http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1f43e8de/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.ExchangeProcedure.html
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd";>
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" 
title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.procedure2;<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>import static 
org.junit.Assert.assertTrue;<a name="line.21"></a>
+<span class="sourceLineNo">022</span><a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.io.IOException;<a 
name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.HashMap;<a 
name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.Map;<a 
name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.concurrent.Exchanger;<a 
name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.Path;<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.HBaseCommonTestingUtility;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import 
org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility.NoopProcedure;<a 
name="line.30"></a>
+<span class="sourceLineNo">031</span>import 
org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;<a 
name="line.31"></a>
+<span class="sourceLineNo">032</span>import 
org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import 
org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.junit.After;<a 
name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.junit.AfterClass;<a 
name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.junit.Before;<a 
name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.junit.BeforeClass;<a 
name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.junit.ClassRule;<a 
name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.junit.Rule;<a 
name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.junit.Test;<a 
name="line.40"></a>
+<span class="sourceLineNo">041</span>import 
org.junit.experimental.categories.Category;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.junit.rules.TestName;<a 
name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span>import 
org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureState;<a
 name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span>@Category({ MasterTests.class, 
SmallTests.class })<a name="line.46"></a>
+<span class="sourceLineNo">047</span>public class TestForceUpdateProcedure {<a 
name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span>  @ClassRule<a name="line.49"></a>
+<span class="sourceLineNo">050</span>  public static final HBaseClassTestRule 
CLASS_RULE =<a name="line.50"></a>
+<span class="sourceLineNo">051</span>    
HBaseClassTestRule.forClass(TestForceUpdateProcedure.class);<a 
name="line.51"></a>
+<span class="sourceLineNo">052</span><a name="line.52"></a>
+<span class="sourceLineNo">053</span>  private static 
HBaseCommonTestingUtility UTIL = new HBaseCommonTestingUtility();<a 
name="line.53"></a>
+<span class="sourceLineNo">054</span><a name="line.54"></a>
+<span class="sourceLineNo">055</span>  private static WALProcedureStore 
STORE;<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>  private static 
ProcedureExecutor&lt;Void&gt; EXEC;<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span>  private static Exchanger&lt;Boolean&gt; 
EXCHANGER = new Exchanger&lt;&gt;();<a name="line.59"></a>
+<span class="sourceLineNo">060</span><a name="line.60"></a>
+<span class="sourceLineNo">061</span>  private static int WAL_COUNT = 5;<a 
name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>  @Rule<a name="line.63"></a>
+<span class="sourceLineNo">064</span>  public final TestName name = new 
TestName();<a name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span>  private void createStoreAndExecutor() 
throws IOException {<a name="line.66"></a>
+<span class="sourceLineNo">067</span>    
UTIL.getConfiguration().setInt(CompletedProcedureCleaner.CLEANER_INTERVAL_CONF_KEY,
 1000);<a name="line.67"></a>
+<span class="sourceLineNo">068</span>    Path logDir = 
UTIL.getDataTestDir(name.getMethodName());<a name="line.68"></a>
+<span class="sourceLineNo">069</span>    STORE = 
ProcedureTestingUtility.createWalStore(UTIL.getConfiguration(), logDir);<a 
name="line.69"></a>
+<span class="sourceLineNo">070</span>    STORE.start(1);<a name="line.70"></a>
+<span class="sourceLineNo">071</span>    EXEC = new 
ProcedureExecutor&lt;Void&gt;(UTIL.getConfiguration(), null, STORE);<a 
name="line.71"></a>
+<span class="sourceLineNo">072</span>    
ProcedureTestingUtility.initAndStartWorkers(EXEC, 1, true);<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>  @BeforeClass<a name="line.75"></a>
+<span class="sourceLineNo">076</span>  public static void setUpBeforeClass() 
throws IOException {<a name="line.76"></a>
+<span class="sourceLineNo">077</span>    
UTIL.getConfiguration().setInt(WALProcedureStore.WAL_COUNT_WARN_THRESHOLD_CONF_KEY,
 WAL_COUNT);<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>  private void stopStoreAndExecutor() {<a 
name="line.80"></a>
+<span class="sourceLineNo">081</span>    EXEC.stop();<a name="line.81"></a>
+<span class="sourceLineNo">082</span>    STORE.stop(false);<a 
name="line.82"></a>
+<span class="sourceLineNo">083</span>    EXEC = null;<a name="line.83"></a>
+<span class="sourceLineNo">084</span>    STORE = null;<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>  @AfterClass<a name="line.87"></a>
+<span class="sourceLineNo">088</span>  public static void tearDownAfterClass() 
throws IOException {<a name="line.88"></a>
+<span class="sourceLineNo">089</span>    UTIL.cleanupTestDir();<a 
name="line.89"></a>
+<span class="sourceLineNo">090</span>  }<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span>  @Before<a name="line.92"></a>
+<span class="sourceLineNo">093</span>  public void setUp() throws IOException 
{<a name="line.93"></a>
+<span class="sourceLineNo">094</span>    createStoreAndExecutor();<a 
name="line.94"></a>
+<span class="sourceLineNo">095</span>  }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span>  @After<a name="line.97"></a>
+<span class="sourceLineNo">098</span>  public void tearDown() {<a 
name="line.98"></a>
+<span class="sourceLineNo">099</span>    stopStoreAndExecutor();<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 final class 
WaitingProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.102"></a>
+<span class="sourceLineNo">103</span><a name="line.103"></a>
+<span class="sourceLineNo">104</span>    @Override<a name="line.104"></a>
+<span class="sourceLineNo">105</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.105"></a>
+<span class="sourceLineNo">106</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.106"></a>
+<span class="sourceLineNo">107</span>      EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.107"></a>
+<span class="sourceLineNo">108</span>      
setState(ProcedureState.WAITING_TIMEOUT);<a name="line.108"></a>
+<span class="sourceLineNo">109</span>      setTimeout(Integer.MAX_VALUE);<a 
name="line.109"></a>
+<span class="sourceLineNo">110</span>      throw new 
ProcedureSuspendedException();<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>  public static final class 
ParentProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span>    @SuppressWarnings("unchecked")<a 
name="line.116"></a>
+<span class="sourceLineNo">117</span>    @Override<a name="line.117"></a>
+<span class="sourceLineNo">118</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.118"></a>
+<span class="sourceLineNo">119</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.119"></a>
+<span class="sourceLineNo">120</span>      return new Procedure[] { new 
NoopProcedure&lt;&gt;(), new WaitingProcedure() };<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>  public static final class 
ExchangeProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span>    @SuppressWarnings("unchecked")<a 
name="line.126"></a>
+<span class="sourceLineNo">127</span>    @Override<a name="line.127"></a>
+<span class="sourceLineNo">128</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.128"></a>
+<span class="sourceLineNo">129</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.129"></a>
