Anyone experiencing 100% CPU consumption in Netty NIO transports?

[Ernesto A.]

> Thanks Ernesto,
> Im not in a position to upgrade the jdk - and it will be a long while before
> 1.6u16 is out - 14 is only just out the door.

Yes I know about about jdk u16 not being ready yet, I recommended
upgrading to the latest, in this case 14, as it is recommended to
always run the latest. But this is not your case.

> There are some workarounds mentioned on the first post of this thread...is
> it possible for me to pickup a patch and test it?

First you need to find out the exact problem you are having before
doing any patching, it could be the described bug, but it could also
be something else. And if you cannot upgrade the jdk, can you patch
it?

>
> Regards
> Neil.
>
> On Fri, Aug 7, 2009 at 3:54 PM, Ernesto A. (via Nabble) <
> ml-user+243346-445243325 at n2.nabble.com<ml-user%2B243346-445243325 at n2.nabble.com>
>> wrote:
>
>> Hi again,
>>
>> a bit more of info, I see you are running jdk 1.6_u12, even though not
>> exactly the same, check this link
>> http://issues.apache.org/jira/browse/DIRMINA-678 for a similar issue
>> on mina, they mention that a fix for the bug mentioned on that post
>> would be out for update 16 of jdk 6, so I think you should try and
>> update to the last jdk version too.
>>
>> best regards, ernesto.
>>
>> On Fri, Aug 7, 2009 at 8:56 AM, neilson9<[hidden email]<http://n2.nabble.com/user/SendEmail.jtp?type=node&node=3404822&i=0>>
>> wrote:
>> >
>> > Hi Trustin,
>> > Im not 100% - but since porting onto OpenSolaris we are getting a CPU
>> spin
>> > and the only thing we can pin it on is the NIO bug - we dont see it on
>> > Linux, OSX or windows platforms.
>> >
>> > We run an agent process and ensure its not doing any work and after a
>> minute
>> > or so it starts to spin up on the CPU.
>> >
>> > Do you have any suggestions we could try?
>> >
>> > platform: OpenSolaris/Sunos, Java1.6_u12, Netty 3.1.0 (nightly build -
>> just
>> > before GA)
>> >
>> > Regards Neil.
>> > Dump
>> > "New I/O server boss #2 (channelId: 22142166, /0.0.0.0:12004)" - Thread
>> t at 48
>> >   java.lang.Thread.State: RUNNABLE
>> >        at sun.nio.ch.DevPollArrayWrapper.poll0(Native Method)
>> >        at
>> sun.nio.ch.DevPollArrayWrapper.poll(DevPollArrayWrapper.java:164)
>> >        at
>> sun.nio.ch.DevPollSelectorImpl.doSelect(DevPollSelectorImpl.java:68)
>> >        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
>> >        - locked sun.nio.ch.Util$1 at 174b8f3
>> >        - locked java.util.Collections$UnmodifiableSet at 2861e0
>> >        - locked sun.nio.ch.DevPollSelectorImpl at 403e75
>> >        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
>> >        at
>> sun.nio.ch.ServerSocketAdaptor.accept(ServerSocketAdaptor.java:105)
>> >        - locked java.lang.Object at 1c49654
>> >        at
>> >
>> org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink$Boss.run(NioServerSocketPipelineSink.java:216)
>>
>> >        at
>> >
>> org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:110)
>>
>> >        at
>> >
>> org.jboss.netty.util.internal.IoWorkerRunnable.run(IoWorkerRunnable.java:53)
>>
>> >        at
>> >
>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>>
>> >        at
>> >
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>>
>> >        at java.lang.Thread.run(Thread.java:619)
>> >
>> >   Locked ownable synchronizers:
>> >        - locked
>> java.util.concurrent.locks.ReentrantLock$NonfairSync at 16990c9
>> >
>> >
>> > --
>> > View this message in context:
>> http://n2.nabble.com/Anyone-experiencing-100--CPU-consumption-in-Netty-NIO-transports--tp3140291p3404186.html
>> > Sent from the Netty User Group mailing list archive at Nabble.com.
>> > _______________________________________________
>> > netty-users mailing list
>> > [hidden email]<http://n2.nabble.com/user/SendEmail.jtp?type=node&node=3404822&i=1>
>> > https://lists.jboss.org/mailman/listinfo/netty-users
>> >
>>
>> _______________________________________________
>> netty-users mailing list
>> [hidden email]<http://n2.nabble.com/user/SendEmail.jtp?type=node&node=3404822&i=2>
>> https://lists.jboss.org/mailman/listinfo/netty-users
>>
>>
>> ------------------------------
>>  View message @
>> http://n2.nabble.com/Anyone-experiencing-100--CPU-consumption-in-Netty-NIO-transports--tp3140291p3404822.html
>> To unsubscribe from Re: Anyone experiencing 100% CPU consumption in Netty
>> NIO transports?, click here< (link removed) =>.
>>
>>
>>
>
> --
> View this message in context: http://n2.nabble.com/Anyone-experiencing-100--CPU-consumption-in-Netty-NIO-transports--tp3140291p3404887.html
> Sent from the Netty User Group mailing list archive at Nabble.com.
> _______________________________________________
> netty-users mailing list
> netty-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/netty-users
>