span class="source-line-no">107</span><span id="line-107"> }</span> |
| <span class="source-line-no">108</span><span id="line-108"></span> |
| <span class="source-line-no">109</span><span id="line-109"> @Override</span> |
| <span class="source-line-no">110</span><span id="line-110"> public boolean dispatch(CallRunner callTask) {</span> |
| <span class="source-line-no">111</span><span id="line-111"> if (MODE == FailMode.CALL_QUEUE_TOO_BIG && MODE.shouldFail(callTask)) {</span> |
| <span class="source-line-no">112</span><span id="line-112"> return false;</span> |
| <span class="source-line-no">113</span><span id="line-113"> }</span> |
| <span class="source-line-no">114</span><span id="line-114"> return super.dispatch(callTask);</span> |
| <span class="source-line-no">115</span><span id="line-115"> }</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117"></span> |
| <span class="source-line-no">118</span><span id="line-118"> public static final class OverloadedQueue extends TestPluggableQueueImpl {</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> public OverloadedQueue(int maxQueueLength, PriorityFunction priority, Configuration conf) {</span> |
| <span class="source-line-no">121</span><span id="line-121"> super(maxQueueLength, priority, conf);</span> |
| <span class="source-line-no">122</span><span id="line-122"> }</span> |
| <span class="source-line-no">123</span><span id="line-123"></span> |
| <span class="source-line-no">124</span><span id="line-124"> @Override</span> |
| <span class="source-line-no">125</span><span id="line-125"> public boolean offer(CallRunner callRunner) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> if (MODE == FailMode.CALL_DROPPED && MODE.shouldFail(callRunner)) {</span> |
| <span class="source-line-no">127</span><span id="line-127"> callRunner.drop();</span> |
| <span class="source-line-no">128</span><span id="line-128"> return true;</span> |
| <span class="source-line-no">129</span><span id="line-129"> }</span> |
| <span class="source-line-no">130</span><span id="line-130"> return super.offer(callRunner);</span> |
| <span class="source-line-no">131</span><span id="line-131"> }</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"></span> |
| <span class="source-line-no">134</span><span id="line-134"> public static final class OverloadedRpcSchedulerFactory extends SimpleRpcSchedulerFactory {</span> |
| <span class="source-line-no">135</span><span id="line-135"></span> |
| <span class="source-line-no">136</span><span id="line-136"> @Override</span> |
| <span class="source-line-no">137</span><span id="line-137"> public RpcScheduler create(Configuration conf, PriorityFunction priority, Abortable server) {</span> |
| <span class="source-line-no">138</span><span id="line-138"> int handlerCount = conf.getInt(HConstants.REGION_SERVER_HANDLER_COUNT,</span> |
| <span class="source-line-no">139</span><span id="line-139"> HConstants.DEFAULT_REGION_SERVER_HANDLER_COUNT);</span> |
| <span class="source-line-no">140</span><span id="line-140"> return new OverloadedRpcScheduler(conf, handlerCount,</span> |
| <span class="source-line-no">141</span><span id="line-141"> conf.getInt(HConstants.REGION_SERVER_HIGH_PRIORITY_HANDLER_COUNT,</span> |
| <span class="source-line-no">142</span><span id="line-142"> HConstants.DEFAULT_REGION_SERVER_HIGH_PRIORITY_HANDLER_COUNT),</span> |
| <span class="source-line-no">143</span><span id="line-143"> conf.getInt(HConstants.REGION_SERVER_REPLICATION_HANDLER_COUNT,</span> |
| <span class="source-line-no">144</span><span id="line-144"> HConstants.DEFAULT_REGION_SERVER_REPLICATION_HANDLER_COUNT),</span> |
| <span class="source-line-no">145</span><span id="line-145"> conf.getInt(HConstants.MASTER_META_TRANSITION_HANDLER_COUNT,</span> |
| <span class="source-line-no">146</span><span id="line-146"> HConstants.MASTER__META_TRANSITION_HANDLER_COUNT_DEFAULT),</span> |
| <span class="source-line-no">147</span><span id="line-147"> priority, server, HConstants.QOS_THRESHOLD);</span> |
| <span class="source-line-no">148</span><span id="line-148"> }</span> |
| <span class="source-line-no">149</span><span id="line-149"></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"> @BeforeClass</span> |
| <span class="source-line-no">153</span><span id="line-153"> public static void setUp() throws Exception {</span> |
