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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> *<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> *<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.util;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.OutputStreamWriter;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.PrintStream;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.io.PrintWriter;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.lang.Thread.UncaughtExceptionHandler;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.lang.reflect.InvocationTargetException;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.lang.reflect.Method;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.nio.charset.StandardCharsets;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.concurrent.LinkedBlockingQueue;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.concurrent.ThreadFactory;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import java.util.concurrent.ThreadPoolExecutor;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import java.util.concurrent.TimeUnit;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.util.ReflectionUtils;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.util.StringUtils;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.slf4j.Logger;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.slf4j.LoggerFactory;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span>/**<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * Thread Utility<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> */<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>@InterfaceAudience.Private<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>public class Threads {<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> private static final Logger LOG = LoggerFactory.getLogger(Threads.class);<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> private static final AtomicInteger poolNumber = new AtomicInteger(1);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> public static final UncaughtExceptionHandler LOGGING_EXCEPTION_HANDLER =<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> new UncaughtExceptionHandler() {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> @Override<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> public void uncaughtException(Thread t, Throwable e) {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> LOG.warn("Thread:" + t + " exited with Exception:"<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> + StringUtils.stringifyException(e));<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> }<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> };<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> /**<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * Utility method that sets name, daemon status and starts passed thread.<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * @param t thread to run<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * @return Returns the passed Thread <code>t</code>.<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> */<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> public static <T extends Thread> T setDaemonThreadRunning(T t) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> return setDaemonThreadRunning(t, t.getName());<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> }<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> /**<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * Utility method that sets name, daemon status and starts passed thread.<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * @param t thread to frob<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * @param name new name<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * @return Returns the passed Thread <code>t</code>.<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> */<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> public static <T extends Thread> T setDaemonThreadRunning(T t, String name) {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> return setDaemonThreadRunning(t, name, null);<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> * Utility method that sets name, daemon status and starts passed thread.<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * @param t thread to frob<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * @param name new name<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * @param handler A handler to set on the thread. Pass null if want to use default handler.<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> * @return Returns the passed Thread <code>t</code>.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> */<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> public static <T extends Thread> T setDaemonThreadRunning(T t, String name,<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> UncaughtExceptionHandler handler) {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> t.setName(name);<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> if (handler != null) {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> t.setUncaughtExceptionHandler(handler);<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> }<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> t.setDaemon(true);<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> t.start();<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> return t;<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<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> * Shutdown passed thread using isAlive and join.<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> * @param t Thread to shutdown<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> */<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> public static void shutdown(final Thread t) {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> shutdown(t, 0);<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> /**<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * Shutdown passed thread using isAlive and join.<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> * @param joinwait Pass 0 if we're to wait forever.<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * @param t Thread to shutdown<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> */<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> public static void shutdown(final Thread t, final long joinwait) {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> if (t == null) return;<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> while (t.isAlive()) {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> try {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> t.join(joinwait);<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> } catch (InterruptedException e) {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> LOG.warn(t.getName() + "; joinwait=" + joinwait, e);<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> }<a name="line.118"></a> |
| <span class="sourceLineNo">119</span><a name="line.119"></a> |
| <span class="sourceLineNo">120</span><a name="line.120"></a> |
| <span class="sourceLineNo">121</span> /**<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> * @param t Waits on the passed thread to die dumping a threaddump every<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> * minute while its up.<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> * @throws InterruptedException<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> */<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> public static void threadDumpingIsAlive(final Thread t)<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> throws InterruptedException {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> if (t == null) {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> return;<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> }<a name="line.130"></a> |
| <span class="sourceLineNo">131</span><a name="line.131"></a> |
| <span class="sourceLineNo">132</span> while (t.isAlive()) {<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> t.join(60 * 1000);<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> if (t.isAlive()) {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> printThreadInfo(System.out,<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> "Automatic Stack Trace every 60 seconds waiting on " +<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> t.getName());<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> }<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> }<a name="line.140"></a> |
| <span class="sourceLineNo">141</span><a name="line.141"></a> |