+<span class="sourceLineNo">130</span>      if 
(EXCHANGER.exchange(Boolean.TRUE)) {<a name="line.130"></a>
+<span class="sourceLineNo">131</span>        return new Procedure[] { this 
};<a name="line.131"></a>
+<span class="sourceLineNo">132</span>      } else {<a name="line.132"></a>
+<span class="sourceLineNo">133</span>        return null;<a 
name="line.133"></a>
+<span class="sourceLineNo">134</span>      }<a name="line.134"></a>
+<span class="sourceLineNo">135</span>    }<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>  public static final class 
NoopNoAckProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.138"></a>
+<span class="sourceLineNo">139</span><a name="line.139"></a>
+<span class="sourceLineNo">140</span>    @Override<a name="line.140"></a>
+<span class="sourceLineNo">141</span>    protected boolean 
shouldWaitClientAck(Void env) {<a name="line.141"></a>
+<span class="sourceLineNo">142</span>      return false;<a name="line.142"></a>
+<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
+<span class="sourceLineNo">144</span>  }<a name="line.144"></a>
+<span class="sourceLineNo">145</span><a name="line.145"></a>
+<span class="sourceLineNo">146</span>  @Test<a name="line.146"></a>
+<span class="sourceLineNo">147</span>  public void testProcedureStuck() throws 
IOException, InterruptedException {<a name="line.147"></a>
+<span class="sourceLineNo">148</span>    EXEC.submitProcedure(new 
ParentProcedure());<a name="line.148"></a>
+<span class="sourceLineNo">149</span>    EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.149"></a>
+<span class="sourceLineNo">150</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.getActiveExecutorCount() == 0);<a name="line.150"></a>
+<span class="sourceLineNo">151</span>    // The above operations are used to 
make sure that we have persist the states of the two<a name="line.151"></a>
+<span class="sourceLineNo">152</span>    // procedures.<a name="line.152"></a>
+<span class="sourceLineNo">153</span>    long procId = 
EXEC.submitProcedure(new ExchangeProcedure());<a name="line.153"></a>
+<span class="sourceLineNo">154</span>    assertEquals(1, 
STORE.getActiveLogs().size());<a name="line.154"></a>
+<span class="sourceLineNo">155</span>    for (int i = 0; i &lt; WAL_COUNT - 1; 
i++) {<a name="line.155"></a>
+<span class="sourceLineNo">156</span>      
assertTrue(STORE.rollWriterForTesting());<a name="line.156"></a>
+<span class="sourceLineNo">157</span>      // The WaitinProcedure never gets 
updated so we can not delete the oldest wal file, so the<a name="line.157"></a>
+<span class="sourceLineNo">158</span>      // number of wal files will 
increase<a name="line.158"></a>
+<span class="sourceLineNo">159</span>      assertEquals(2 + i, 
STORE.getActiveLogs().size());<a name="line.159"></a>
+<span class="sourceLineNo">160</span>      EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.160"></a>
+<span class="sourceLineNo">161</span>      Thread.sleep(1000);<a 
name="line.161"></a>
+<span class="sourceLineNo">162</span>    }<a name="line.162"></a>
+<span class="sourceLineNo">163</span>    STORE.rollWriterForTesting();<a 
name="line.163"></a>
+<span class="sourceLineNo">164</span>    // Finish the ExchangeProcedure<a 
name="line.164"></a>
+<span class="sourceLineNo">165</span>    EXCHANGER.exchange(Boolean.FALSE);<a 
name="line.165"></a>
+<span class="sourceLineNo">166</span>    // Make sure that we can delete 
several wal files because we force update the state of<a name="line.166"></a>
+<span class="sourceLineNo">167</span>    // WaitingProcedure. Notice that the 
last closed wal files can not be deleted, as when rolling<a name="line.167"></a>
+<span class="sourceLineNo">168</span>    // the newest wal file does not have 
anything in it, and in the closed file we still have the<a name="line.168"></a>
+<span class="sourceLineNo">169</span>    // state for the ExchangeProcedure so 
it can not be deleted<a name="line.169"></a>
+<span class="sourceLineNo">170</span>    UTIL.waitFor(10000, () -&gt; 
STORE.getActiveLogs().size() &lt;= 2);<a name="line.170"></a>
+<span class="sourceLineNo">171</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(procId));<a name="line.171"></a>
+<span class="sourceLineNo">172</span>    // Make sure that after the force 
update we could still load the procedures<a name="line.172"></a>
+<span class="sourceLineNo">173</span>    stopStoreAndExecutor();<a 
name="line.173"></a>
+<span class="sourceLineNo">174</span>    createStoreAndExecutor();<a 
name="line.174"></a>
+<span class="sourceLineNo">175</span>    Map&lt;Class&lt;?&gt;, 
Procedure&lt;Void&gt;&gt; procMap = new HashMap&lt;&gt;();<a 
name="line.175"></a>
+<span class="sourceLineNo">176</span>    
EXEC.getActiveProceduresNoCopy().forEach(p -&gt; procMap.put(p.getClass(), 
p));<a name="line.176"></a>
+<span class="sourceLineNo">177</span>    assertEquals(3, procMap.size());<a 
name="line.177"></a>
+<span class="sourceLineNo">178</span>    ParentProcedure parentProc = 
(ParentProcedure) procMap.get(ParentProcedure.class);<a name="line.178"></a>
+<span class="sourceLineNo">179</span>    assertEquals(ProcedureState.WAITING, 
parentProc.getState());<a name="line.179"></a>
+<span class="sourceLineNo">180</span>    WaitingProcedure waitingProc = 
(WaitingProcedure) procMap.get(WaitingProcedure.class);<a name="line.180"></a>
+<span class="sourceLineNo">181</span>    
assertEquals(ProcedureState.WAITING_TIMEOUT, waitingProc.getState());<a 
name="line.181"></a>
+<span class="sourceLineNo">182</span>    NoopProcedure&lt;Void&gt; noopProc = 
(NoopProcedure&lt;Void&gt;) procMap.get(NoopProcedure.class);<a 
name="line.182"></a>
+<span class="sourceLineNo">183</span>    assertEquals(ProcedureState.SUCCESS, 
noopProc.getState());<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 testCompletedProcedure() 
throws InterruptedException, IOException {<a name="line.187"></a>
+<span class="sourceLineNo">188</span>    long procId = 
EXEC.submitProcedure(new ExchangeProcedure());<a name="line.188"></a>
+<span class="sourceLineNo">189</span>    EXCHANGER.exchange(Boolean.FALSE);<a 
name="line.189"></a>
+<span class="sourceLineNo">190</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(procId));<a name="line.190"></a>
+<span class="sourceLineNo">191</span>    for (int i = 0; i &lt; WAL_COUNT - 1; 
i++) {<a name="line.191"></a>
+<span class="sourceLineNo">192</span>      
assertTrue(STORE.rollWriterForTesting());<a name="line.192"></a>
+<span class="sourceLineNo">193</span>      // The exchange procedure is 
completed but still not deleted yet so we can not delete the<a 
name="line.193"></a>
+<span class="sourceLineNo">194</span>      // oldest wal file<a 
name="line.194"></a>
+<span class="sourceLineNo">195</span>      long pid = EXEC.submitProcedure(new 
NoopNoAckProcedure());<a name="line.195"></a>
+<span class="sourceLineNo">196</span>      assertEquals(2 + i, 
STORE.getActiveLogs().size());<a name="line.196"></a>
+<span class="sourceLineNo">197</span>      UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(pid));<a name="line.197"></a>
+<span class="sourceLineNo">198</span>    }<a name="line.198"></a>
+<span class="sourceLineNo">199</span>    // Only the exchange procedure can 
not be deleted<a name="line.199"></a>
+<span class="sourceLineNo">200</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.getCompletedSize() == 1);<a name="line.200"></a>
+<span class="sourceLineNo">201</span>    STORE.rollWriterForTesting();<a 
name="line.201"></a>
+<span class="sourceLineNo">202</span>    UTIL.waitFor(10000, () -&gt; 
STORE.getActiveLogs().size() &lt;= 1);<a name="line.202"></a>
+<span class="sourceLineNo">203</span>  }<a name="line.203"></a>
+<span class="sourceLineNo">204</span>}<a name="line.204"></a>
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+</pre>
+</div>
+</body>
+</html>

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1f43e8de/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.NoopNoAckProcedure.html
----------------------------------------------------------------------
diff --git 
a/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.NoopNoAckProcedure.html
 