| <span class="source-line-no">154</span><span id="line-154"> UTIL.getConfiguration().setLong(HConstants.HBASE_CLIENT_PAUSE, 10);</span> |
| <span class="source-line-no">155</span><span id="line-155"> UTIL.getConfiguration().set("hbase.ipc.server.callqueue.type", "pluggable");</span> |
| <span class="source-line-no">156</span><span id="line-156"> UTIL.getConfiguration().setClass("hbase.ipc.server.callqueue.pluggable.queue.class.name",</span> |
| <span class="source-line-no">157</span><span id="line-157"> OverloadedQueue.class, PluggableBlockingQueue.class);</span> |
| <span class="source-line-no">158</span><span id="line-158"> UTIL.getConfiguration().setClass(RSRpcServices.REGION_SERVER_RPC_SCHEDULER_FACTORY_CLASS,</span> |
| <span class="source-line-no">159</span><span id="line-159"> OverloadedRpcSchedulerFactory.class, RpcSchedulerFactory.class);</span> |
| <span class="source-line-no">160</span><span id="line-160"> UTIL.startMiniCluster(1);</span> |
| <span class="source-line-no">161</span><span id="line-161"></span> |
| <span class="source-line-no">162</span><span id="line-162"> Configuration conf = new Configuration(UTIL.getConfiguration());</span> |
| <span class="source-line-no">163</span><span id="line-163"> conf.setLong(HBASE_CLIENT_PAUSE_FOR_SERVER_OVERLOADED, PAUSE_FOR_SERVER_OVERLOADED_MILLIS);</span> |
| <span class="source-line-no">164</span><span id="line-164"> CONN = ConnectionFactory.createAsyncConnection(conf).get();</span> |
| <span class="source-line-no">165</span><span id="line-165"> }</span> |
| <span class="source-line-no">166</span><span id="line-166"></span> |
| <span class="source-line-no">167</span><span id="line-167"> @AfterClass</span> |
| <span class="source-line-no">168</span><span id="line-168"> public static void tearDown() throws Exception {</span> |
| <span class="source-line-no">169</span><span id="line-169"> Closeables.close(CONN, true);</span> |
| <span class="source-line-no">170</span><span id="line-170"> UTIL.shutdownMiniCluster();</span> |
| <span class="source-line-no">171</span><span id="line-171"> }</span> |
| <span class="source-line-no">172</span><span id="line-172"></span> |
| <span class="source-line-no">173</span><span id="line-173"> @Before</span> |
| <span class="source-line-no">174</span><span id="line-174"> public void setUpBeforeTest() throws IOException {</span> |
| <span class="source-line-no">175</span><span id="line-175"> try (Table table = UTIL.createTable(TABLE_NAME, FAMILY)) {</span> |
| <span class="source-line-no">176</span><span id="line-176"> for (int i = 0; i < 100; i++) {</span> |
| <span class="source-line-no">177</span><span id="line-177"> table.put(new Put(Bytes.toBytes(i)).addColumn(FAMILY, QUALIFIER, Bytes.toBytes(i)));</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"> MODE = FailMode.CALL_QUEUE_TOO_BIG;</span> |
| <span class="source-line-no">181</span><span id="line-181"> }</span> |
| <span class="source-line-no">182</span><span id="line-182"></span> |
| <span class="source-line-no">183</span><span id="line-183"> @After</span> |
| <span class="source-line-no">184</span><span id="line-184"> public void tearDownAfterTest() throws IOException {</span> |
| <span class="source-line-no">185</span><span id="line-185"> for (FailMode mode : FailMode.values()) {</span> |
| <span class="source-line-no">186</span><span id="line-186"> mode.invoked.clear();</span> |
| <span class="source-line-no">187</span><span id="line-187"> }</span> |
| <span class="source-line-no">188</span><span id="line-188"> MODE = null;</span> |
| <span class="source-line-no">189</span><span id="line-189"> UTIL.getAdmin().disableTable(TABLE_NAME);</span> |
| <span class="source-line-no">190</span><span id="line-190"> UTIL.getAdmin().deleteTable(TABLE_NAME);</span> |
| <span class="source-line-no">191</span><span id="line-191"> }</span> |
| <span class="source-line-no">192</span><span id="line-192"></span> |
| <span class="source-line-no">193</span><span id="line-193"> private void assertTime(Callable<Void> callable, long time) throws Exception {</span> |
| <span class="source-line-no">194</span><span id="line-194"> for (FailMode mode : FailMode.values()) {</span> |
| <span class="source-line-no">195</span><span id="line-195"> MODE = mode;</span> |
| <span class="source-line-no">196</span><span id="line-196"></span> |
