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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.List;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.Optional;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.hadoop.conf.Configuration;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.Cell;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HBaseTestingUtil;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HConstants;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.coprocessor.ObserverContext;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.coprocessor.RegionObserver;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.ipc.ServerTooBusyException;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.testclassification.LargeTests;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.util.Threads;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.wal.WALEdit;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.junit.AfterClass;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.junit.BeforeClass;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.junit.ClassRule;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.junit.Rule;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.junit.Test;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.junit.experimental.categories.Category;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.junit.rules.TestName;<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>/**<a name="line.48"></a>
<span class="sourceLineNo">049</span> * This class is for testing HBaseConnectionManager ServerBusyException. Be careful adding to this<a name="line.49"></a>
<span class="sourceLineNo">050</span> * class. It sets a low HBASE_CLIENT_PERSERVER_REQUESTS_THRESHOLD<a name="line.50"></a>
<span class="sourceLineNo">051</span> */<a name="line.51"></a>
<span class="sourceLineNo">052</span>@Category({ LargeTests.class })<a name="line.52"></a>
<span class="sourceLineNo">053</span>public class TestServerBusyException {<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span> @ClassRule<a name="line.55"></a>
<span class="sourceLineNo">056</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.56"></a>
<span class="sourceLineNo">057</span> HBaseClassTestRule.forClass(TestServerBusyException.class);<a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span> private final static HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();<a name="line.59"></a>
<span class="sourceLineNo">060</span> private static final byte[] FAM_NAM = Bytes.toBytes("f");<a name="line.60"></a>
<span class="sourceLineNo">061</span> private static final byte[] ROW = Bytes.toBytes("bbb");<a name="line.61"></a>
<span class="sourceLineNo">062</span> private static final int RPC_RETRY = 5;<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span> @Rule<a name="line.64"></a>
<span class="sourceLineNo">065</span> public TestName name = new TestName();<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span> public static class SleepCoprocessor implements RegionCoprocessor, RegionObserver {<a name="line.67"></a>
<span class="sourceLineNo">068</span> public static final int SLEEP_TIME = 5000;<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span> @Override<a name="line.70"></a>
<span class="sourceLineNo">071</span> public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.71"></a>
<span class="sourceLineNo">072</span> return Optional.of(this);<a name="line.72"></a>
<span class="sourceLineNo">073</span> }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span> @Override<a name="line.75"></a>
<span class="sourceLineNo">076</span> public void preGetOp(final ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, final Get get,<a name="line.76"></a>
<span class="sourceLineNo">077</span> final List&lt;Cell&gt; results) throws IOException {<a name="line.77"></a>
<span class="sourceLineNo">078</span> Threads.sleep(SLEEP_TIME);<a name="line.78"></a>
<span class="sourceLineNo">079</span> }<a name="line.79"></a>
<span class="sourceLineNo">080</span><a name="line.80"></a>
<span class="sourceLineNo">081</span> @Override<a name="line.81"></a>
<span class="sourceLineNo">082</span> public void prePut(final ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, final Put put,<a name="line.82"></a>
