On Fri, Apr 17, 2009 at 5:02 AM, Oleksiy Stashok <Oleksiy.Stashok_at_sun.com>wrote:
> Hi John,
>
>
>> So, here is how you can run it:
>>
>> 1) unjar the attachment and build using maven.
>> 2) get the class path using maven: mvn dependency:build-classpath
>> 3) run TReceiver using that classpath:
>> java -cp <classpath from above>:target/classes proto.TReceiver
>> 4) run UDPSender (no special classpath needed)
>> java -cp target/classes proto.UDPSender
>>
>> Just tried to reproduce this during hour, no success :(
>> Can you please write more about:
>>
>> SEVERE: Selector was unexpectedly closed.
>>
>>
>> is there complete stacktrace?
>> Cause I got lots of exceptions, but this one didn't see.
>>
>
>
> Apr 16, 2009 9:29:22 PM com.sun.grizzly.Controller handleSelectException
> SEVERE: Selector was unexpectedly closed.
> java.io.IOException: File exists
> at sun.nio.ch.EPollArrayWrapper.epollCtl(Native Method)
> at
> sun.nio.ch.EPollArrayWrapper.updateRegistrations(EPollArrayWrapper.java:233)
> at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:214)
> at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
> at
> com.sun.grizzly.TCPSelectorHandler.select(TCPSelectorHandler.java:528)
> at com.sun.grizzly.Controller.doSelect(Controller.java:328)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:90)
> at java.lang.Thread.run(Thread.java:619)
>
> Thanks for looking and for asking. I had to modify Controller.java to
> print the stack trace in this log message. Until now I didn't know I was
> getting the File exists exception, just as in the bug report I quoted above.
>
> Thank you. I've fixed Controller code to show SEVERE exceptions stacktrace.
>
> WBR,
> Alexey.
>
Ok, so do you need me to file an issue report?
Thanks,
John
>
>
>
> Thanks,
> John
>
>
>> Thanks.
>>
>> WBR,
>> Alexey.
>>
>>
>>
>> Regards,
>> John
>>
>>
>>
>>> Thanks!
>>>
>>> -- Jeanfrancois
>>>
>>>
>>>> John
>>>>
>>>>
>>>> On Tue, Apr 14, 2009 at 10:14 AM, Jeanfrancois Arcand <
>>>> Jeanfrancois.Arcand_at_sun.com <mailto:Jeanfrancois.Arcand_at_sun.com>>
>>>> wrote:
>>>>
>>>> Salut,
>>>>
>>>> back online
>>>>
>>>>
>>>> John Franey wrote:
>>>>
>>>> Jeanfrancois,
>>>>
>>>> Just a couple of clarifications:
>>>>
>>>> 1) Running from the command line needs the jar files too. Sorry
>>>> I gave the impression that it was too easy. I think its easiest
>>>> to run from IDE, especially since a debugger is needed. I hope
>>>> that is ok.
>>>>
>>>>
>>>> OK I will try to reproduce the issue but I usually don't use IDE (I
>>>> use vim :-)).
>>>>
>>>>
>>>>
>>>>
>>>> 2) Also, the BReceiver won't be idle during the rest sleeps.
>>>> Sorry about that. Instead, once the exception occurs, simply
>>>> kill the UDPSender process, then you will be sure the BReceiver
>>>> is not receiving any new packets.
>>>>
>>>>
>>>> OK. BTW I've talked to the NIO/JDK lead and nothing about spinning
>>>> selector has been reported on jdk 4/5/6 so we might need to closely
>>>> look at your code.
>>>>
>>>> Thanks
>>>>
>>>> -- Jeanfrancois
>>>>
>>>>
>>>>
>>>> Regards,
>>>> John
>>>>
>>>>
>>>>
>>>> On Thu, Apr 9, 2009 at 2:31 PM, John Franey <jjfraney_at_gmail.com
>>>> <mailto:jjfraney_at_gmail.com> <mailto:jjfraney_at_gmail.com
>>>>
>>>> <mailto:jjfraney_at_gmail.com>>> wrote:
>>>>
>>>> Jeanfrancois,
>>>>
>>>> I got lucky, here is a test case. (gmail didn't let me send
>>>> it as
>>>> zip, so its a jar).
>>>>
>>>> this is a maven project, I guess you can build and run.
>>>>
>>>> There are two main classes.
>>>>
>>>> A receiver, BReceiver, and a sender, UDPSender.
>>>>
>>>> I run these from eclipse. I guess your IDE will let your run
>>>> them
>>>> easily, but I guess from the command line something easy like:
>>>> java -cp target/classes grizzlyproto/BReceiver would run.
>>>>
>>>> BReciever cycles a single udp port through many connections.
>>>> UDPSender sends datagrams to that port at high rate.
>>>>
>>>> Periodically, BReceiver pauses at a time when there should be
>>>> no cpu
>>>> charges to that process. Not sure this helps, but the
>>>> intention was
>>>> that if the process is using cpu at this time, then the
>>>> selector is
>>>> spinning.
>>>>
>>>> Within a few moment, BReceiver will get an exception (I do
>>>> not know
>>>> if the exception is related to the problem). Then you can set
>>>> breakpoint on Controller.doSelect's return from
>>>> selectorHandler.select (at line 329) to inspect value of
>>>> readyKeys. Its empty.
