http://git-wip-us.apache.org/repos/asf/hbase-site/blob/7ef4c5a9/devapidocs/src-html/org/apache/hadoop/hbase/ipc/SimpleRpcServer.Listener.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/ipc/SimpleRpcServer.Listener.html b/devapidocs/src-html/org/apache/hadoop/hbase/ipc/SimpleRpcServer.Listener.html index 2987e7b..7f61b54 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/ipc/SimpleRpcServer.Listener.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/ipc/SimpleRpcServer.Listener.html @@ -135,1305 +135,1251 @@ <span class="sourceLineNo">127</span> private Listener listener = null;<a name="line.127"></a> <span class="sourceLineNo">128</span> protected Responder responder = null;<a name="line.128"></a> <span class="sourceLineNo">129</span><a name="line.129"></a> -<span class="sourceLineNo">130</span> /**<a name="line.130"></a> -<span class="sourceLineNo">131</span> * Datastructure that holds all necessary to a method invocation and then afterward, carries<a name="line.131"></a> -<span class="sourceLineNo">132</span> * the result.<a name="line.132"></a> -<span class="sourceLineNo">133</span> */<a name="line.133"></a> -<span class="sourceLineNo">134</span> @InterfaceStability.Evolving<a name="line.134"></a> -<span class="sourceLineNo">135</span> public class Call extends RpcServer.Call {<a name="line.135"></a> -<span class="sourceLineNo">136</span><a name="line.136"></a> -<span class="sourceLineNo">137</span> protected Responder responder;<a name="line.137"></a> +<span class="sourceLineNo">130</span> /** Listens on the socket. Creates jobs for the handler threads*/<a name="line.130"></a> +<span class="sourceLineNo">131</span> private class Listener extends Thread {<a name="line.131"></a> +<span class="sourceLineNo">132</span><a name="line.132"></a> +<span class="sourceLineNo">133</span> private ServerSocketChannel acceptChannel = null; //the accept channel<a name="line.133"></a> +<span class="sourceLineNo">134</span> private Selector selector = null; //the selector that we use for the server<a name="line.134"></a> +<span class="sourceLineNo">135</span> private Reader[] readers = null;<a name="line.135"></a> +<span class="sourceLineNo">136</span> private int currentReader = 0;<a name="line.136"></a> +<span class="sourceLineNo">137</span> private final int readerPendingConnectionQueueLength;<a name="line.137"></a> <span class="sourceLineNo">138</span><a name="line.138"></a> -<span class="sourceLineNo">139</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="NP_NULL_ON_SOME_PATH",<a name="line.139"></a> -<span class="sourceLineNo">140</span> justification="Can't figure why this complaint is happening... see below")<a name="line.140"></a> -<span class="sourceLineNo">141</span> Call(int id, final BlockingService service, final MethodDescriptor md,<a name="line.141"></a> -<span class="sourceLineNo">142</span> RequestHeader header, Message param, CellScanner cellScanner,<a name="line.142"></a> -<span class="sourceLineNo">143</span> RpcServer.Connection connection, long size, TraceInfo tinfo,<a name="line.143"></a> -<span class="sourceLineNo">144</span> final InetAddress remoteAddress, int timeout, CallCleanup reqCleanup,<a name="line.144"></a> -<span class="sourceLineNo">145</span> Responder responder) {<a name="line.145"></a> -<span class="sourceLineNo">146</span> super(id, service, md, header, param, cellScanner, connection, size,<a name="line.146"></a> -<span class="sourceLineNo">147</span> tinfo, remoteAddress, timeout, reqCleanup);<a name="line.147"></a> -<span class="sourceLineNo">148</span> this.responder = responder;<a name="line.148"></a> -<span class="sourceLineNo">149</span> }<a name="line.149"></a> +<span class="sourceLineNo">139</span> private ExecutorService readPool;<a name="line.139"></a> +<span class="sourceLineNo">140</span><a name="line.140"></a> +<span class="sourceLineNo">141</span> public Listener(final String name) throws IOException {<a name="line.141"></a> +<span class="sourceLineNo">142</span> super(name);<a name="line.142"></a> +<span class="sourceLineNo">143</span> // The backlog of requests that we will have the serversocket carry.