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POJava is using 100% of CPU using sockets
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  1. POJava is using 100% of CPU using sockets
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    copied!<p>I have a Java application running on a tomcat that is in a Linux machine. This application works like a socket server, where about 15 devices are connected. Its seems like when a device sends a big message the cpu grows up until 100% usage. Te problem is that if I undeploy the application, java is still having 99% of the CPU. The application has two parts:</p> <p>Socket server:</p> <pre><code> public void iniciarSocket() { Runnable serverTask = new Runnable() { @Override public void run() { try { serverSocket = new ServerSocket(PORT); System.out.println("Waiting a connection"); while (true) { Socket socket = null; try { socket = serverSocket.accept(); System.out.println("Client connected"); } catch (Exception e) { System.out.println("Error: " + e.getMessage()); } new SocketThread(socket).start(); } } catch (Exception e) { System.out.println("Error: " + e.getMessage()); } } }; Thread serverThread = new Thread(serverTask); serverThread.start(); } </code></pre> <p>Each socket thread, which connect with each device:</p> <pre><code> public void run() { try { //Output channel DataOutputStream salida; salida = new DataOutputStream(socket.getOutputStream()); System.out.println("Client connected.... "); byte[] buff = new byte[1024]; int bytesLeidos = 0; socket.setSoTimeout(300000); System.out.println("Timeout: " + socket.getSoTimeout()); while((bytesLeidos = socket.getInputStream().read(buff, 0, buff.length)) &gt; -1) { System.out.println("Bytes leidos: " + bytesLeidos); if ((bytesLeidos == 70) &amp;&amp; (Protocolo.isStatusMessage(buff))) { Protocolo.decode(buff, salida); } else { int offset = 0; while (offset &lt; bytesLeidos) { while ((offset + 70 &lt;= bytesLeidos) &amp;&amp;(!Protocolo.isStatusMessageWithOffset(buff, offset))) { offset++; } if ((offset + 70 &lt;= bytesLeidos) &amp;&amp;(Protocolo.isStatusMessageWithOffset(buff, offset))) { Protocolo.decodeWithOffset(buff, offset, salida); offset += 70; } } } } } catch (Exception e) { System.out.println(); } finally { System.out.println("Communication ended"); try { socket.close(); } catch (Exception e) { System.out.println("Socket not closed"); } } } </code></pre> <p>I don't understand what is happening and I'm traying a lot of things but I can't to solve the problem.</p>
 

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