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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.coprocessor;<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.assertFalse;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.junit.Assert.assertTrue;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.junit.Assert.fail;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.io.IOException;<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 org.apache.hadoop.conf.Configuration;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.Abortable;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.CoprocessorEnvironment;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HBaseTestingUtility;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HColumnDescriptor;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.HTableDescriptor;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.MiniHBaseCluster;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.TableName;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.Admin;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.client.TableDescriptor;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.master.HMaster;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.master.MasterCoprocessorHost;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.testclassification.CoprocessorTests;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.testclassification.MediumTests;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.zookeeper.ZKNodeTracker;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.zookeeper.ZKWatcher;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.junit.AfterClass;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import org.junit.BeforeClass;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>import org.junit.ClassRule;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span>import org.junit.Test;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>import org.junit.experimental.categories.Category;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span>/**<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * Tests unhandled exceptions thrown by coprocessors running on master.<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * Expected result is that the master will remove the buggy coprocessor from<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * its set of coprocessors and throw a org.apache.hadoop.hbase.exceptions.DoNotRetryIOException<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * back to the client.<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * (HBASE-4014).<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> */<a name="line.57"></a> |
| <span class="sourceLineNo">058</span>@Category({CoprocessorTests.class, MediumTests.class})<a name="line.58"></a> |
| <span class="sourceLineNo">059</span>public class TestMasterCoprocessorExceptionWithRemove {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> @ClassRule<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> HBaseClassTestRule.forClass(TestMasterCoprocessorExceptionWithRemove.class);<a name="line.63"></a> |
| <span class="sourceLineNo">064</span><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> public static class MasterTracker extends ZKNodeTracker {<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> public boolean masterZKNodeWasDeleted = false;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> public MasterTracker(ZKWatcher zkw, String masterNode, Abortable abortable) {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> super(zkw, masterNode, abortable);<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> }<a name="line.70"></a> |
| <span class="sourceLineNo">071</span><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> @Override<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> public synchronized void nodeDeleted(String path) {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> if (path.equals("/hbase/master")) {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> masterZKNodeWasDeleted = true;<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> }<a name="line.78"></a> |
| <span class="sourceLineNo">079</span><a name="line.79"></a> |
| <span class="sourceLineNo">080</span> public static class BuggyMasterObserver implements MasterCoprocessor, MasterObserver {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> private boolean preCreateTableCalled;<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> private boolean postCreateTableCalled;<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> private boolean startCalled;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> private boolean postStartMasterCalled;<a name="line.84"></a> |
| <span class="sourceLineNo">085</span><a name="line.85"></a> |
| <span class="sourceLineNo">086</span> @Override<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> public Optional<MasterObserver> getMasterObserver() {<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> return Optional.of(this);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> }<a name="line.89"></a> |
| <span class="sourceLineNo">090</span><a name="line.90"></a> |
| <span class="sourceLineNo">091</span> @SuppressWarnings("null")<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> @Override<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> public void postCreateTable(ObserverContext<MasterCoprocessorEnvironment> env,<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> TableDescriptor desc, RegionInfo[] regions) throws IOException {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> // Cause a NullPointerException and don't catch it: this should cause the<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> // master to throw an o.apache.hadoop.hbase.DoNotRetryIOException to the<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> // client.<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> Integer i;<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> i = null;<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> i = i++;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> }<a name="line.101"></a> |
| <span class="sourceLineNo">102</span><a name="line.102"></a> |
| <span class="sourceLineNo">103</span> public boolean wasCreateTableCalled() {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> return preCreateTableCalled && postCreateTableCalled;<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> }<a name="line.105"></a> |
| <span class="sourceLineNo">106</span><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> @Override<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> public void postStartMaster(ObserverContext<MasterCoprocessorEnvironment> ctx)<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> throws IOException {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> postStartMasterCalled = true;<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> public boolean wasStartMasterCalled() {<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> return postStartMasterCalled;<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> }<a name="line.115"></a> |
| <span class="sourceLineNo">116</span><a name="line.116"></a> |
| <span class="sourceLineNo">117</span> @Override<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> public void start(CoprocessorEnvironment env) throws IOException {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> startCalled = true;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> public boolean wasStarted() {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> return startCalled;<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 HBaseTestingUtility UTIL = new HBaseTestingUtility();<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> private static byte[] TEST_TABLE1 = Bytes.toBytes("observed_table1");<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> private static byte[] TEST_FAMILY1 = Bytes.toBytes("fam1");<a name="line.130"></a> |
| <span class="sourceLineNo">131</span><a name="line.131"></a> |
| <span class="sourceLineNo">132</span> private static byte[] TEST_TABLE2 = Bytes.toBytes("table2");<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> private static byte[] TEST_FAMILY2 = Bytes.toBytes("fam2");<a name="line.133"></a> |
| <span class="sourceLineNo">134</span><a name="line.134"></a> |