b/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.NoopNoAckProcedure.html
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd";>
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" 
title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.procedure2;<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>import static 
org.junit.Assert.assertTrue;<a name="line.21"></a>
+<span class="sourceLineNo">022</span><a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.io.IOException;<a 
name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.HashMap;<a 
name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.Map;<a 
name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.concurrent.Exchanger;<a 
name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.Path;<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.HBaseCommonTestingUtility;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import 
org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility.NoopProcedure;<a 
name="line.30"></a>
+<span class="sourceLineNo">031</span>import 
org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;<a 
name="line.31"></a>
+<span class="sourceLineNo">032</span>import 
org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import 
org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.junit.After;<a 
name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.junit.AfterClass;<a 
name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.junit.Before;<a 
name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.junit.BeforeClass;<a 
name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.junit.ClassRule;<a 
name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.junit.Rule;<a 
name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.junit.Test;<a 
name="line.40"></a>
+<span class="sourceLineNo">041</span>import 
org.junit.experimental.categories.Category;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.junit.rules.TestName;<a 
name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span>import 
org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureState;<a
 name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span>@Category({ MasterTests.class, 
SmallTests.class })<a name="line.46"></a>
+<span class="sourceLineNo">047</span>public class TestForceUpdateProcedure {<a 
name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span>  @ClassRule<a name="line.49"></a>
+<span class="sourceLineNo">050</span>  public static final HBaseClassTestRule 
CLASS_RULE =<a name="line.50"></a>
+<span class="sourceLineNo">051</span>    
HBaseClassTestRule.forClass(TestForceUpdateProcedure.class);<a 
name="line.51"></a>
+<span class="sourceLineNo">052</span><a name="line.52"></a>
+<span class="sourceLineNo">053</span>  private static 
HBaseCommonTestingUtility UTIL = new HBaseCommonTestingUtility();<a 
name="line.53"></a>
+<span class="sourceLineNo">054</span><a name="line.54"></a>
+<span class="sourceLineNo">055</span>  private static WALProcedureStore 
STORE;<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>  private static 
ProcedureExecutor&lt;Void&gt; EXEC;<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span>  private static Exchanger&lt;Boolean&gt; 
EXCHANGER = new Exchanger&lt;&gt;();<a name="line.59"></a>
+<span class="sourceLineNo">060</span><a name="line.60"></a>
+<span class="sourceLineNo">061</span>  private static int WAL_COUNT = 5;<a 
name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>  @Rule<a name="line.63"></a>
+<span class="sourceLineNo">064</span>  public final TestName name = new 
TestName();<a name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span>  private void createStoreAndExecutor() 
throws IOException {<a name="line.66"></a>
+<span class="sourceLineNo">067</span>    
UTIL.getConfiguration().setInt(CompletedProcedureCleaner.CLEANER_INTERVAL_CONF_KEY,
 1000);<a name="line.67"></a>
+<span class="sourceLineNo">068</span>    Path logDir = 
UTIL.getDataTestDir(name.getMethodName());<a name="line.68"></a>
+<span class="sourceLineNo">069</span>    STORE = 
ProcedureTestingUtility.createWalStore(UTIL.getConfiguration(), logDir);<a 
name="line.69"></a>
+<span class="sourceLineNo">070</span>    STORE.start(1);<a name="line.70"></a>
+<span class="sourceLineNo">071</span>    EXEC = new 
ProcedureExecutor&lt;Void&gt;(UTIL.getConfiguration(), null, STORE);<a 
name="line.71"></a>
+<span class="sourceLineNo">072</span>    
ProcedureTestingUtility.initAndStartWorkers(EXEC, 1, true);<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>  @BeforeClass<a name="line.75"></a>
+<span class="sourceLineNo">076</span>  public static void setUpBeforeClass() 
throws IOException {<a name="line.76"></a>
+<span class="sourceLineNo">077</span>    
UTIL.getConfiguration().setInt(WALProcedureStore.WAL_COUNT_WARN_THRESHOLD_CONF_KEY,
 WAL_COUNT);<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>  private void stopStoreAndExecutor() {<a 
name="line.80"></a>
+<span class="sourceLineNo">081</span>    EXEC.stop();<a name="line.81"></a>
+<span class="sourceLineNo">082</span>    STORE.stop(false);<a 
name="line.82"></a>
+<span class="sourceLineNo">083</span>    EXEC = null;<a name="line.83"></a>
+<span class="sourceLineNo">084</span>    STORE = null;<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>  @AfterClass<a name="line.87"></a>
+<span class="sourceLineNo">088</span>  public static void tearDownAfterClass() 
throws IOException {<a name="line.88"></a>
+<span class="sourceLineNo">089</span>    UTIL.cleanupTestDir();<a 
name="line.89"></a>
+<span class="sourceLineNo">090</span>  }<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span>  @Before<a name="line.92"></a>
+<span class="sourceLineNo">093</span>  public void setUp() throws IOException 
{<a name="line.93"></a>
+<span class="sourceLineNo">094</span>    createStoreAndExecutor();<a 
name="line.94"></a>
+<span class="sourceLineNo">095</span>  }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span>  @After<a name="line.97"></a>
+<span class="sourceLineNo">098</span>  public void tearDown() {<a 
name="line.98"></a>
+<span class="sourceLineNo">099</span>    stopStoreAndExecutor();<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 final class 
WaitingProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.102"></a>
+<span class="sourceLineNo">103</span><a name="line.103"></a>
+<span class="sourceLineNo">104</span>    @Override<a name="line.104"></a>
+<span class="sourceLineNo">105</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.105"></a>
+<span class="sourceLineNo">106</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.106"></a>
+<span class="sourceLineNo">107</span>      EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.107"></a>
+<span class="sourceLineNo">108</span>      
setState(ProcedureState.WAITING_TIMEOUT);<a name="line.108"></a>
+<span class="sourceLineNo">109</span>      setTimeout(Integer.MAX_VALUE);<a 
name="line.109"></a>
+<span class="sourceLineNo">110</span>      throw new 
ProcedureSuspendedException();<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>  public static final class 
ParentProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span>    @SuppressWarnings("unchecked")<a 
name="line.116"></a>
+<span class="sourceLineNo">117</span>    @Override<a name="line.117"></a>
+<span class="sourceLineNo">118</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.118"></a>
+<span class="sourceLineNo">119</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.119"></a>
+<span class="sourceLineNo">120</span>      return new Procedure[] { new 
NoopProcedure&lt;&gt;(), new WaitingProcedure() };<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>  public static final class 
ExchangeProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span>    @SuppressWarnings("unchecked")<a 
name="line.126"></a>
+<span class="sourceLineNo">127</span>    @Override<a name="line.127"></a>
+<span class="sourceLineNo">128</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.128"></a>
+<span class="sourceLineNo">129</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.129"></a>