| <span class="source-line-no">197</span><span id="line-197"> long startNs = System.nanoTime();</span> |
| <span class="source-line-no">198</span><span id="line-198"> callable.call();</span> |
| <span class="source-line-no">199</span><span id="line-199"> long costNs = System.nanoTime() - startNs;</span> |
| <span class="source-line-no">200</span><span id="line-200"> assertTrue(costNs > time);</span> |
| <span class="source-line-no">201</span><span id="line-201"> }</span> |
| <span class="source-line-no">202</span><span id="line-202"> }</span> |
| <span class="source-line-no">203</span><span id="line-203"></span> |
| <span class="source-line-no">204</span><span id="line-204"> @Test</span> |
| <span class="source-line-no">205</span><span id="line-205"> public void testGet() throws Exception {</span> |
| <span class="source-line-no">206</span><span id="line-206"> assertTime(() -> {</span> |
| <span class="source-line-no">207</span><span id="line-207"> Result result = CONN.getTable(TABLE_NAME).get(new Get(Bytes.toBytes(0))).get();</span> |
| <span class="source-line-no">208</span><span id="line-208"> assertArrayEquals(Bytes.toBytes(0), result.getValue(FAMILY, QUALIFIER));</span> |
| <span class="source-line-no">209</span><span id="line-209"> return null;</span> |
| <span class="source-line-no">210</span><span id="line-210"> }, PAUSE_FOR_SERVER_OVERLOADED_NANOS);</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"> @Test</span> |
| <span class="source-line-no">214</span><span id="line-214"> public void testBatch() throws Exception {</span> |
| <span class="source-line-no">215</span><span id="line-215"> assertTime(() -> {</span> |
| <span class="source-line-no">216</span><span id="line-216"> List<CompletableFuture<?>> futures = new ArrayList<>();</span> |
| <span class="source-line-no">217</span><span id="line-217"> try (AsyncBufferedMutator mutator = CONN.getBufferedMutator(TABLE_NAME)) {</span> |
| <span class="source-line-no">218</span><span id="line-218"> for (int i = 100; i < 110; i++) {</span> |
| <span class="source-line-no">219</span><span id="line-219"> futures.add(mutator</span> |
| <span class="source-line-no">220</span><span id="line-220"> .mutate(new Put(Bytes.toBytes(i)).addColumn(FAMILY, QUALIFIER, Bytes.toBytes(i))));</span> |
| <span class="source-line-no">221</span><span id="line-221"> }</span> |
| <span class="source-line-no">222</span><span id="line-222"> }</span> |
| <span class="source-line-no">223</span><span id="line-223"> return CompletableFuture.allOf(futures.toArray(new CompletableFuture[0])).get();</span> |
| <span class="source-line-no">224</span><span id="line-224"> }, PAUSE_FOR_SERVER_OVERLOADED_NANOS);</span> |
| <span class="source-line-no">225</span><span id="line-225"> }</span> |
| <span class="source-line-no">226</span><span id="line-226"></span> |
| <span class="source-line-no">227</span><span id="line-227"> @Test</span> |
| <span class="source-line-no">228</span><span id="line-228"> public void testScan() throws Exception {</span> |
| <span class="source-line-no">229</span><span id="line-229"> // we will hit CallQueueTooBigException two times so the sleep time should be twice</span> |
| <span class="source-line-no">230</span><span id="line-230"> assertTime(() -> {</span> |
| <span class="source-line-no">231</span><span id="line-231"> try (</span> |
| <span class="source-line-no">232</span><span id="line-232"> ResultScanner scanner = CONN.getTable(TABLE_NAME).getScanner(new Scan().setCaching(80))) {</span> |
| <span class="source-line-no">233</span><span id="line-233"> for (int i = 0; i < 100; i++) {</span> |
| <span class="source-line-no">234</span><span id="line-234"> Result result = scanner.next();</span> |
| <span class="source-line-no">235</span><span id="line-235"> assertArrayEquals(Bytes.toBytes(i), result.getValue(FAMILY, QUALIFIER));</span> |
| <span class="source-line-no">236</span><span id="line-236"> }</span> |
| <span class="source-line-no">237</span><span id="line-237"> assertNull(scanner.next());</span> |
| <span class="source-line-no">238</span><span id="line-238"> }</span> |
| <span class="source-line-no">239</span><span id="line-239"> return null;</span> |
| <span class="source-line-no">240</span><span id="line-240"> }, PAUSE_FOR_SERVER_OVERLOADED_NANOS * 2);</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