<a name="line.143"></a> +<span class="sourceLineNo">144</span> int backlogLength = conf.getInt("hbase.ipc.server.listen.queue.size", 128);<a name="line.144"></a> +<span class="sourceLineNo">145</span> readerPendingConnectionQueueLength =<a name="line.145"></a> +<span class="sourceLineNo">146</span> conf.getInt("hbase.ipc.server.read.connection-queue.size", 100);<a name="line.146"></a> +<span class="sourceLineNo">147</span> // Create a new server socket and set to non blocking mode<a name="line.147"></a> +<span class="sourceLineNo">148</span> acceptChannel = ServerSocketChannel.open();<a name="line.148"></a> +<span class="sourceLineNo">149</span> acceptChannel.configureBlocking(false);<a name="line.149"></a> <span class="sourceLineNo">150</span><a name="line.150"></a> -<span class="sourceLineNo">151</span> /**<a name="line.151"></a> -<span class="sourceLineNo">152</span> * Call is done. 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I suppose it<a name="line.159"></a> +<span class="sourceLineNo">160</span> // has an advantage in that it is easy to shutdown the pool.<a name="line.160"></a> +<span class="sourceLineNo">161</span> readPool = Executors.newFixedThreadPool(readThreads,<a name="line.161"></a> +<span class="sourceLineNo">162</span> new ThreadFactoryBuilder().setNameFormat(<a name="line.162"></a> +<span class="sourceLineNo">163</span> "RpcServer.reader=%d,bindAddress=" + bindAddress.getHostName() +<a name="line.163"></a> +<span class="sourceLineNo">164</span> ",port=" + port).setDaemon(true)<a name="line.164"></a> +<span class="sourceLineNo">165</span> .setUncaughtExceptionHandler(Threads.LOGGING_EXCEPTION_HANDLER).build());<a name="line.165"></a> +<span class="sourceLineNo">166</span> for (int i = 0; i < readThreads; ++i) {<a name="line.166"></a> +<span class="sourceLineNo">167</span> Reader reader = new Reader();<a name="line.167"></a> +<span class="sourceLineNo">168</span> readers[i] = reader;<a name="line.168"></a> +<span class="sourceLineNo">169</span> readPool.execute(reader);<a name="line.169"></a> +<span class="sourceLineNo">170</span> }<a name="line.170"></a> +<span class="sourceLineNo">171</span> LOG.info(getName() + ": started " + readThreads + " reader(s) listening on port=" + port);<a name="line.171"></a> +<span class="sourceLineNo">172</span><a name="line.172"></a> +<span class="sourceLineNo">173</span> // Register accepts on the server socket with the selector.<a name="line.173"></a> +<span class="sourceLineNo">174</span> acceptChannel.register(selector, SelectionKey.OP_ACCEPT);<a name="line.174"></a> +<span class="sourceLineNo">175</span> this.setName("RpcServer.listener,port=" + port);<a name="line.175"></a> +<span class="sourceLineNo">176</span> this.setDaemon(true);<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> Connection getConnection() {<a name="line.179"></a> -<span class="sourceLineNo">180</span> return (Connection) this.connection;<a name="line.180"></a> -<span class="sourceLineNo">181</span> }<a name="line.181"></a> -<span class="sourceLineNo">182</span><a name="line.182"></a> -<span class="sourceLineNo">183</span> }<a name="line.183"></a> -<span class="sourceLineNo">184</span><a name="line.184"></a> -<span class="sourceLineNo">185</span> /** Listens on the socket. 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Why not like hadoop just start up all the threads? I suppose it<a name="line.214"></a> -<span class="sourceLineNo">215</span> // has an advantage in that it is easy to shutdown the pool.<a name="line.215"></a> -<span class="sourceLineNo">216</span> readPool = Executors.newFixedThreadPool(readThreads,<a name="line.216"></a> -<span class="sourceLineNo">217</span> new ThreadFactoryBuilder().setNameFormat(<a name="line.217"></a> -<span class="sourceLineNo">218</span> "RpcServer.reader=%d,bindAddress=" + bindAddress.getHostName() +<a name="line.218"></a> -<span class="sourceLineNo">219</span> ",port=" + port).setDaemon(true)<a name="line.219"></a> -<span class="sourceLineNo">220</span> .setUncaughtExceptionHandler(Threads.LOGGING_EXCEPTION_HANDLER).build());<a name="line.220"></a> -<span class="sourceLineNo">221</span> for (int i = 0; i < readThreads; ++i) {<a name="line.221"></a> -<span class="sourceLineNo">222</span> Reader reader = new Reader();<a name="line.222"></a> -<span class="sourceLineNo">223</span> readers[i] = reader;<a name="line.223"></a> -<span class="sourceLineNo">224</span> readPool.execute(reader);<a name="line.224"></a> -<span class="sourceLineNo">225</span> }<a name="line.225"></a> -<span class="sourceLineNo">226</span> LOG.info(getName() + ": started " + readThreads + " reader(s) listening on port=" + port);<a name="line.226"></a> -<span class="sourceLineNo">227</span><a name="line.227"></a> -<span class="sourceLineNo">228</span> // Register accepts on the server socket with the selector.