Re: [jetty-users] 100% CPU utilization with Jetty 7.1.6

[Jesse McConnell <jesse.mcconnell@xxxxxxxxx>]

http://wiki.eclipse.org/Jetty/Feature/JVM_NIO_Bug

http://docs.codehaus.org/display/JETTY/JDK1.6+Problems

those are the two links we try and keep up with the issues that have
been run across

cheers,
jesse

--
jesse mcconnell
jesse.mcconnell@xxxxxxxxx



On Fri, Sep 24, 2010 at 13:47, Tony Thompson
<Tony.Thompson@xxxxxxxxxxxxxx> wrote:
> Not sure if the thread dump was able to help at all.  I did find something
> interesting.  We tried the Sun 1.7 JVM and CPU utilization went down to
> pretty much nothing running what would be a typical load on the server we
> are testing.  With Jetty 7.2 on the 1.6 JVM, CPU utilization still runs
> higher but doesn't totally kill the server.  It does run close to 100% most
> of the time with less than 50 users using the server.  Of course, the 1.7
> JVM is not helpful right now.  Is there any way to figure out what JVM bug
> we may be experiencing with Jetty 7.1.6/7.2?
>
> Tony
>
> Jan Bartel wrote:
>
> Tony,
>
> Can you post a thread dump during the 100% cpu?
>
> Also, any settings from jetty.xml that you have
> customized.
>
> thanks,
> Jan
>
> On 23/09/10 00:54, Tony Thompson wrote:
>
> I am attempting to update Jetty from 7.1.4 to 7.1.6.  I have a Linux
> server where CPU runs at 100% with 7.1.6 but works fine with 7.1.4. I am
> using openSUSE 11.2 with the Sun JVM version 1.6.0_21. It seems like the
> changes made for this bug ticket:
>
> http://jira.codehaus.org/browse/JETTY-1249
>
> may have affected some of the JVM bug workarounds. I am using Java
> VisualVM with the Sampler plugin and it is showing the
> org.eclipse.jetty.util.BlockingArrayQueue.poll() method is consuming the
> CPU. Does this seem reasonable or has another issue potentially crept in?
>
> If there is any additional I can provide, please let me know.
> Tony
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