----- Original Message -----
> From: "Oleksiy Stashok" <oleksiy.stashok_at_oracle.com>
> To: dev_at_grizzly.java.net
> Sent: Thursday, March 6, 2014 2:35:00 AM
> Subject: Re: closed connection under high load
>
> Hi Tigran,
>
> >> Hi Tigran,
> >>
> >> looks like the connection is getting closed because of IOException or -1
> >> returned during channel.read(), which is expected.
> >> So IMO it's nothing decided by Grizzly, it's either other side or local
> >> OS closed the connection.
> > Yes, in did, the client closes the connection. But it looks like the reason
> > of it
> > that reply from server sent 15sec after request is arrived. The filter
> > itself took
> > max 800ms. Any ideas how to trace where rest of the time was spent?
> You can register ConnectionProbe for each Connection:
> / connection.getMonitoringConfig().addProbes(new
> ConnectionProbe() {
> .....
> });/
>
> and monitor different Connection events and time when it happened.
> It might be interesting to monitor onWriteEvent() and see if write delay
> occurs on Grizzly/Java or OS level. For example Grizzly reports the
> socketChannel.write(ByteBuffer) had been accepted the ByteBuffer, but
> the peer didn't get this data, which means the delay happens in OS layer.
I was logging in my code where I start to process the request and this
was with quite a delay. Unfortunately, my work load nodes are turned
off till the end of the week as we update cooling infrastructure in our
data center. But I will continue investigations next week. Is there any
best practice in which relations should be the number of selector and
worker threads?
BTW, what do you think about proposed change:
https://github.com/GrizzlyNIO/grizzly-mirror/pull/1
Tigran.
>
> Thanks.
>
> WBR,
> Alexey.
>
> >
> > Looking at the requests log I can see that request processing is not
> > equally distributed.
> > Some connections processed quite active, while others are not. Is there a
> > way how I can see
> > selector threads activity?
> >
> > Tigran.
> >
> >> Thanks.
> >>
> >> WBR,
> >> Alexey.
> >>
> >> On 26.02.14 14:06, Mkrtchyan, Tigran wrote:
> >>> Hi,
> >>>
> >>> we observe that grizzly decides to close connection under high load.
> >>> Any idea how to find the reason?
> >>>
> >>> Thanks,
> >>> Tigran.
> >>>
> >>> java.io.IOException: Connection closed
> >>> at
> >>> org.glassfish.grizzly.asyncqueue.TaskQueue.onClose(TaskQueue.java:302)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.AbstractNIOAsyncQueueWriter.onClose(AbstractNIOAsyncQueueWriter.java:591)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.transport.TCPNIOTransport.closeConnection(TCPNIOTransport.java:389)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at org.glassfish.grizzly.nio.NIOConnection$2.run(NIOConnection.java:439)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.DefaultSelectorHandler$RunnableTask.run(DefaultSelectorHandler.java:489)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.DefaultSelectorHandler.processPendingTaskQueue(DefaultSelectorHandler.java:295)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.DefaultSelectorHandler.processPendingTasks(DefaultSelectorHandler.java:286)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.DefaultSelectorHandler.preSelect(DefaultSelectorHandler.java:100)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.SelectorRunner.doSelect(SelectorRunner.java:326)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at org.glassfish.grizzly.nio.SelectorRunner.run(SelectorRunner.java:271)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at java.lang.Thread.run(Thread.java:744) [na:1.7.0_51]
> >>> Caused by: java.lang.Exception: Close stack trace
> >>> at
> >>> org.glassfish.grizzly.nio.NIOConnection.close0(NIOConnection.java:426)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.transport.TCPNIOConnection.close0(TCPNIOConnection.java:292)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.transport.TCPNIOTransport.read(TCPNIOTransport.java:648)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.transport.TCPNIOTransportFilter.handleRead(TCPNIOTransportFilter.java:75)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.filterchain.TransportFilter.handleRead(TransportFilter.java:173)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:546)
> >>> [grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>> at
> >>> org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
> >>> ~[grizzly-framework-2.3.5.jar:2.3.5]
> >>
>
>