Anyone experiencing 100% CPU consumption in Netty NIO transports?

[Ernesto A.]

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<neil at liquidlabs.co.uk> 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
>
>
> --
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