<span class="sourceLineNo">083</span> final WALEdit edit, final Durability durability) throws IOException {<a name="line.83"></a>
<span class="sourceLineNo">084</span> Threads.sleep(SLEEP_TIME);<a name="line.84"></a>
<span class="sourceLineNo">085</span> }<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span> @Override<a name="line.87"></a>
<span class="sourceLineNo">088</span> public Result preIncrement(final ObserverContext&lt;RegionCoprocessorEnvironment&gt; e,<a name="line.88"></a>
<span class="sourceLineNo">089</span> final Increment increment) throws IOException {<a name="line.89"></a>
<span class="sourceLineNo">090</span> Threads.sleep(SLEEP_TIME);<a name="line.90"></a>
<span class="sourceLineNo">091</span> return null;<a name="line.91"></a>
<span class="sourceLineNo">092</span> }<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span> @Override<a name="line.94"></a>
<span class="sourceLineNo">095</span> public void preDelete(final ObserverContext&lt;RegionCoprocessorEnvironment&gt; e,<a name="line.95"></a>
<span class="sourceLineNo">096</span> final Delete delete, final WALEdit edit, final Durability durability) throws IOException {<a name="line.96"></a>
<span class="sourceLineNo">097</span> Threads.sleep(SLEEP_TIME);<a name="line.97"></a>
<span class="sourceLineNo">098</span> }<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><a name="line.101"></a>
<span class="sourceLineNo">102</span> public static class SleepLongerAtFirstCoprocessor implements RegionCoprocessor, RegionObserver {<a name="line.102"></a>
<span class="sourceLineNo">103</span> public static final int SLEEP_TIME = 2000;<a name="line.103"></a>
<span class="sourceLineNo">104</span> static final AtomicLong ct = new AtomicLong(0);<a name="line.104"></a>
<span class="sourceLineNo">105</span><a name="line.105"></a>
<span class="sourceLineNo">106</span> @Override<a name="line.106"></a>
<span class="sourceLineNo">107</span> public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.107"></a>
<span class="sourceLineNo">108</span> return Optional.of(this);<a name="line.108"></a>
<span class="sourceLineNo">109</span> }<a name="line.109"></a>
<span class="sourceLineNo">110</span><a name="line.110"></a>
<span class="sourceLineNo">111</span> @Override<a name="line.111"></a>
<span class="sourceLineNo">112</span> public void preGetOp(final ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, final Get get,<a name="line.112"></a>
<span class="sourceLineNo">113</span> final List&lt;Cell&gt; results) throws IOException {<a name="line.113"></a>
<span class="sourceLineNo">114</span> // After first sleep, all requests are timeout except the last retry. If we handle<a name="line.114"></a>
<span class="sourceLineNo">115</span> // all the following requests, finally the last request is also timeout. If we drop all<a name="line.115"></a>
<span class="sourceLineNo">116</span> // timeout requests, we can handle the last request immediately and it will not timeout.<a name="line.116"></a>
<span class="sourceLineNo">117</span> if (ct.incrementAndGet() &lt;= 1) {<a name="line.117"></a>
<span class="sourceLineNo">118</span> Threads.sleep(SLEEP_TIME * RPC_RETRY * 2);<a name="line.118"></a>
<span class="sourceLineNo">119</span> } else {<a name="line.119"></a>
<span class="sourceLineNo">120</span> Threads.sleep(SLEEP_TIME);<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span> }<a name="line.122"></a>
<span class="sourceLineNo">123</span> }<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span> @BeforeClass<a name="line.125"></a>
<span class="sourceLineNo">126</span> public static void setUpBeforeClass() throws Exception {<a name="line.126"></a>
<span class="sourceLineNo">127</span> TEST_UTIL.getConfiguration().setBoolean(HConstants.STATUS_PUBLISHED, true);<a name="line.127"></a>
<span class="sourceLineNo">128</span> // Up the handlers; this test needs more than usual.<a name="line.128"></a>
<span class="sourceLineNo">129</span> TEST_UTIL.getConfiguration().setInt(HConstants.REGION_SERVER_HIGH_PRIORITY_HANDLER_COUNT, 10);<a name="line.129"></a>
<span class="sourceLineNo">130</span> TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, RPC_RETRY);<a name="line.130"></a>
<span class="sourceLineNo">131</span> // simulate queue blocking in testDropTimeoutRequest<a name="line.131"></a>