| <span class="sourceLineNo">135</span> @BeforeClass<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> public static void setupBeforeClass() throws Exception {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> Configuration conf = UTIL.getConfiguration();<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> conf.set(CoprocessorHost.MASTER_COPROCESSOR_CONF_KEY,<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> BuggyMasterObserver.class.getName());<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> UTIL.getConfiguration().setBoolean(CoprocessorHost.ABORT_ON_ERROR_KEY, false);<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> UTIL.startMiniCluster();<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> }<a name="line.142"></a> |
| <span class="sourceLineNo">143</span><a name="line.143"></a> |
| <span class="sourceLineNo">144</span> @AfterClass<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> public static void teardownAfterClass() throws Exception {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> UTIL.shutdownMiniCluster();<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> }<a name="line.147"></a> |
| <span class="sourceLineNo">148</span><a name="line.148"></a> |
| <span class="sourceLineNo">149</span> @Test<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> public void testExceptionFromCoprocessorWhenCreatingTable()<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> throws IOException {<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> MiniHBaseCluster cluster = UTIL.getHBaseCluster();<a name="line.152"></a> |
| <span class="sourceLineNo">153</span><a name="line.153"></a> |
| <span class="sourceLineNo">154</span> HMaster master = cluster.getMaster();<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> MasterCoprocessorHost host = master.getMasterCoprocessorHost();<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> BuggyMasterObserver cp = host.findCoprocessor(BuggyMasterObserver.class);<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> assertFalse("No table created yet", cp.wasCreateTableCalled());<a name="line.157"></a> |
| <span class="sourceLineNo">158</span><a name="line.158"></a> |
| <span class="sourceLineNo">159</span> // Set a watch on the zookeeper /hbase/master node. If the master dies,<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> // the node will be deleted.<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> // Master should *NOT* die:<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> // we are testing that the default setting of hbase.coprocessor.abortonerror<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> // =false<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> // is respected.<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> ZKWatcher zkw = new ZKWatcher(UTIL.getConfiguration(),<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> "unittest", new Abortable() {<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> @Override<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> public void abort(String why, Throwable e) {<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> throw new RuntimeException("Fatal ZK error: " + why, e);<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> }<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> @Override<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> public boolean isAborted() {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> return false;<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> }<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> MasterTracker masterTracker = new MasterTracker(zkw,"/hbase/master",<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> new Abortable() {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> @Override<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> public void abort(String why, Throwable e) {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> throw new RuntimeException("Fatal ZooKeeper tracker error, why=", e);<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> }<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> @Override<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> public boolean isAborted() {<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> return false;<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> }<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> });<a name="line.187"></a> |
| <span class="sourceLineNo">188</span><a name="line.188"></a> |
| <span class="sourceLineNo">189</span> masterTracker.start();<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> zkw.registerListener(masterTracker);<a name="line.190"></a> |
| <span class="sourceLineNo">191</span><a name="line.191"></a> |
| <span class="sourceLineNo">192</span> // Test (part of the) output that should have be printed by master when it aborts:<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> // (namely the part that shows the set of loaded coprocessors).<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> // In this test, there is only a single coprocessor (BuggyMasterObserver).<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> String coprocessorName =<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> BuggyMasterObserver.class.getName();<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> assertTrue(HMaster.getLoadedCoprocessors().contains(coprocessorName));<a name="line.197"></a> |
| <span class="sourceLineNo">198</span><a name="line.198"></a> |
| <span class="sourceLineNo">199</span> HTableDescriptor htd1 = new HTableDescriptor(TableName.valueOf(TEST_TABLE1));<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> htd1.addFamily(new HColumnDescriptor(TEST_FAMILY1));<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> boolean threwDNRE = false;<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> try {<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> Admin admin = UTIL.getAdmin();<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> admin.createTable(htd1);<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> } catch (IOException e) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> if (e.getClass().getName().equals("org.apache.hadoop.hbase.DoNotRetryIOException")) {<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> threwDNRE = true;<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> }<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> } finally {<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> assertTrue(threwDNRE);<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> // wait for a few seconds to make sure that the Master hasn't aborted.<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> try {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> Thread.sleep(3000);<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> } catch (InterruptedException e) {<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> fail("InterruptedException while sleeping.");<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> }<a name="line.219"></a> |
| <span class="sourceLineNo">220</span><a name="line.220"></a> |
| <span class="sourceLineNo">221</span> assertFalse("Master survived coprocessor NPE, as expected.",<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> masterTracker.masterZKNodeWasDeleted);<a name="line.222"></a> |
| <span class="sourceLineNo">223</span><a name="line.223"></a> |
| <span class="sourceLineNo">224</span> String loadedCoprocessors = HMaster.getLoadedCoprocessors();<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> assertTrue(loadedCoprocessors.contains(coprocessorName));<a name="line.225"></a> |
| <span class="sourceLineNo">226</span><a name="line.226"></a> |
| <span class="sourceLineNo">227</span> // Verify that BuggyMasterObserver has been removed due to its misbehavior<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> // by creating another table: should not have a problem this time.<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> HTableDescriptor htd2 = new HTableDescriptor(TableName.valueOf(TEST_TABLE2));<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> htd2.addFamily(new HColumnDescriptor(TEST_FAMILY2));<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> Admin admin = UTIL.getAdmin();<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> try {<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> admin.createTable(htd2);<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> } catch (IOException e) {<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> fail("Failed to create table after buggy coprocessor removal: " + e);<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> }<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> }<a name="line.237"></a> |
| <span class="sourceLineNo">238</span><a name="line.238"></a> |
| <span class="sourceLineNo">239</span>}<a name="line.239"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