+<span class="sourceLineNo">130</span>      if 
(EXCHANGER.exchange(Boolean.TRUE)) {<a name="line.130"></a>
+<span class="sourceLineNo">131</span>        return new Procedure[] { this 
};<a name="line.131"></a>
+<span class="sourceLineNo">132</span>      } else {<a name="line.132"></a>
+<span class="sourceLineNo">133</span>        return null;<a 
name="line.133"></a>
+<span class="sourceLineNo">134</span>      }<a name="line.134"></a>
+<span class="sourceLineNo">135</span>    }<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>  public static final class 
NoopNoAckProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.138"></a>
+<span class="sourceLineNo">139</span><a name="line.139"></a>
+<span class="sourceLineNo">140</span>    @Override<a name="line.140"></a>
+<span class="sourceLineNo">141</span>    protected boolean 
shouldWaitClientAck(Void env) {<a name="line.141"></a>
+<span class="sourceLineNo">142</span>      return false;<a name="line.142"></a>
+<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
+<span class="sourceLineNo">144</span>  }<a name="line.144"></a>
+<span class="sourceLineNo">145</span><a name="line.145"></a>
+<span class="sourceLineNo">146</span>  @Test<a name="line.146"></a>
+<span class="sourceLineNo">147</span>  public void testProcedureStuck() throws 
IOException, InterruptedException {<a name="line.147"></a>
+<span class="sourceLineNo">148</span>    EXEC.submitProcedure(new 
ParentProcedure());<a name="line.148"></a>
+<span class="sourceLineNo">149</span>    EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.149"></a>
+<span class="sourceLineNo">150</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.getActiveExecutorCount() == 0);<a name="line.150"></a>
+<span class="sourceLineNo">151</span>    // The above operations are used to 
make sure that we have persist the states of the two<a name="line.151"></a>
+<span class="sourceLineNo">152</span>    // procedures.<a name="line.152"></a>
+<span class="sourceLineNo">153</span>    long procId = 
EXEC.submitProcedure(new ExchangeProcedure());<a name="line.153"></a>
+<span class="sourceLineNo">154</span>    assertEquals(1, 
STORE.getActiveLogs().size());<a name="line.154"></a>
+<span class="sourceLineNo">155</span>    for (int i = 0; i &lt; WAL_COUNT - 1; 
i++) {<a name="line.155"></a>
+<span class="sourceLineNo">156</span>      
assertTrue(STORE.rollWriterForTesting());<a name="line.156"></a>
+<span class="sourceLineNo">157</span>      // The WaitinProcedure never gets 
updated so we can not delete the oldest wal file, so the<a name="line.157"></a>
+<span class="sourceLineNo">158</span>      // number of wal files will 
increase<a name="line.158"></a>
+<span class="sourceLineNo">159</span>      assertEquals(2 + i, 
STORE.getActiveLogs().size());<a name="line.159"></a>
+<span class="sourceLineNo">160</span>      EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.160"></a>
+<span class="sourceLineNo">161</span>      Thread.sleep(1000);<a 
name="line.161"></a>
+<span class="sourceLineNo">162</span>    }<a name="line.162"></a>
+<span class="sourceLineNo">163</span>    STORE.rollWriterForTesting();<a 
name="line.163"></a>
+<span class="sourceLineNo">164</span>    // Finish the ExchangeProcedure<a 
name="line.164"></a>
+<span class="sourceLineNo">165</span>    EXCHANGER.exchange(Boolean.FALSE);<a 
name="line.165"></a>
+<span class="sourceLineNo">166</span>    // Make sure that we can delete 
several wal files because we force update the state of<a name="line.166"></a>
+<span class="sourceLineNo">167</span>    // WaitingProcedure. Notice that the 
last closed wal files can not be deleted, as when rolling<a name="line.167"></a>
+<span class="sourceLineNo">168</span>    // the newest wal file does not have 
anything in it, and in the closed file we still have the<a name="line.168"></a>
+<span class="sourceLineNo">169</span>    // state for the ExchangeProcedure so 
it can not be deleted<a name="line.169"></a>
+<span class="sourceLineNo">170</span>    UTIL.waitFor(10000, () -&gt; 
STORE.getActiveLogs().size() &lt;= 2);<a name="line.170"></a>
+<span class="sourceLineNo">171</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(procId));<a name="line.171"></a>
+<span class="sourceLineNo">172</span>    // Make sure that after the force 
update we could still load the procedures<a name="line.172"></a>
+<span class="sourceLineNo">173</span>    stopStoreAndExecutor();<a 
name="line.173"></a>
+<span class="sourceLineNo">174</span>    createStoreAndExecutor();<a 
name="line.174"></a>
+<span class="sourceLineNo">175</span>    Map&lt;Class&lt;?&gt;, 
Procedure&lt;Void&gt;&gt; procMap = new HashMap&lt;&gt;();<a 
name="line.175"></a>
+<span class="sourceLineNo">176</span>    
EXEC.getActiveProceduresNoCopy().forEach(p -&gt; procMap.put(p.getClass(), 
p));<a name="line.176"></a>
+<span class="sourceLineNo">177</span>    assertEquals(3, procMap.size());<a 
name="line.177"></a>
+<span class="sourceLineNo">178</span>    ParentProcedure parentProc = 
(ParentProcedure) procMap.get(ParentProcedure.class);<a name="line.178"></a>
+<span class="sourceLineNo">179</span>    assertEquals(ProcedureState.WAITING, 
parentProc.getState());<a name="line.179"></a>
+<span class="sourceLineNo">180</span>    WaitingProcedure waitingProc = 
(WaitingProcedure) procMap.get(WaitingProcedure.class);<a name="line.180"></a>
+<span class="sourceLineNo">181</span>    
assertEquals(ProcedureState.WAITING_TIMEOUT, waitingProc.getState());<a 
name="line.181"></a>
+<span class="sourceLineNo">182</span>    NoopProcedure&lt;Void&gt; noopProc = 
(NoopProcedure&lt;Void&gt;) procMap.get(NoopProcedure.class);<a 
name="line.182"></a>
+<span class="sourceLineNo">183</span>    assertEquals(ProcedureState.SUCCESS, 
noopProc.getState());<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 testCompletedProcedure() 
throws InterruptedException, IOException {<a name="line.187"></a>
+<span class="sourceLineNo">188</span>    long procId = 
EXEC.submitProcedure(new ExchangeProcedure());<a name="line.188"></a>
+<span class="sourceLineNo">189</span>    EXCHANGER.exchange(Boolean.FALSE);<a 
name="line.189"></a>
+<span class="sourceLineNo">190</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(procId));<a name="line.190"></a>
+<span class="sourceLineNo">191</span>    for (int i = 0; i &lt; WAL_COUNT - 1; 
i++) {<a name="line.191"></a>
+<span class="sourceLineNo">192</span>      
assertTrue(STORE.rollWriterForTesting());<a name="line.192"></a>
+<span class="sourceLineNo">193</span>      // The exchange procedure is 
completed but still not deleted yet so we can not delete the<a 
name="line.193"></a>
+<span class="sourceLineNo">194</span>      // oldest wal file<a 
name="line.194"></a>
+<span class="sourceLineNo">195</span>      long pid = EXEC.submitProcedure(new 
NoopNoAckProcedure());<a name="line.195"></a>
+<span class="sourceLineNo">196</span>      assertEquals(2 + i, 
STORE.getActiveLogs().size());<a name="line.196"></a>
+<span class="sourceLineNo">197</span>      UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(pid));<a name="line.197"></a>
+<span class="sourceLineNo">198</span>    }<a name="line.198"></a>
+<span class="sourceLineNo">199</span>    // Only the exchange procedure can 
not be deleted<a name="line.199"></a>
+<span class="sourceLineNo">200</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.getCompletedSize() == 1);<a name="line.200"></a>
+<span class="sourceLineNo">201</span>    STORE.rollWriterForTesting();<a 
name="line.201"></a>
+<span class="sourceLineNo">202</span>    UTIL.waitFor(10000, () -&gt; 
STORE.getActiveLogs().size() &lt;= 1);<a name="line.202"></a>
+<span class="sourceLineNo">203</span>  }<a name="line.203"></a>
+<span class="sourceLineNo">204</span>}<a name="line.204"></a>
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+</pre>
+</div>
+</body>
+</html>

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1f43e8de/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.ParentProcedure.html
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diff --git 
a/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.ParentProcedure.html
 
b/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.ParentProcedure.html