| <span class="sourceLineNo">142</span> /**<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> * If interrupted, just prints out the interrupt on STDOUT, resets interrupt and returns<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> * @param millis How long to sleep for in milliseconds.<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> */<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> public static void sleep(long millis) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> try {<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> Thread.sleep(millis);<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> } catch (InterruptedException e) {<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> LOG.warn("sleep interrupted", e);<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> Thread.currentThread().interrupt();<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> }<a name="line.153"></a> |
| <span class="sourceLineNo">154</span><a name="line.154"></a> |
| <span class="sourceLineNo">155</span> /**<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> * Sleeps for the given amount of time even if interrupted. Preserves<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> * the interrupt status.<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> * @param msToWait the amount of time to sleep in milliseconds<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> */<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> public static void sleepWithoutInterrupt(final long msToWait) {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> long timeMillis = System.currentTimeMillis();<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> long endTime = timeMillis + msToWait;<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> boolean interrupted = false;<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> while (timeMillis < endTime) {<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> try {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> Thread.sleep(endTime - timeMillis);<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> } catch (InterruptedException ex) {<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> interrupted = true;<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> }<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> timeMillis = System.currentTimeMillis();<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> }<a name="line.171"></a> |
| <span class="sourceLineNo">172</span><a name="line.172"></a> |
| <span class="sourceLineNo">173</span> if (interrupted) {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> Thread.currentThread().interrupt();<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><a name="line.177"></a> |
| <span class="sourceLineNo">178</span> /**<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> * Create a new CachedThreadPool with a bounded number as the maximum<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> * thread size in the pool.<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> *<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> * @param maxCachedThread the maximum thread could be created in the pool<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> * @param timeout the maximum time to wait<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> * @param unit the time unit of the timeout argument<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> * @param threadFactory the factory to use when creating new threads<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> * @return threadPoolExecutor the cachedThreadPool with a bounded number<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> * as the maximum thread size in the pool.<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> */<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> public static ThreadPoolExecutor getBoundedCachedThreadPool(<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> int maxCachedThread, long timeout, TimeUnit unit,<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> ThreadFactory threadFactory) {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> ThreadPoolExecutor boundedCachedThreadPool =<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> new ThreadPoolExecutor(maxCachedThread, maxCachedThread, timeout,<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> unit, new LinkedBlockingQueue<>(), threadFactory);<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> // allow the core pool threads timeout and terminate<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> boundedCachedThreadPool.allowCoreThreadTimeOut(true);<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> return boundedCachedThreadPool;<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> }<a name="line.198"></a> |
| <span class="sourceLineNo">199</span><a name="line.199"></a> |
| <span class="sourceLineNo">200</span><a name="line.200"></a> |
| <span class="sourceLineNo">201</span> /**<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> * Returns a {@link java.util.concurrent.ThreadFactory} that names each created thread uniquely,<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> * with a common prefix.<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> * @param prefix The prefix of every created Thread's name<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> * @return a {@link java.util.concurrent.ThreadFactory} that names threads<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> */<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> public static ThreadFactory getNamedThreadFactory(final String prefix) {<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> SecurityManager s = System.getSecurityManager();<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> final ThreadGroup threadGroup = (s != null) ? s.getThreadGroup() : Thread.currentThread()<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> .getThreadGroup();<a name="line.210"></a> |
| <span class="sourceLineNo">211</span><a name="line.211"></a> |
| <span class="sourceLineNo">212</span> return new ThreadFactory() {<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> final AtomicInteger threadNumber = new AtomicInteger(1);<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> private final int poolNumber = Threads.poolNumber.getAndIncrement();<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> final ThreadGroup group = threadGroup;<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> @Override<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> public Thread newThread(Runnable r) {<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> final String name = prefix + "-pool" + poolNumber + "-t" + threadNumber.getAndIncrement();<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> return new Thread(group, r, name);<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> }<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> };<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> }<a name="line.223"></a> |
| <span class="sourceLineNo">224</span><a name="line.224"></a> |
| <span class="sourceLineNo">225</span> /**<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> * Same as {#newDaemonThreadFactory(String, UncaughtExceptionHandler)},<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> * without setting the exception handler.<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> */<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> public static ThreadFactory newDaemonThreadFactory(final String prefix) {<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> return newDaemonThreadFactory(prefix, null);<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> }<a name="line.231"></a> |
| <span class="sourceLineNo">232</span><a name="line.232"></a> |