<span class="sourceLineNo">132</span> TEST_UTIL.getConfiguration().setInt(HConstants.REGION_SERVER_HANDLER_COUNT, 1);<a name="line.132"></a>
<span class="sourceLineNo">133</span> // Needed by the server busy test.<a name="line.133"></a>
<span class="sourceLineNo">134</span> TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_PERSERVER_REQUESTS_THRESHOLD, 3);<a name="line.134"></a>
<span class="sourceLineNo">135</span> TEST_UTIL.startMiniCluster(2);<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> @AfterClass<a name="line.138"></a>
<span class="sourceLineNo">139</span> public static void tearDownAfterClass() throws Exception {<a name="line.139"></a>
<span class="sourceLineNo">140</span> TEST_UTIL.shutdownMiniCluster();<a name="line.140"></a>
<span class="sourceLineNo">141</span> }<a name="line.141"></a>
<span class="sourceLineNo">142</span><a name="line.142"></a>
<span class="sourceLineNo">143</span> private static class TestPutThread extends Thread {<a name="line.143"></a>
<span class="sourceLineNo">144</span> Table table;<a name="line.144"></a>
<span class="sourceLineNo">145</span> int getServerBusyException = 0;<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span> TestPutThread(Table table) {<a name="line.147"></a>
<span class="sourceLineNo">148</span> this.table = table;<a name="line.148"></a>
<span class="sourceLineNo">149</span> }<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span> @Override<a name="line.151"></a>
<span class="sourceLineNo">152</span> public void run() {<a name="line.152"></a>
<span class="sourceLineNo">153</span> try {<a name="line.153"></a>
<span class="sourceLineNo">154</span> Put p = new Put(ROW);<a name="line.154"></a>
<span class="sourceLineNo">155</span> p.addColumn(FAM_NAM, new byte[] { 0 }, new byte[] { 0 });<a name="line.155"></a>
<span class="sourceLineNo">156</span> table.put(p);<a name="line.156"></a>
<span class="sourceLineNo">157</span> } catch (ServerTooBusyException e) {<a name="line.157"></a>
<span class="sourceLineNo">158</span> getServerBusyException = 1;<a name="line.158"></a>
<span class="sourceLineNo">159</span> } catch (IOException ignore) {<a name="line.159"></a>
<span class="sourceLineNo">160</span> }<a name="line.160"></a>
<span class="sourceLineNo">161</span> }<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> private static class TestGetThread extends Thread {<a name="line.164"></a>
<span class="sourceLineNo">165</span> Table table;<a name="line.165"></a>
<span class="sourceLineNo">166</span> int getServerBusyException = 0;<a name="line.166"></a>
<span class="sourceLineNo">167</span><a name="line.167"></a>
<span class="sourceLineNo">168</span> TestGetThread(Table table) {<a name="line.168"></a>
<span class="sourceLineNo">169</span> this.table = table;<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span> @Override<a name="line.172"></a>
<span class="sourceLineNo">173</span> public void run() {<a name="line.173"></a>
<span class="sourceLineNo">174</span> try {<a name="line.174"></a>
<span class="sourceLineNo">175</span> Get g = new Get(ROW);<a name="line.175"></a>
<span class="sourceLineNo">176</span> g.addColumn(FAM_NAM, new byte[] { 0 });<a name="line.176"></a>
<span class="sourceLineNo">177</span> table.get(g);<a name="line.177"></a>
<span class="sourceLineNo">178</span> } catch (ServerTooBusyException e) {<a name="line.178"></a>
<span class="sourceLineNo">179</span> getServerBusyException = 1;<a name="line.179"></a>
<span class="sourceLineNo">180</span> } catch (IOException ignore) {<a name="line.180"></a>
<span class="sourceLineNo">181</span> }<a name="line.181"></a>
<span class="sourceLineNo">182</span> }<a name="line.182"></a>
<span class="sourceLineNo">183</span> }<a name="line.183"></a>
<span class="sourceLineNo">184</span><a name="line.184"></a>
<span class="sourceLineNo">185</span> @Test()<a name="line.185"></a>
<span class="sourceLineNo">186</span> public void testServerBusyException() throws Exception {<a name="line.186"></a>
<span class="sourceLineNo">187</span> TableDescriptor hdt = TEST_UTIL.createModifyableTableDescriptor(name.getMethodName())<a name="line.187"></a>
<span class="sourceLineNo">188</span> .setCoprocessor(SleepCoprocessor.class.getName()).build();<a name="line.188"></a>