<a name="line.228"></a> -<span class="sourceLineNo">229</span> acceptChannel.register(selector, SelectionKey.OP_ACCEPT);<a name="line.229"></a> -<span class="sourceLineNo">230</span> this.setName("RpcServer.listener,port=" + port);<a name="line.230"></a> -<span class="sourceLineNo">231</span> this.setDaemon(true);<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><a name="line.234"></a> -<span class="sourceLineNo">235</span> private class Reader implements Runnable {<a name="line.235"></a> -<span class="sourceLineNo">236</span> final private LinkedBlockingQueue<Connection> pendingConnections;<a name="line.236"></a> -<span class="sourceLineNo">237</span> private final Selector readSelector;<a name="line.237"></a> -<span class="sourceLineNo">238</span><a name="line.238"></a> -<span class="sourceLineNo">239</span> Reader() throws IOException {<a name="line.239"></a> -<span class="sourceLineNo">240</span> this.pendingConnections = new LinkedBlockingQueue<>(readerPendingConnectionQueueLength);<a name="line.240"></a> -<span class="sourceLineNo">241</span> this.readSelector = Selector.open();<a name="line.241"></a> -<span class="sourceLineNo">242</span> }<a name="line.242"></a> -<span class="sourceLineNo">243</span><a name="line.243"></a> -<span class="sourceLineNo">244</span> @Override<a name="line.244"></a> -<span class="sourceLineNo">245</span> public void run() {<a name="line.245"></a> -<span class="sourceLineNo">246</span> try {<a name="line.246"></a> -<span class="sourceLineNo">247</span> doRunLoop();<a name="line.247"></a> -<span class="sourceLineNo">248</span> } finally {<a name="line.248"></a> -<span class="sourceLineNo">249</span> try {<a name="line.249"></a> -<span class="sourceLineNo">250</span> readSelector.close();<a name="line.250"></a> -<span class="sourceLineNo">251</span> } catch (IOException ioe) {<a name="line.251"></a> -<span class="sourceLineNo">252</span> LOG.error(getName() + ": error closing read selector in " + getName(), ioe);<a name="line.252"></a> -<span class="sourceLineNo">253</span> }<a name="line.253"></a> -<span class="sourceLineNo">254</span> }<a name="line.254"></a> -<span class="sourceLineNo">255</span> }<a name="line.255"></a> -<span class="sourceLineNo">256</span><a name="line.256"></a> -<span class="sourceLineNo">257</span> private synchronized void doRunLoop() {<a name="line.257"></a> -<span class="sourceLineNo">258</span> while (running) {<a name="line.258"></a> -<span class="sourceLineNo">259</span> try {<a name="line.259"></a> -<span class="sourceLineNo">260</span> // Consume as many connections as currently queued to avoid<a name="line.260"></a> -<span class="sourceLineNo">261</span> // unbridled acceptance of connections that starves the select<a name="line.261"></a> -<span class="sourceLineNo">262</span> int size = pendingConnections.size();<a name="line.262"></a> -<span class="sourceLineNo">263</span> for (int i=size; 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justification="selector access is not synchronized; seems fine but concerned changing " +<a name="line.304"></a> -<span class="sourceLineNo">305</span> "it will have per impact")<a name="line.305"></a> -<span class="sourceLineNo">306</span> public void run() {<a name="line.306"></a> -<span class="sourceLineNo">307</span> LOG.info(getName() + ": starting");<a name="line.307"></a> -<span class="sourceLineNo">308</span> connectionManager.startIdleScan();<a name="line.308"></a> -<span class="sourceLineNo">309</span> while (running) {<a name="line.309"></a> -<span class="sourceLineNo">310</span> SelectionKey key = null;<a name="line.310"></a> -<span class="sourceLineNo">311</span> try {<a name="line.311"></a> -<span class="sourceLineNo">312</span> selector.select(); // FindBugs IS2_INCONSISTENT_SYNC<a name="line.312"></a> -<span class="sourceLineNo">313</span> Iterator<SelectionKey> iter = selector.selectedKeys().iterator();<a name="line.313"></a> -<span class="sourceLineNo">314</span> 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name="line.337"></a> -<span class="sourceLineNo">338</span> // some thread(s) a chance to finish<a name="line.338"></a> -<span