new file mode 100644
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b/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.ParentProcedure.html
@@ -0,0 +1,276 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd";>
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" 
title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.procedure2;<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>import static 
org.junit.Assert.assertTrue;<a name="line.21"></a>
+<span class="sourceLineNo">022</span><a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.io.IOException;<a 
name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.HashMap;<a 
name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.Map;<a 
name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.concurrent.Exchanger;<a 
name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.Path;<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.HBaseCommonTestingUtility;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import 
org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility.NoopProcedure;<a 
name="line.30"></a>
+<span class="sourceLineNo">031</span>import 
org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;<a 
name="line.31"></a>
+<span class="sourceLineNo">032</span>import 
org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import 
org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.junit.After;<a 
name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.junit.AfterClass;<a 
name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.junit.Before;<a 
name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.junit.BeforeClass;<a 
name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.junit.ClassRule;<a 
name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.junit.Rule;<a 
name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.junit.Test;<a 
name="line.40"></a>
+<span class="sourceLineNo">041</span>import 
org.junit.experimental.categories.Category;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.junit.rules.TestName;<a 
name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span>import 
org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureState;<a
 name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span>@Category({ MasterTests.class, 
SmallTests.class })<a name="line.46"></a>
+<span class="sourceLineNo">047</span>public class TestForceUpdateProcedure {<a 
name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span>  @ClassRule<a name="line.49"></a>
+<span class="sourceLineNo">050</span>  public static final HBaseClassTestRule 
CLASS_RULE =<a name="line.50"></a>
+<span class="sourceLineNo">051</span>    
HBaseClassTestRule.forClass(TestForceUpdateProcedure.class);<a 
name="line.51"></a>
+<span class="sourceLineNo">052</span><a name="line.52"></a>
+<span class="sourceLineNo">053</span>  private static 
HBaseCommonTestingUtility UTIL = new HBaseCommonTestingUtility();<a 
name="line.53"></a>
+<span class="sourceLineNo">054</span><a name="line.54"></a>
+<span class="sourceLineNo">055</span>  private static WALProcedureStore 
STORE;<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>  private static 
ProcedureExecutor&lt;Void&gt; EXEC;<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span>  private static Exchanger&lt;Boolean&gt; 
EXCHANGER = new Exchanger&lt;&gt;();<a name="line.59"></a>
+<span class="sourceLineNo">060</span><a name="line.60"></a>
+<span class="sourceLineNo">061</span>  private static int WAL_COUNT = 5;<a 
name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>  @Rule<a name="line.63"></a>
+<span class="sourceLineNo">064</span>  public final TestName name = new 
TestName();<a name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span>  private void createStoreAndExecutor() 
throws IOException {<a name="line.66"></a>
+<span class="sourceLineNo">067</span>    
UTIL.getConfiguration().setInt(CompletedProcedureCleaner.CLEANER_INTERVAL_CONF_KEY,
 1000);<a name="line.67"></a>
+<span class="sourceLineNo">068</span>    Path logDir = 
UTIL.getDataTestDir(name.getMethodName());<a name="line.68"></a>
+<span class="sourceLineNo">069</span>    STORE = 
ProcedureTestingUtility.createWalStore(UTIL.getConfiguration(), logDir);<a 
name="line.69"></a>
+<span class="sourceLineNo">070</span>    STORE.start(1);<a name="line.70"></a>
+<span class="sourceLineNo">071</span>    EXEC = new 
ProcedureExecutor&lt;Void&gt;(UTIL.getConfiguration(), null, STORE);<a 
name="line.71"></a>
+<span class="sourceLineNo">072</span>    
ProcedureTestingUtility.initAndStartWorkers(EXEC, 1, true);<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>  @BeforeClass<a name="line.75"></a>
+<span class="sourceLineNo">076</span>  public static void setUpBeforeClass() 
throws IOException {<a name="line.76"></a>
+<span class="sourceLineNo">077</span>    
UTIL.getConfiguration().setInt(WALProcedureStore.WAL_COUNT_WARN_THRESHOLD_CONF_KEY,
 WAL_COUNT);<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>  private void stopStoreAndExecutor() {<a 
name="line.80"></a>
+<span class="sourceLineNo">081</span>    EXEC.stop();<a name="line.81"></a>
+<span class="sourceLineNo">082</span>    STORE.stop(false);<a 
name="line.82"></a>
+<span class="sourceLineNo">083</span>    EXEC = null;<a name="line.83"></a>
+<span class="sourceLineNo">084</span>    STORE = null;<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>  @AfterClass<a name="line.87"></a>
+<span class="sourceLineNo">088</span>  public static void tearDownAfterClass() 
throws IOException {<a name="line.88"></a>
+<span class="sourceLineNo">089</span>    UTIL.cleanupTestDir();<a 
name="line.89"></a>
+<span class="sourceLineNo">090</span>  }<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span>  @Before<a name="line.92"></a>
+<span class="sourceLineNo">093</span>  public void setUp() throws IOException 
{<a name="line.93"></a>
+<span class="sourceLineNo">094</span>    createStoreAndExecutor();<a 
name="line.94"></a>
+<span class="sourceLineNo">095</span>  }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span>  @After<a name="line.97"></a>
+<span class="sourceLineNo">098</span>  public void tearDown() {<a 
name="line.98"></a>
+<span class="sourceLineNo">099</span>    stopStoreAndExecutor();<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 final class 
WaitingProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.102"></a>
+<span class="sourceLineNo">103</span><a name="line.103"></a>
+<span class="sourceLineNo">104</span>    @Override<a name="line.104"></a>
+<span class="sourceLineNo">105</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.105"></a>
+<span class="sourceLineNo">106</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.106"></a>
+<span class="sourceLineNo">107</span>      EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.107"></a>
+<span class="sourceLineNo">108</span>      
setState(ProcedureState.WAITING_TIMEOUT);<a name="line.108"></a>
+<span class="sourceLineNo">109</span>      setTimeout(Integer.MAX_VALUE);<a 
name="line.109"></a>
+<span class="sourceLineNo">110</span>      throw new 
ProcedureSuspendedException();<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>  public static final class 
ParentProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span>    @SuppressWarnings("unchecked")<a 
name="line.116"></a>
+<span class="sourceLineNo">117</span>    @Override<a name="line.117"></a>
+<span class="sourceLineNo">118</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.118"></a>
+<span class="sourceLineNo">119</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.119"></a>
+<span class="sourceLineNo">120</span>      return new Procedure[] { new 
NoopProcedure&lt;&gt;(), new WaitingProcedure() };<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>  public static final class 
ExchangeProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span>    @SuppressWarnings("unchecked")<a 
name="line.126"></a>
+<span class="sourceLineNo">127</span>    @Override<a name="line.127"></a>
+<span class="sourceLineNo">128</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.128"></a>