<span class="sourceLineNo">189</span> Configuration c = new Configuration(TEST_UTIL.getConfiguration());<a name="line.189"></a>
<span class="sourceLineNo">190</span> TEST_UTIL.createTable(hdt, new byte[][] { FAM_NAM }, c);<a name="line.190"></a>
<span class="sourceLineNo">191</span><a name="line.191"></a>
<span class="sourceLineNo">192</span> TestGetThread tg1 = new TestGetThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.192"></a>
<span class="sourceLineNo">193</span> TestGetThread tg2 = new TestGetThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.193"></a>
<span class="sourceLineNo">194</span> TestGetThread tg3 = new TestGetThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.194"></a>
<span class="sourceLineNo">195</span> TestGetThread tg4 = new TestGetThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.195"></a>
<span class="sourceLineNo">196</span> TestGetThread tg5 = new TestGetThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.196"></a>
<span class="sourceLineNo">197</span> tg1.start();<a name="line.197"></a>
<span class="sourceLineNo">198</span> tg2.start();<a name="line.198"></a>
<span class="sourceLineNo">199</span> tg3.start();<a name="line.199"></a>
<span class="sourceLineNo">200</span> tg4.start();<a name="line.200"></a>
<span class="sourceLineNo">201</span> tg5.start();<a name="line.201"></a>
<span class="sourceLineNo">202</span> tg1.join();<a name="line.202"></a>
<span class="sourceLineNo">203</span> tg2.join();<a name="line.203"></a>
<span class="sourceLineNo">204</span> tg3.join();<a name="line.204"></a>
<span class="sourceLineNo">205</span> tg4.join();<a name="line.205"></a>
<span class="sourceLineNo">206</span> tg5.join();<a name="line.206"></a>
<span class="sourceLineNo">207</span> assertEquals(2, tg1.getServerBusyException + tg2.getServerBusyException<a name="line.207"></a>
<span class="sourceLineNo">208</span> + tg3.getServerBusyException + tg4.getServerBusyException + tg5.getServerBusyException);<a name="line.208"></a>
<span class="sourceLineNo">209</span><a name="line.209"></a>
<span class="sourceLineNo">210</span> // Put has its own logic in HTable, test Put alone. We use AsyncProcess for Put (use multi at<a name="line.210"></a>
<span class="sourceLineNo">211</span> // RPC level) and it wrap exceptions to RetriesExhaustedWithDetailsException.<a name="line.211"></a>
<span class="sourceLineNo">212</span><a name="line.212"></a>
<span class="sourceLineNo">213</span> TestPutThread tp1 = new TestPutThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.213"></a>
<span class="sourceLineNo">214</span> TestPutThread tp2 = new TestPutThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.214"></a>
<span class="sourceLineNo">215</span> TestPutThread tp3 = new TestPutThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.215"></a>
<span class="sourceLineNo">216</span> TestPutThread tp4 = new TestPutThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.216"></a>
<span class="sourceLineNo">217</span> TestPutThread tp5 = new TestPutThread(TEST_UTIL.getConnection().getTable(hdt.getTableName()));<a name="line.217"></a>
<span class="sourceLineNo">218</span> tp1.start();<a name="line.218"></a>
<span class="sourceLineNo">219</span> tp2.start();<a name="line.219"></a>
<span class="sourceLineNo">220</span> tp3.start();<a name="line.220"></a>
<span class="sourceLineNo">221</span> tp4.start();<a name="line.221"></a>
<span class="sourceLineNo">222</span> tp5.start();<a name="line.222"></a>
<span class="sourceLineNo">223</span> tp1.join();<a name="line.223"></a>
<span class="sourceLineNo">224</span> tp2.join();<a name="line.224"></a>
<span class="sourceLineNo">225</span> tp3.join();<a name="line.225"></a>
<span class="sourceLineNo">226</span> tp4.join();<a name="line.226"></a>
<span class="sourceLineNo">227</span> tp5.join();<a name="line.227"></a>
<span class="sourceLineNo">228</span> assertEquals(2, tp1.getServerBusyException + tp2.getServerBusyException<a name="line.228"></a>
<span class="sourceLineNo">229</span> + tp3.getServerBusyException + tp4.getServerBusyException + tp5.getServerBusyException);<a name="line.229"></a>
<span class="sourceLineNo">230</span> }<a name="line.230"></a>
<span class="sourceLineNo">231</span>}<a name="line.231"></a>
</pre>
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