What version of Mina are you using? We added code to mitigate this specific exemption a while back.
Do you know how much cpu Java was consuming at that point in time? On Fri, Nov 30, 2018 at 8:24 AM Krishan Babbar <[email protected]> wrote: > Thanks Stefan, > > It would be great if you could answers other questions too. > -What do you think, why application stops receiving packets from devices? > Is it only due to exception "Too many open files" or it can be due to any > other reasons as well? Please guide. > -Is my MINA configuration fine shown in below Java code? Please suggest if > I need to fine tune it more. > > Thanks & Regards, > Krishan Babbar > > > > ============================================================================================================================ > Disclaimer: This message and the information contained herein is > proprietary and confidential and subject to the Tech Mahindra policy > statement, you may review the policy at > http://www.techmahindra.com/Disclaimer.html externally > http://tim.techmahindra.com/tim/disclaimer.html internally within > TechMahindra. > > =========================================================================================================================== > > -----Original Message----- > From: Stefan Magnus Landrø <[email protected]> > Sent: Friday, November 30, 2018 5:59 PM > To: [email protected] > Cc: Atul Kandhari <[email protected]> > Subject: Re: Getting "Too many open files" warnings11 > > > https://unix.stackexchange.com/questions/108603/do-changes-in-etc-security-limits-conf-require-a-reboot > > > Sendt fra min iPhone > > > 30. nov. 2018 kl. 11:17 skrev Krishan Babbar <[email protected] > >: > > > > Dear All, > > > > I am working on an IoT project. I have created a Java application using > MINA library. All the devices are connecting to this Java application using > TCP protocol. I am getting around 3000 packets per hour from about 50 > devices as of now and it will increase soon. > > > > I am facing one issue on production environment. After running say 1-2 > days, my application stops receiving packets from all the devices but > application process keep running. To make it working again, I need to > restart my Java application. I noticed following warnings in logs. > > Warnings > > [NioSocketAcceptor-3] WARN org.apache.mina.util.DefaultExceptionMonitor > 30/11/2018 05:25:40 - Unexpected exception. > > java.io.IOException: Too many open files > > at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) > > at sun.nio.ch > .ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422) > > at sun.nio.ch > .ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250) > > at > org.apache.mina.transport.socket.nio.NioSocketAcceptor.accept(NioSocketAcceptor.java:194) > > at > org.apache.mina.transport.socket.nio.NioSocketAcceptor.accept(NioSocketAcceptor.java:51) > > at > org.apache.mina.core.polling.AbstractPollingIoAcceptor$Acceptor.processHandles(AbstractPollingIoAcceptor.java:544) > > at > org.apache.mina.core.polling.AbstractPollingIoAcceptor$Acceptor.run(AbstractPollingIoAcceptor.java:484) > > at > org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64) > > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) > > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > > at java.lang.Thread.run(Thread.java:745) > > > > Due to above warnings in logs, yesterday, after doing some Google, I > changed file limits in "/etc/security/limits.conf" file to 100000 as shown > below, but I did not restart my Java application. > > * hard nofile 100000 > > * soft nofile 100000 > > > > Today. I got the same warnings again and I was not getting any packet > from any of the devices. So I restarted my Java application and devices > started sending packets again. > > Now, my questions are > > > > - After application stopped receiving packets, I restarted my > Java application today. Will it consider new file limits i.e. 100000 and > not give Exceptions again? Or do I need to reboot machine as well? > > > > - What do you think, why application stops receiving packets > from devices? Is it only due to exception "Too many open files" or it can > be due to any other reasons as well? Please guide. > > > > - Is my MINA configuration fine shown in below Java code? > Please suggest if I need to fine tune it more. > > > > > > Below is given our code for MINA configuration. > > import java.io.IOException; > > import java.net.InetSocketAddress; > > import org.apache.log4j.Logger; > > import org.apache.mina.core.service.AbstractIoAcceptor; > > import org.apache.mina.core.session.IdleStatus; > > import org.apache.mina.filter.logging.LoggingFilter; > > import org.apache.mina.transport.socket.nio.NioDatagramAcceptor; > > > > import com.techm.tnt.protocol.gateway.util.ServerConfigLoader; > > > > /** > > * The abstract class for tcp/ip and udp listeners. > > */ > > public abstract class AbstractListener { > > > > /** The logger instance.*/ > > private static Logger LOGGER = > > Logger.getLogger(AbstractListener.class); > > > > /** The buffer size constant. */ > > protected static final int BUFFER_SIZE = 2048; > > > > /** > > * The method to initialize udp and tcp/ip listeners. > > * > > * @param portKey > > * the port of the udp or tcp/ip listener. > > * @throws IOException > > * the io exception to be thrown in case of > error. > > */ > > public void init(String portKey) throws IOException { > > LOGGER.info("Entering init()"); > > AbstractIoAcceptor acceptor = > initInternal(); > > acceptor.setHandler(new RequestHandler()); > > > acceptor.getFilterChain().addLast("logger", new LoggingFilter()); > > > acceptor.getSessionConfig().setReadBufferSize(BUFFER_SIZE); > > > acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 10); > > if (acceptor instanceof > NioDatagramAcceptor) { > > ((NioDatagramAcceptor) > acceptor).getSessionConfig().setReuseAddress(true); > > } > > acceptor.bind(new > InetSocketAddress(Integer.parseInt(ServerConfigLoader.getInstance().getProperty(portKey)))); > > LOGGER.info("Exiting init()"); > > } > > > > /** > > * The abstract method to be over ridden by appropriate > listener (udp / > > * tcp/ip) for invoking appropriate listener. > > * > > * @return the appropriate (udp/ tcp/ip) io acceptor. > > */ > > public abstract AbstractIoAcceptor initInternal(); } > > > > Appreciate all tour help. > > > > Thanks & Regards, > > Krishan Babbar > > > > > > > > ====================================================================== > > ====================================================== > > Disclaimer: This message and the information contained herein is > proprietary and confidential and subject to the Tech Mahindra policy > statement, you may review the policy at > http://www.techmahindra.com/Disclaimer.html externally > http://tim.techmahindra.com/tim/disclaimer.html internally within > TechMahindra. > > ====================================================================== > > ===================================================== > > > > ====================================================================== > > ====================================================== > > > > Disclaimer: This message and the information contained herein is > proprietary and confidential and subject to the Tech Mahindra policy > statement, you may review the policy at > http://www.techmahindra.com/Disclaimer.html < > http://www.techmahindra.com/Disclaimer.html> externally > http://tim.techmahindra.com/tim/disclaimer.html < > http://tim.techmahindra.com/tim/disclaimer.html> internally within > TechMahindra. > > > > ====================================================================== > > ====================================================== > -- CONFIDENTIALITY NOTICE: The contents of this email message and any attachments are intended solely for the addressee(s) and may contain confidential and/or privileged information and may be legally protected from disclosure.