class="sourceLineNo">339</span> LOG.warn(getName() + ": OutOfMemoryError in server select", e);<a name="line.339"></a> -<span class="sourceLineNo">340</span> closeCurrentConnection(key, e);<a name="line.340"></a> -<span class="sourceLineNo">341</span> connectionManager.closeIdle(true);<a name="line.341"></a> -<span class="sourceLineNo">342</span> try {<a name="line.342"></a> -<span class="sourceLineNo">343</span> Thread.sleep(60000);<a name="line.343"></a> -<span class="sourceLineNo">344</span> } catch (InterruptedException ex) {<a name="line.344"></a> -<span class="sourceLineNo">345</span> LOG.debug("Interrupted while sleeping");<a name="line.345"></a> -<span class="sourceLineNo">346</span> }<a name="line.346"></a> -<span class="sourceLineNo">347</span> }<a name="line.347"></a> -<span class="sourceLineNo">348</span> } catch (Exception e) {<a 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Reader() throws IOException {<a name="line.184"></a> +<span class="sourceLineNo">185</span> this.pendingConnections = new LinkedBlockingQueue<>(readerPendingConnectionQueueLength);<a name="line.185"></a> +<span class="sourceLineNo">186</span> this.readSelector = Selector.open();<a name="line.186"></a> +<span class="sourceLineNo">187</span> }<a name="line.187"></a> +<span class="sourceLineNo">188</span><a name="line.188"></a> +<span class="sourceLineNo">189</span> @Override<a name="line.189"></a> +<span class="sourceLineNo">190</span> public void run() {<a name="line.190"></a> +<span class="sourceLineNo">191</span> try {<a name="line.191"></a> +<span class="sourceLineNo">192</span> doRunLoop();<a name="line.192"></a> +<span class="sourceLineNo">193</span> } finally {<a name="line.193"></a> +<span class="sourceLineNo">194</span> try {<a name="line.194"></a> +<span class="sourceLineNo">195</span> readSelector.close();<a name="line.195"></a> +<span class="sourceLineNo">196</span> } catch 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CancelledKeyException in Reader", e);<a name="line.229"></a> +<span class="sourceLineNo">230</span> } catch (IOException ex) {<a name="line.230"></a> +<span class="sourceLineNo">231</span> LOG.info(getName() + ": IOException in Reader", ex);<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> }<a name="line.234"></a> +<span class="sourceLineNo">235</span><a name="line.235"></a> +<span class="sourceLineNo">236</span> /**<a name="line.236"></a> +<span class="sourceLineNo">237</span> * Updating the readSelector while it's being used is not thread-safe,<a name="line.237"></a> +<span class="sourceLineNo">238</span> * so the connection must be queued. 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justification="selector access is not synchronized; seems fine but concerned changing " +<a name="line.249"></a> +<span class="sourceLineNo">250</span> "it will have per impact")<a name="line.250"></a> +<span class="sourceLineNo">251</span> public void run() {<a name="line.251"></a> +<span class="sourceLineNo">252</span> LOG.info(getName() + ": starting");<a name="line.252"></a> +<span class="sourceLineNo">253</span> connectionManager.startIdleScan();<a name="line.253"></a> +<span class="sourceLineNo">254</span> while (running) {<a name="line.254"></a> +<span class="sourceLineNo">255</span> SelectionKey key = null;<a name="line.255"></a> +<span class="sourceLineNo">256</span> try {<a name="line.256"></a> +<span class="sourceLineNo">257</span> selector.select(); // FindBugs IS2_INCONSISTENT_SYNC<a name="line.257"></a> +<span class="sourceLineNo">258</span> Iterator<SelectionKey> iter = selector.selectedKeys().iterator();<a name="line.258"></a> +<span class="sourceLineNo">259</span> 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name="line.293"></a> +<span class="sourceLineNo">294</span> closeCurrentConnection(key, e);<a name="line.294"></a> +<span class="sourceLineNo">295</span> }<a name="line.295"></a> +<span class="sourceLineNo">296</span> }<a name="line.296"></a> +<span class="sourceLineNo">297</span> LOG.info(getName() + ": stopping");<a name="line.297"></a> +<span class="sourceLineNo">298</span> synchronized (this) {<a name="line.298"></a> +<span class="sourceLineNo">299</span> try {<a name="line.299"></a> +<span class="sourceLineNo">300</span> acceptChannel.close();<a name="line.300"></a> +<span class="sourceLineNo">301</span> selector.close();<a name="line.301"></a> +<span