>>>>
>>>>
>>>> Here are my system specificaitons (from ubuntu 8.10)
>>>> Linux isidore 2.6.27-11-generic #1 SMP Thu Jan 29 19:28:32
>>>> UTC 2009
>>>> x86_64 GNU/Linux
>>>>
>>>>
>>>> I get the same behavior on both of these:
>>>>
>>>> java version "1.6.0_12"
>>>> Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
>>>> Java HotSpot(TM) 64-Bit Server VM (build 11.2-b01, mixed mode)
>>>>
>>>> and
>>>>
>>>> java version "1.6.0_03"
>>>> Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
>>>> BEA JRockit(R) (build
>>>> R27.5.0-110-94909-1.6.0_03-20080204-1558-linux-x86_64,
>>>> compiled mode)
>>>>
>>>>
>>>> Regards,
>>>> John
>>>>
>>>>
>>>>
>>>> On Thu, Apr 9, 2009 at 2:00 PM, John Franey
>>>> <jjfraney_at_gmail.com <mailto:jjfraney_at_gmail.com>
>>>> <mailto:jjfraney_at_gmail.com <mailto:jjfraney_at_gmail.com>>>
>>>> wrote:
>>>>
>>>> Thanks.
>>>>
>>>>
>>>> On Thu, Apr 9, 2009 at 1:02 PM, Jeanfrancois Arcand
>>>> <Jeanfrancois.Arcand_at_sun.com
>>>> <mailto:Jeanfrancois.Arcand_at_sun.com>
>>>> <mailto:Jeanfrancois.Arcand_at_sun.com
>>>> <mailto:Jeanfrancois.Arcand_at_sun.com>>> wrote:
>>>>
>>>> Salut,
>>>>
>>>>
>>>> John Franey wrote:
>>>>
>>>> Hi,
>>>>
>>>> I'm running stress tests on linux. At some
>>>> point, cpu
>>>> utilization goes high. I've verified using the
>>>> debugger
>>>> that Controller.doSelect gets zero keys back from
>>>> handler's select.
>>>>
>>>>
>>>> Yes this is an issue I've reported awhile ago to the
>>>> JDK
>>>> team. This sounds like bugparade 6403933
>>>>
>>>>
>>>> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6403933
>>>>
>>>> A connection is reset causes the file descriptor to be
>>>> selected with events POLLHUP and POLLERR but unless
>>>> there is
>>>> data waiting to be read then channel will not be
>>>> selected.
>>>> It's a awkward problem.
>>>>
>>>> This has been fixed in JDK 7 build 50 and will be
>>>> included
>>>> in JDK 6u16.
>>>>
>>>>
>>>> The last statement in the evaluation of this bug nails
>>>> it, and
>>>> the load pattern described in this bug matches mine:
>>>> http://bugs.sun.com/view_bug.do?bug_id=6693490
>>>>
>>>> It sounds like the same root cause?
>>>>
>>>>
>>>>
>>>> Google search led me to this page at apache mina
>>>> jira
>>>> DIRMINA-678
>>>> <
>>>> https://issues.apache.org/jira/browse/DIRMINA-678>.
>>>>
>>>> Please see especially, this comment from Emannual
>>>> Lecharmy (31/Mar/09 03:23 PM)
>>>> <
>>>> https://issues.apache.org/jira/browse/DIRMINA-678?focusedCommentId=12696711&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12696711
>>>> <
>>>> https://issues.apache.org/jira/browse/DIRMINA-678?focusedCommentId=12696711&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12696711
>>>> >
>>>> <
>>>> https://issues.apache.org/jira/browse/DIRMINA-678?focusedCommentId=12696711&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12696711
>>>> <
>>>> https://issues.apache.org/jira/browse/DIRMINA-678?focusedCommentId=12696711&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12696711
>>>> >>>.
>>>>
>>>>
>>>> So, I'm looking for this 'beautiful hack' in the
>>>> Controller source code for 1.9.11 and am not
>>>> seeing it.
>>>> I think maybe I'm blind :) or the hack is in
>>>> grizzly
>>>> 2.0? If its in 2.0, do you think I can make it
>>>> fit into
>>>> 1.9.11? Or do you advise I try my application on
>>>> 2.0 trunk?
>>>>
>>>>
>>>> I didn't put the hack there (just for Comet) as I
>>>> never saw
>>>> it on the Controller. Can you share a test case?
>>>>
>>>>
>>>> I don't have a test case and am working on one. I would
>>>> be
>>>> surprised if I can get it to happen without a lot of work.
>>>>
>>>> Is there a code sample from comet that has this hack in it
>>>> to
>>>> see if I can make the same change for my app?
>>>>
>>>> Thanks
>>>>
>>>> -- Jeanfrancois
>>>>
>>>>
>>>>
>>>> Thanks,
>>>> John
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail:
>>>> users-unsubscribe_at_grizzly.dev.java.net
>>>> <mailto:users-unsubscribe_at_grizzly.dev.java.net>
>>>> <mailto:users-unsubscribe_at_grizzly.dev.java.net
>>>> <mailto:users-unsubscribe_at_grizzly.dev.java.net>>
>>>>
>>>> For additional commands, e-mail:
>>>> users-help_at_grizzly.dev.java.net
>>>> <mailto:users-help_at_grizzly.dev.java.net>
>>>> <mailto:users-help_at_grizzly.dev.java.net
>>>> <mailto:users-help_at_grizzly.dev.java.net>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>>> <mailto:users-unsubscribe_at_grizzly.dev.java.net>
>>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>> <mailto:users-help_at_grizzly.dev.java.net>
>>>>
>>>>
>>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>
>>>
>> <proto.jar>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>
>>
>>
>
>