+<span class="sourceLineNo">129</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.129"></a>
+<span class="sourceLineNo">130</span>      if 
(EXCHANGER.exchange(Boolean.TRUE)) {<a name="line.130"></a>
+<span class="sourceLineNo">131</span>        return new Procedure[] { this 
};<a name="line.131"></a>
+<span class="sourceLineNo">132</span>      } else {<a name="line.132"></a>
+<span class="sourceLineNo">133</span>        return null;<a 
name="line.133"></a>
+<span class="sourceLineNo">134</span>      }<a name="line.134"></a>
+<span class="sourceLineNo">135</span>    }<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>  public static final class 
NoopNoAckProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.138"></a>
+<span class="sourceLineNo">139</span><a name="line.139"></a>
+<span class="sourceLineNo">140</span>    @Override<a name="line.140"></a>
+<span class="sourceLineNo">141</span>    protected boolean 
shouldWaitClientAck(Void env) {<a name="line.141"></a>
+<span class="sourceLineNo">142</span>      return false;<a name="line.142"></a>
+<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
+<span class="sourceLineNo">144</span>  }<a name="line.144"></a>
+<span class="sourceLineNo">145</span><a name="line.145"></a>
+<span class="sourceLineNo">146</span>  @Test<a name="line.146"></a>
+<span class="sourceLineNo">147</span>  public void testProcedureStuck() throws 
IOException, InterruptedException {<a name="line.147"></a>
+<span class="sourceLineNo">148</span>    EXEC.submitProcedure(new 
ParentProcedure());<a name="line.148"></a>
+<span class="sourceLineNo">149</span>    EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.149"></a>
+<span class="sourceLineNo">150</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.getActiveExecutorCount() == 0);<a name="line.150"></a>
+<span class="sourceLineNo">151</span>    // The above operations are used to 
make sure that we have persist the states of the two<a name="line.151"></a>
+<span class="sourceLineNo">152</span>    // procedures.<a name="line.152"></a>
+<span class="sourceLineNo">153</span>    long procId = 
EXEC.submitProcedure(new ExchangeProcedure());<a name="line.153"></a>
+<span class="sourceLineNo">154</span>    assertEquals(1, 
STORE.getActiveLogs().size());<a name="line.154"></a>
+<span class="sourceLineNo">155</span>    for (int i = 0; i &lt; WAL_COUNT - 1; 
i++) {<a name="line.155"></a>
+<span class="sourceLineNo">156</span>      
assertTrue(STORE.rollWriterForTesting());<a name="line.156"></a>
+<span class="sourceLineNo">157</span>      // The WaitinProcedure never gets 
updated so we can not delete the oldest wal file, so the<a name="line.157"></a>
+<span class="sourceLineNo">158</span>      // number of wal files will 
increase<a name="line.158"></a>
+<span class="sourceLineNo">159</span>      assertEquals(2 + i, 
STORE.getActiveLogs().size());<a name="line.159"></a>
+<span class="sourceLineNo">160</span>      EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.160"></a>
+<span class="sourceLineNo">161</span>      Thread.sleep(1000);<a 
name="line.161"></a>
+<span class="sourceLineNo">162</span>    }<a name="line.162"></a>
+<span class="sourceLineNo">163</span>    STORE.rollWriterForTesting();<a 
name="line.163"></a>
+<span class="sourceLineNo">164</span>    // Finish the ExchangeProcedure<a 
name="line.164"></a>
+<span class="sourceLineNo">165</span>    EXCHANGER.exchange(Boolean.FALSE);<a 
name="line.165"></a>
+<span class="sourceLineNo">166</span>    // Make sure that we can delete 
several wal files because we force update the state of<a name="line.166"></a>
+<span class="sourceLineNo">167</span>    // WaitingProcedure. Notice that the 
last closed wal files can not be deleted, as when rolling<a name="line.167"></a>
+<span class="sourceLineNo">168</span>    // the newest wal file does not have 
anything in it, and in the closed file we still have the<a name="line.168"></a>
+<span class="sourceLineNo">169</span>    // state for the ExchangeProcedure so 
it can not be deleted<a name="line.169"></a>
+<span class="sourceLineNo">170</span>    UTIL.waitFor(10000, () -&gt; 
STORE.getActiveLogs().size() &lt;= 2);<a name="line.170"></a>
+<span class="sourceLineNo">171</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(procId));<a name="line.171"></a>
+<span class="sourceLineNo">172</span>    // Make sure that after the force 
update we could still load the procedures<a name="line.172"></a>
+<span class="sourceLineNo">173</span>    stopStoreAndExecutor();<a 
name="line.173"></a>
+<span class="sourceLineNo">174</span>    createStoreAndExecutor();<a 
name="line.174"></a>
+<span class="sourceLineNo">175</span>    Map&lt;Class&lt;?&gt;, 
Procedure&lt;Void&gt;&gt; procMap = new HashMap&lt;&gt;();<a 
name="line.175"></a>
+<span class="sourceLineNo">176</span>    
EXEC.getActiveProceduresNoCopy().forEach(p -&gt; procMap.put(p.getClass(), 
p));<a name="line.176"></a>
+<span class="sourceLineNo">177</span>    assertEquals(3, procMap.size());<a 
name="line.177"></a>
+<span class="sourceLineNo">178</span>    ParentProcedure parentProc = 
(ParentProcedure) procMap.get(ParentProcedure.class);<a name="line.178"></a>
+<span class="sourceLineNo">179</span>    assertEquals(ProcedureState.WAITING, 
parentProc.getState());<a name="line.179"></a>
+<span class="sourceLineNo">180</span>    WaitingProcedure waitingProc = 
(WaitingProcedure) procMap.get(WaitingProcedure.class);<a name="line.180"></a>
+<span class="sourceLineNo">181</span>    
assertEquals(ProcedureState.WAITING_TIMEOUT, waitingProc.getState());<a 
name="line.181"></a>
+<span class="sourceLineNo">182</span>    NoopProcedure&lt;Void&gt; noopProc = 
(NoopProcedure&lt;Void&gt;) procMap.get(NoopProcedure.class);<a 
name="line.182"></a>
+<span class="sourceLineNo">183</span>    assertEquals(ProcedureState.SUCCESS, 
noopProc.getState());<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 testCompletedProcedure() 
throws InterruptedException, IOException {<a name="line.187"></a>
+<span class="sourceLineNo">188</span>    long procId = 
EXEC.submitProcedure(new ExchangeProcedure());<a name="line.188"></a>
+<span class="sourceLineNo">189</span>    EXCHANGER.exchange(Boolean.FALSE);<a 
name="line.189"></a>
+<span class="sourceLineNo">190</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(procId));<a name="line.190"></a>
+<span class="sourceLineNo">191</span>    for (int i = 0; i &lt; WAL_COUNT - 1; 
i++) {<a name="line.191"></a>
+<span class="sourceLineNo">192</span>      
assertTrue(STORE.rollWriterForTesting());<a name="line.192"></a>
+<span class="sourceLineNo">193</span>      // The exchange procedure is 
completed but still not deleted yet so we can not delete the<a 
name="line.193"></a>
+<span class="sourceLineNo">194</span>      // oldest wal file<a 
name="line.194"></a>
+<span class="sourceLineNo">195</span>      long pid = EXEC.submitProcedure(new 
NoopNoAckProcedure());<a name="line.195"></a>
+<span class="sourceLineNo">196</span>      assertEquals(2 + i, 
STORE.getActiveLogs().size());<a name="line.196"></a>
+<span class="sourceLineNo">197</span>      UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(pid));<a name="line.197"></a>
+<span class="sourceLineNo">198</span>    }<a name="line.198"></a>
+<span class="sourceLineNo">199</span>    // Only the exchange procedure can 
not be deleted<a name="line.199"></a>
+<span class="sourceLineNo">200</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.getCompletedSize() == 1);<a name="line.200"></a>
+<span class="sourceLineNo">201</span>    STORE.rollWriterForTesting();<a 
name="line.201"></a>
+<span class="sourceLineNo">202</span>    UTIL.waitFor(10000, () -&gt; 
STORE.getActiveLogs().size() &lt;= 1);<a name="line.202"></a>
+<span class="sourceLineNo">203</span>  }<a name="line.203"></a>
+<span class="sourceLineNo">204</span>}<a name="line.204"></a>
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+</pre>
+</div>
+</body>
+</html>

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1f43e8de/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.WaitingProcedure.html
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diff --git 
