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POAn infinite loop somewhere in my code
 

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  1. POAn infinite loop somewhere in my code
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    <p>I have this Java game server that handles up to 3,000 tcp connections, each player, or each tcp connection has its own thread, each thread goes something like this:</p> <pre><code>public void run() { try { String packet = ""; char charCur[] = new char[1]; while(_in.read(charCur, 0, 1)!=-1 &amp;&amp; MainServer.isRunning) { if (charCur[0] != '\u0000' &amp;&amp; charCur[0] != '\n' &amp;&amp; charCur[0] != '\r') { packet += charCur[0]; }else if(!packet.isEmpty()) { parsePlayerPacket(packet); packet = ""; } } kickPlayer(); }catch(IOException e) { kickPlayer(); }catch(Exception e) { kickPlayer(); } finally { try{ kickPlayer(); }catch(Exception e){}; MainServer.removeIP(ip); } } </code></pre> <p>The code runs fine, and I know that each thread for each player is a bad idea, but I'll have too keep it this way for now. The server runs fine on a fast machine (6cor x2, 64bits, 24GB RAM, Windows Server 2003).</p> <p>But at some point, after about 12 hours of UpTime, the server starts to loop somewhere... I know that because the java process takes 99% of the CPU infinitely until the next reboot. And I'm having hard time to profile the application because I don't want to disturb the players. The profiler I use (visualvm) always end up chashing the server without telling me where's the problem. </p> <p>Anyways, in that piece of code above I think maybe the problem comes from this: </p> <pre><code>while(_in.read(charCur, 0, 1)!=-1) </code></pre> <p>(the <code>_in</code> is a <code>BufferedReader</code> of the client's socket).</p> <p>Is it possible that <code>_in.read()</code> can return something else infinitely that will keep my code runing and taking 99% of ressources? Is there something wrong with my code? I don't understand everything, I only wrote half of it. </p>
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    1. COAnything with that try...catch structure cannot be running fine.
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    2. COIf you ignore all of your exceptions like that, you'll never find out what's wrong. Handle the exceptions properly.
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    3. COI just wanted to be 100% sure that the kickPlayer() will be executed.
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