Salut,
John Franey wrote:
>
>
> On Mon, Apr 20, 2009 at 10:14 AM, Jeanfrancois Arcand
> <Jeanfrancois.Arcand_at_sun.com <mailto:Jeanfrancois.Arcand_at_sun.com>> wrote:
>
> Salut,
>
> John Franey wrote:
>
>
>
> On Fri, Apr 17, 2009 at 8:21 AM, Oleksiy Stashok
> <Oleksiy.Stashok_at_sun.com <mailto:Oleksiy.Stashok_at_sun.com>
> <mailto:Oleksiy.Stashok_at_sun.com
> <mailto:Oleksiy.Stashok_at_sun.com>>> wrote:
>
>
>
> 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.
>
>
> Ok, so do you need me to file an issue report?
>
> Yes, and if you have workaround - will appreciate if you can
> share it.
>
> Thanks.
>
> WBR,
> Alexey.
>
>
> Alexey,
>
> I don't have a workaround to the cpu spin on select. I'm hoping
> to find one here.
>
> From my first entry on this thread:
>
> 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>>.
>
> 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?
>
>
> Jeanfrancois said:
>
> 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 am not having success finding this hack in Comet. Any pointer?
>
>
> https://glassfish.dev.java.net/issues/show_bug.cgi?id=6940
>
> I will try to backport/port the fix to the Controller and will send
> you a patch to test.
>
>
> Thanks. I hope you and Alexey are not working against each other.
>
> Also, I saw that Alan Bateman, sun nio-dev, had submitted a fix for
> 6693490 for review and it was approved:
> http://mail.openjdk.java.net/pipermail/core-libs-dev/2009-March/001331.html.
> I don't know the sun release process or schedule; so I don't know if
> this is important.
Yes this is the official approval for the current issue.
Thanks
-- Jeanfrancois
>
>
>
> Thanks
>
> -- Jeanfrancois
>
>
>
> Thanks
>
>
>
>
> 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>
>
> <mailto:Jeanfrancois.Arcand_at_sun.com
> <mailto:Jeanfrancois.Arcand_at_sun.com>>
>
> <mailto: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,
>
> 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>>
> <mailto:jjfraney_at_gmail.com
> <mailto:jjfraney_at_gmail.com>
> <mailto:jjfraney_at_gmail.com
> <mailto:jjfraney_at_gmail.com>>>
> <mailto:jjfraney_at_gmail.com
> <mailto:jjfraney_at_gmail.com>
> <mailto:jjfraney_at_gmail.com
> <mailto:jjfraney_at_gmail.com>>
>
> <mailto: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>>
> <mailto:jjfraney_at_gmail.com
> <mailto:jjfraney_at_gmail.com>
> <mailto:jjfraney_at_gmail.com
> <mailto:jjfraney_at_gmail.com>>>
>
> <mailto:jjfraney_at_gmail.com <mailto:jjfraney_at_gmail.com>
> <mailto:jjfraney_at_gmail.com
> <mailto:jjfraney_at_gmail.com>>
> <mailto: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>>
>
> <mailto:Jeanfrancois.Arcand_at_sun.com
> <mailto:Jeanfrancois.Arcand_at_sun.com>
>
> <mailto:Jeanfrancois.Arcand_at_sun.com
> <mailto:Jeanfrancois.Arcand_at_sun.com>>>
>
> <mailto:Jeanfrancois.Arcand_at_sun.com
> <mailto:Jeanfrancois.Arcand_at_sun.com>
>
> <mailto:Jeanfrancois.Arcand_at_sun.com
> <mailto:Jeanfrancois.Arcand_at_sun.com>>
>
> <mailto: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>>
>
> <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>>>
>
>
> <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>>
>
> <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
>
>
>
>
>
>
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