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POTomcat web application stops automatically
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  1. POTomcat web application stops automatically
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    copied!<p>I have a dedicated server running CentOS 5.9, Apache-Tomcat 5.5.36. I have written a JAVA web applications which runs every minute to collect the data from multiple sensors. I am using ScheduledExecutorService to execute the threads. (one thread for each sensor every minute and there can be more than hundred sensors) The flow of the thread is</p> <ol> <li>Collect sensor information from the database.</li> <li>Sends the command to the instrument to collect data.</li> <li>Update the database with the data values.</li> </ol> <p>There is another application that checks the database every minute and send the alerts to the users (if necessary). I have monitored the application using jvisualVM, I cant find any memory leak. for every thread. The applications work fine but after some time(24 Hour - 48 Hours) the applications stop working. I cant find out what the problem could be, is it server configuration problem, too many threads or what?</p> <p>Does anyone have any idea what might be going wrong or is there anyone who has done think kind of work? Please help, Thanks</p> <p>UPDATE : including code</p> <pre><code>public class Scheduler { private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1); public void startProcess(int start) { final Runnable uploader = new Runnable() { @SuppressWarnings("rawtypes") public void run() { //Select data from the database ArrayList dataList = getData(); for(int i=0;i&lt;dataList.size();i++) { String args = dataList.get(i).toString(); ExecutorThread comThread = new ExecutorThread(args...); comThread.start(); } } }; scheduler.scheduleAtFixedRate(uploader, 0, 60 , TimeUnit.SECONDS); } } public class ExecutorThread extends Thread { private variables... public CommunicationThread(args..) { //Initialise private variable } public void run() { //Collect data from sensor //Update Database } } </code></pre>
 

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