a/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.WaitingProcedure.html
 
b/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.WaitingProcedure.html
new file mode 100644
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+++ 
b/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestForceUpdateProcedure.WaitingProcedure.html
@@ -0,0 +1,276 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd";>
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" 
title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.procedure2;<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>import static 
org.junit.Assert.assertTrue;<a name="line.21"></a>
+<span class="sourceLineNo">022</span><a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.io.IOException;<a 
name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.HashMap;<a 
name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.Map;<a 
name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.concurrent.Exchanger;<a 
name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.Path;<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.HBaseCommonTestingUtility;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import 
org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility.NoopProcedure;<a 
name="line.30"></a>
+<span class="sourceLineNo">031</span>import 
org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;<a 
name="line.31"></a>
+<span class="sourceLineNo">032</span>import 
org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import 
org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.junit.After;<a 
name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.junit.AfterClass;<a 
name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.junit.Before;<a 
name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.junit.BeforeClass;<a 
name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.junit.ClassRule;<a 
name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.junit.Rule;<a 
name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.junit.Test;<a 
name="line.40"></a>
+<span class="sourceLineNo">041</span>import 
org.junit.experimental.categories.Category;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.junit.rules.TestName;<a 
name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span>import 
org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureState;<a
 name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span>@Category({ MasterTests.class, 
SmallTests.class })<a name="line.46"></a>
+<span class="sourceLineNo">047</span>public class TestForceUpdateProcedure {<a 
name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span>  @ClassRule<a name="line.49"></a>
+<span class="sourceLineNo">050</span>  public static final HBaseClassTestRule 
CLASS_RULE =<a name="line.50"></a>
+<span class="sourceLineNo">051</span>    
HBaseClassTestRule.forClass(TestForceUpdateProcedure.class);<a 
name="line.51"></a>
+<span class="sourceLineNo">052</span><a name="line.52"></a>
+<span class="sourceLineNo">053</span>  private static 
HBaseCommonTestingUtility UTIL = new HBaseCommonTestingUtility();<a 
name="line.53"></a>
+<span class="sourceLineNo">054</span><a name="line.54"></a>
+<span class="sourceLineNo">055</span>  private static WALProcedureStore 
STORE;<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>  private static 
ProcedureExecutor&lt;Void&gt; EXEC;<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span>  private static Exchanger&lt;Boolean&gt; 
EXCHANGER = new Exchanger&lt;&gt;();<a name="line.59"></a>
+<span class="sourceLineNo">060</span><a name="line.60"></a>
+<span class="sourceLineNo">061</span>  private static int WAL_COUNT = 5;<a 
name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>  @Rule<a name="line.63"></a>
+<span class="sourceLineNo">064</span>  public final TestName name = new 
TestName();<a name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span>  private void createStoreAndExecutor() 
throws IOException {<a name="line.66"></a>
+<span class="sourceLineNo">067</span>    
UTIL.getConfiguration().setInt(CompletedProcedureCleaner.CLEANER_INTERVAL_CONF_KEY,
 1000);<a name="line.67"></a>
+<span class="sourceLineNo">068</span>    Path logDir = 
UTIL.getDataTestDir(name.getMethodName());<a name="line.68"></a>
+<span class="sourceLineNo">069</span>    STORE = 
ProcedureTestingUtility.createWalStore(UTIL.getConfiguration(), logDir);<a 
name="line.69"></a>
+<span class="sourceLineNo">070</span>    STORE.start(1);<a name="line.70"></a>
+<span class="sourceLineNo">071</span>    EXEC = new 
ProcedureExecutor&lt;Void&gt;(UTIL.getConfiguration(), null, STORE);<a 
name="line.71"></a>
+<span class="sourceLineNo">072</span>    
ProcedureTestingUtility.initAndStartWorkers(EXEC, 1, true);<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>  @BeforeClass<a name="line.75"></a>
+<span class="sourceLineNo">076</span>  public static void setUpBeforeClass() 
throws IOException {<a name="line.76"></a>
+<span class="sourceLineNo">077</span>    
UTIL.getConfiguration().setInt(WALProcedureStore.WAL_COUNT_WARN_THRESHOLD_CONF_KEY,
 WAL_COUNT);<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>  private void stopStoreAndExecutor() {<a 
name="line.80"></a>
+<span class="sourceLineNo">081</span>    EXEC.stop();<a name="line.81"></a>
+<span class="sourceLineNo">082</span>    STORE.stop(false);<a 
name="line.82"></a>
+<span class="sourceLineNo">083</span>    EXEC = null;<a name="line.83"></a>
+<span class="sourceLineNo">084</span>    STORE = null;<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>  @AfterClass<a name="line.87"></a>
+<span class="sourceLineNo">088</span>  public static void tearDownAfterClass() 
throws IOException {<a name="line.88"></a>
+<span class="sourceLineNo">089</span>    UTIL.cleanupTestDir();<a 
name="line.89"></a>
+<span class="sourceLineNo">090</span>  }<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span>  @Before<a name="line.92"></a>
+<span class="sourceLineNo">093</span>  public void setUp() throws IOException 
{<a name="line.93"></a>
+<span class="sourceLineNo">094</span>    createStoreAndExecutor();<a 
name="line.94"></a>
+<span class="sourceLineNo">095</span>  }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span>  @After<a name="line.97"></a>
+<span class="sourceLineNo">098</span>  public void tearDown() {<a 
name="line.98"></a>
+<span class="sourceLineNo">099</span>    stopStoreAndExecutor();<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 final class 
WaitingProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.102"></a>
+<span class="sourceLineNo">103</span><a name="line.103"></a>
+<span class="sourceLineNo">104</span>    @Override<a name="line.104"></a>
+<span class="sourceLineNo">105</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.105"></a>
+<span class="sourceLineNo">106</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.106"></a>
+<span class="sourceLineNo">107</span>      EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.107"></a>
+<span class="sourceLineNo">108</span>      
setState(ProcedureState.WAITING_TIMEOUT);<a name="line.108"></a>
+<span class="sourceLineNo">109</span>      setTimeout(Integer.MAX_VALUE);<a 
name="line.109"></a>
+<span class="sourceLineNo">110</span>      throw new 
ProcedureSuspendedException();<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>  public static final class 
ParentProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span>    @SuppressWarnings("unchecked")<a 
name="line.116"></a>
+<span class="sourceLineNo">117</span>    @Override<a name="line.117"></a>
+<span class="sourceLineNo">118</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.118"></a>
+<span class="sourceLineNo">119</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.119"></a>
+<span class="sourceLineNo">120</span>      return new Procedure[] { new 
NoopProcedure&lt;&gt;(), new WaitingProcedure() };<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>  public static final class 
ExchangeProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span>    @SuppressWarnings("unchecked")<a 
name="line.126"></a>
+<span class="sourceLineNo">127</span>    @Override<a name="line.127"></a>