class="sourceLineNo">302</span> } catch (IOException ignored) {<a name="line.302"></a> +<span class="sourceLineNo">303</span> if (LOG.isTraceEnabled()) LOG.trace("ignored", ignored);<a name="line.303"></a> +<span class="sourceLineNo">304</span> }<a name="line.304"></a> +<span class="sourceLineNo">305</span><a name="line.305"></a> 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name="line.317"></a> +<span class="sourceLineNo">318</span> if (c != null) {<a name="line.318"></a> +<span class="sourceLineNo">319</span> closeConnection(c);<a name="line.319"></a> +<span class="sourceLineNo">320</span> key.attach(null);<a name="line.320"></a> +<span class="sourceLineNo">321</span> }<a name="line.321"></a> +<span class="sourceLineNo">322</span> }<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> InetSocketAddress getAddress() {<a name="line.325"></a> +<span class="sourceLineNo">326</span> return address;<a name="line.326"></a> +<span class="sourceLineNo">327</span> }<a name="line.327"></a> +<span class="sourceLineNo">328</span><a name="line.328"></a> +<span class="sourceLineNo">329</span> void doAccept(SelectionKey key) throws InterruptedException, IOException, OutOfMemoryError {<a name="line.329"></a> +<span 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== null) {<a name="line.339"></a> +<span class="sourceLineNo">340</span> if (channel.isOpen()) {<a name="line.340"></a> +<span class="sourceLineNo">341</span> IOUtils.cleanup(null, channel);<a name="line.341"></a> +<span class="sourceLineNo">342</span> }<a name="line.342"></a> +<span class="sourceLineNo">343</span> continue;<a name="line.343"></a> +<span class="sourceLineNo">344</span> }<a name="line.344"></a> +<span class="sourceLineNo">345</span> key.attach(c); // so closeCurrentConnection can get the object<a name="line.345"></a> +<span class="sourceLineNo">346</span> reader.addConnection(c);<a name="line.346"></a> +<span class="sourceLineNo">347</span> }<a name="line.347"></a> +<span class="sourceLineNo">348</span> }<a name="line.348"></a> +<span class="sourceLineNo">349</span><a name="line.349"></a> +<span class="sourceLineNo">350</span> void doRead(SelectionKey key) throws InterruptedException {<a name="line.350"></a> +<span class="sourceLineNo">351</span> int count;<a 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connection = (Connection) key.attachment();<a name="line.533"></a> +<span class="sourceLineNo">534</span> if (connection == null) {<a name="line.534"></a> +<span class="sourceLineNo">535</span> throw new IllegalStateException("Coding error: SelectionKey key without attachment.");<a name="line.535"></a> +<span class="sourceLineNo">536</span> }<a name="line.536"></a> +<span class="sourceLineNo">537</span> SimpleServerCall call = connection.responseQueue.peekFirst();<a name="line.537"></a> +<span class="sourceLineNo">538</span> if (call != null && now > call.lastSentTime + purgeTimeout) {<a name="line.538"></a> +<span class="sourceLineNo">539</span> conWithOldCalls.add(call.getConnection());<a name="line.539"></a> +<span class="sourceLineNo">540</span> }<a name="line.540"></a> +<span class="sourceLineNo">541</span> }<a name="line.541"></a> +<span class="sourceLineNo">542</span> }<a name="line.542"></a> +<span class="sourceLineNo">543</span><a name="line.543"></a> +<span class="sourceLineNo">544</span> // Seems safer to close the connection outside of the synchronized loop...<a name="line.544"></a> +<span class="sourceLineNo">545</span> for (Connection connection : conWithOldCalls) {<a name="line.545"></a> +<span class="sourceLineNo">546</span> closeConnection(connection);<a name="line.546"></a> +<span class="sourceLineNo">547</span> }<a name="line.547"></a> +<span class="sourceLineNo">548</span><a name="line.548"></a> +<span class="sourceLineNo">549</span> return now;<a name="line.549"></a> +<span class="sourceLineNo">550</span> }<a name="line.550"></a> +<span class="sourceLineNo">551</span><a name="line.551"></a> +<span class="sourceLineNo">552</span> private void doAsyncWrite(SelectionKey key) throws IOException {<a name="line.552"></a> +<span class="sourceLineNo">553</span> Connection connection = (Connection) key.attachment();<a name="line.553"></a> +<span class="sourceLineNo">554</span> if (connection == null) {<a name="line.554"></a> +<span 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<TRUNCATED>