| <span class="sourceLineNo">233</span> /**<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> * Get a named {@link ThreadFactory} that just builds daemon threads.<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> * @param prefix name prefix for all threads created from the factory<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> * @param handler unhandles exception handler to set for all threads<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> * @return a thread factory that creates named, daemon threads with<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> * the supplied exception handler and normal priority<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> */<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> public static ThreadFactory newDaemonThreadFactory(final String prefix,<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> final UncaughtExceptionHandler handler) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> final ThreadFactory namedFactory = getNamedThreadFactory(prefix);<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> return new ThreadFactory() {<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> @Override<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> public Thread newThread(Runnable r) {<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> Thread t = namedFactory.newThread(r);<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> if (handler != null) {<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> t.setUncaughtExceptionHandler(handler);<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> } else {<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> t.setUncaughtExceptionHandler(LOGGING_EXCEPTION_HANDLER);<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> }<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> if (!t.isDaemon()) {<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> t.setDaemon(true);<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> }<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> if (t.getPriority() != Thread.NORM_PRIORITY) {<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> t.setPriority(Thread.NORM_PRIORITY);<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> return t;<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> }<a name="line.259"></a> |
| <span class="sourceLineNo">260</span><a name="line.260"></a> |
| <span class="sourceLineNo">261</span> };<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> }<a name="line.262"></a> |
| <span class="sourceLineNo">263</span><a name="line.263"></a> |
| <span class="sourceLineNo">264</span> /** Sets an UncaughtExceptionHandler for the thread which logs the<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> * Exception stack if the thread dies.<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> */<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> public static void setLoggingUncaughtExceptionHandler(Thread t) {<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> t.setUncaughtExceptionHandler(LOGGING_EXCEPTION_HANDLER);<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> }<a name="line.269"></a> |
| <span class="sourceLineNo">270</span><a name="line.270"></a> |
| <span class="sourceLineNo">271</span> private static interface PrintThreadInfoHelper {<a name="line.271"></a> |
| <span class="sourceLineNo">272</span><a name="line.272"></a> |
| <span class="sourceLineNo">273</span> void printThreadInfo(PrintStream stream, String title);<a name="line.273"></a> |
| <span class="sourceLineNo">274</span><a name="line.274"></a> |
| <span class="sourceLineNo">275</span> }<a name="line.275"></a> |
| <span class="sourceLineNo">276</span><a name="line.276"></a> |
| <span class="sourceLineNo">277</span> private static class PrintThreadInfoLazyHolder {<a name="line.277"></a> |
| <span class="sourceLineNo">278</span><a name="line.278"></a> |
| <span class="sourceLineNo">279</span> public static final PrintThreadInfoHelper HELPER = initHelper();<a name="line.279"></a> |
| <span class="sourceLineNo">280</span><a name="line.280"></a> |
| <span class="sourceLineNo">281</span> private static PrintThreadInfoHelper initHelper() {<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> Method method = null;<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> try {<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> // Hadoop 2.7+ declares printThreadInfo(PrintStream, String)<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> method = ReflectionUtils.class.getMethod("printThreadInfo", PrintStream.class,<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> String.class);<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> method.setAccessible(true);<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> final Method hadoop27Method = method;<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> return new PrintThreadInfoHelper() {<a name="line.289"></a> |
| <span class="sourceLineNo">290</span><a name="line.290"></a> |
| <span class="sourceLineNo">291</span> @Override<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> public void printThreadInfo(PrintStream stream, String title) {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> try {<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> hadoop27Method.invoke(null, stream, title);<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> } catch (IllegalAccessException | IllegalArgumentException e) {<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> throw new RuntimeException(e);<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> } catch (InvocationTargetException e) {<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> throw new RuntimeException(e.getCause());<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> }<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> }<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> };<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> } catch (NoSuchMethodException e) {<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> LOG.info(<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> "Can not find hadoop 2.7+ printThreadInfo method, try hadoop hadoop 2.6 and earlier", e);<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> }<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> try {<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> // Hadoop 2.6 and earlier declares printThreadInfo(PrintWriter, String)<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> method = ReflectionUtils.class.getMethod("printThreadInfo", PrintWriter.class,<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> String.class);<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> method.setAccessible(true);<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> final Method hadoop26Method = method;<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> return new PrintThreadInfoHelper() {<a name="line.312"></a> |
| <span class="sourceLineNo">313</span><a name="line.313"></a> |
| <span class="sourceLineNo">314</span> @Override<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> public void printThreadInfo(PrintStream stream, String title) {<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> try {<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> hadoop26Method.invoke(null, new PrintWriter(<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> new OutputStreamWriter(stream, StandardCharsets.UTF_8)), title);<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> } catch (IllegalAccessException | IllegalArgumentException e) {<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> throw new RuntimeException(e);<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> } catch (InvocationTargetException e) {<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> throw new RuntimeException(e.getCause());<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> }<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> }<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> };<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> } catch (NoSuchMethodException e) {<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> LOG.warn("Cannot find printThreadInfo method. Check hadoop jars linked", e);<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> }<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> return null;<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> }<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> }<a name="line.331"></a> |
| <span class="sourceLineNo">332</span><a name="line.332"></a> |
| <span class="sourceLineNo">333</span> /**<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> * Print all of the thread's information and stack traces. Wrapper around Hadoop's method.<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> *<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> * @param stream the stream to<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> * @param title a string title for the stack trace<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> */<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> public static void printThreadInfo(PrintStream stream, String title) {<a name="line.339"></a> |
| <span class="sourceLineNo">340</span> Preconditions.checkNotNull(PrintThreadInfoLazyHolder.HELPER,<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> "Cannot find method. Check hadoop jars linked").printThreadInfo(stream, title);<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> }<a name="line.342"></a> |
| <span class="sourceLineNo">343</span>}<a name="line.343"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