+<span class="sourceLineNo">128</span>    protected Procedure&lt;Void&gt;[] 
execute(Void env)<a name="line.128"></a>
+<span class="sourceLineNo">129</span>        throws ProcedureYieldException, 
ProcedureSuspendedException, InterruptedException {<a name="line.129"></a>
+<span class="sourceLineNo">130</span>      if 
(EXCHANGER.exchange(Boolean.TRUE)) {<a name="line.130"></a>
+<span class="sourceLineNo">131</span>        return new Procedure[] { this 
};<a name="line.131"></a>
+<span class="sourceLineNo">132</span>      } else {<a name="line.132"></a>
+<span class="sourceLineNo">133</span>        return null;<a 
name="line.133"></a>
+<span class="sourceLineNo">134</span>      }<a name="line.134"></a>
+<span class="sourceLineNo">135</span>    }<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>  public static final class 
NoopNoAckProcedure extends NoopProcedure&lt;Void&gt; {<a name="line.138"></a>
+<span class="sourceLineNo">139</span><a name="line.139"></a>
+<span class="sourceLineNo">140</span>    @Override<a name="line.140"></a>
+<span class="sourceLineNo">141</span>    protected boolean 
shouldWaitClientAck(Void env) {<a name="line.141"></a>
+<span class="sourceLineNo">142</span>      return false;<a name="line.142"></a>
+<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
+<span class="sourceLineNo">144</span>  }<a name="line.144"></a>
+<span class="sourceLineNo">145</span><a name="line.145"></a>
+<span class="sourceLineNo">146</span>  @Test<a name="line.146"></a>
+<span class="sourceLineNo">147</span>  public void testProcedureStuck() throws 
IOException, InterruptedException {<a name="line.147"></a>
+<span class="sourceLineNo">148</span>    EXEC.submitProcedure(new 
ParentProcedure());<a name="line.148"></a>
+<span class="sourceLineNo">149</span>    EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.149"></a>
+<span class="sourceLineNo">150</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.getActiveExecutorCount() == 0);<a name="line.150"></a>
+<span class="sourceLineNo">151</span>    // The above operations are used to 
make sure that we have persist the states of the two<a name="line.151"></a>
+<span class="sourceLineNo">152</span>    // procedures.<a name="line.152"></a>
+<span class="sourceLineNo">153</span>    long procId = 
EXEC.submitProcedure(new ExchangeProcedure());<a name="line.153"></a>
+<span class="sourceLineNo">154</span>    assertEquals(1, 
STORE.getActiveLogs().size());<a name="line.154"></a>
+<span class="sourceLineNo">155</span>    for (int i = 0; i &lt; WAL_COUNT - 1; 
i++) {<a name="line.155"></a>
+<span class="sourceLineNo">156</span>      
assertTrue(STORE.rollWriterForTesting());<a name="line.156"></a>
+<span class="sourceLineNo">157</span>      // The WaitinProcedure never gets 
updated so we can not delete the oldest wal file, so the<a name="line.157"></a>
+<span class="sourceLineNo">158</span>      // number of wal files will 
increase<a name="line.158"></a>
+<span class="sourceLineNo">159</span>      assertEquals(2 + i, 
STORE.getActiveLogs().size());<a name="line.159"></a>
+<span class="sourceLineNo">160</span>      EXCHANGER.exchange(Boolean.TRUE);<a 
name="line.160"></a>
+<span class="sourceLineNo">161</span>      Thread.sleep(1000);<a 
name="line.161"></a>
+<span class="sourceLineNo">162</span>    }<a name="line.162"></a>
+<span class="sourceLineNo">163</span>    STORE.rollWriterForTesting();<a 
name="line.163"></a>
+<span class="sourceLineNo">164</span>    // Finish the ExchangeProcedure<a 
name="line.164"></a>
+<span class="sourceLineNo">165</span>    EXCHANGER.exchange(Boolean.FALSE);<a 
name="line.165"></a>
+<span class="sourceLineNo">166</span>    // Make sure that we can delete 
several wal files because we force update the state of<a name="line.166"></a>
+<span class="sourceLineNo">167</span>    // WaitingProcedure. Notice that the 
last closed wal files can not be deleted, as when rolling<a name="line.167"></a>
+<span class="sourceLineNo">168</span>    // the newest wal file does not have 
anything in it, and in the closed file we still have the<a name="line.168"></a>
+<span class="sourceLineNo">169</span>    // state for the ExchangeProcedure so 
it can not be deleted<a name="line.169"></a>
+<span class="sourceLineNo">170</span>    UTIL.waitFor(10000, () -&gt; 
STORE.getActiveLogs().size() &lt;= 2);<a name="line.170"></a>
+<span class="sourceLineNo">171</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(procId));<a name="line.171"></a>
+<span class="sourceLineNo">172</span>    // Make sure that after the force 
update we could still load the procedures<a name="line.172"></a>
+<span class="sourceLineNo">173</span>    stopStoreAndExecutor();<a 
name="line.173"></a>
+<span class="sourceLineNo">174</span>    createStoreAndExecutor();<a 
name="line.174"></a>
+<span class="sourceLineNo">175</span>    Map&lt;Class&lt;?&gt;, 
Procedure&lt;Void&gt;&gt; procMap = new HashMap&lt;&gt;();<a 
name="line.175"></a>
+<span class="sourceLineNo">176</span>    
EXEC.getActiveProceduresNoCopy().forEach(p -&gt; procMap.put(p.getClass(), 
p));<a name="line.176"></a>
+<span class="sourceLineNo">177</span>    assertEquals(3, procMap.size());<a 
name="line.177"></a>
+<span class="sourceLineNo">178</span>    ParentProcedure parentProc = 
(ParentProcedure) procMap.get(ParentProcedure.class);<a name="line.178"></a>
+<span class="sourceLineNo">179</span>    assertEquals(ProcedureState.WAITING, 
parentProc.getState());<a name="line.179"></a>
+<span class="sourceLineNo">180</span>    WaitingProcedure waitingProc = 
(WaitingProcedure) procMap.get(WaitingProcedure.class);<a name="line.180"></a>
+<span class="sourceLineNo">181</span>    
assertEquals(ProcedureState.WAITING_TIMEOUT, waitingProc.getState());<a 
name="line.181"></a>
+<span class="sourceLineNo">182</span>    NoopProcedure&lt;Void&gt; noopProc = 
(NoopProcedure&lt;Void&gt;) procMap.get(NoopProcedure.class);<a 
name="line.182"></a>
+<span class="sourceLineNo">183</span>    assertEquals(ProcedureState.SUCCESS, 
noopProc.getState());<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 testCompletedProcedure() 
throws InterruptedException, IOException {<a name="line.187"></a>
+<span class="sourceLineNo">188</span>    long procId = 
EXEC.submitProcedure(new ExchangeProcedure());<a name="line.188"></a>
+<span class="sourceLineNo">189</span>    EXCHANGER.exchange(Boolean.FALSE);<a 
name="line.189"></a>
+<span class="sourceLineNo">190</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(procId));<a name="line.190"></a>
+<span class="sourceLineNo">191</span>    for (int i = 0; i &lt; WAL_COUNT - 1; 
i++) {<a name="line.191"></a>
+<span class="sourceLineNo">192</span>      
assertTrue(STORE.rollWriterForTesting());<a name="line.192"></a>
+<span class="sourceLineNo">193</span>      // The exchange procedure is 
completed but still not deleted yet so we can not delete the<a 
name="line.193"></a>
+<span class="sourceLineNo">194</span>      // oldest wal file<a 
name="line.194"></a>
+<span class="sourceLineNo">195</span>      long pid = EXEC.submitProcedure(new 
NoopNoAckProcedure());<a name="line.195"></a>
+<span class="sourceLineNo">196</span>      assertEquals(2 + i, 
STORE.getActiveLogs().size());<a name="line.196"></a>
+<span class="sourceLineNo">197</span>      UTIL.waitFor(10000, () -&gt; 
EXEC.isFinished(pid));<a name="line.197"></a>
+<span class="sourceLineNo">198</span>    }<a name="line.198"></a>
+<span class="sourceLineNo">199</span>    // Only the exchange procedure can 
not be deleted<a name="line.199"></a>
+<span class="sourceLineNo">200</span>    UTIL.waitFor(10000, () -&gt; 
EXEC.getCompletedSize() == 1);<a name="line.200"></a>
+<span class="sourceLineNo">201</span>    STORE.rollWriterForTesting();<a 
name="line.201"></a>
+<span class="sourceLineNo">202</span>    UTIL.waitFor(10000, () -&gt; 
STORE.getActiveLogs().size() &lt;= 1);<a name="line.202"></a>
+<span class="sourceLineNo">203</span>  }<a name="line.203"></a>
+<span class="sourceLineNo">204</span>}<a name="line.204"></a>
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+</pre>
+</div>
+</body>
+</html>

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