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From Matías Rojas <ro...@nimbuzz.com>
Subject RE: NIO 100% CPU usage
Date Wed, 15 Oct 2008 17:54:46 GMT
It's 6.0.18

-----Original Message-----
From: Filip Hanik - Dev Lists [mailto:devlists@hanik.com] 
Sent: miércoles, 15 de octubre de 2008 07:25 p.m.
To: Tomcat Users List
Subject: Re: NIO 100% CPU usage

what version of tomcat are you using?

Filip

Matías Rojas wrote:
> Hi Filip,
> Thanks for your response.
> I can only reproduce it on production, where we are running a Linux 2.6
> Kernel with JDK 6 update 7. After a high load it is still running at 100%
> CPU usage (sometimes 200% or 300% taking 2 or 3 cores).
> Today I'll try to do some profiling to detect the exact cause, but the bug
I
> mentioned before sound like a possible cause to me.
> I understand that you said that the bug is not fixed in JDK 6 update 7?
> It's strange because here
> http://java.sun.com/javase/6/webnotes/ReleaseNotes.html it says that the
bug
> is fixed.
>
> Thanks,
> Matías
>
> -----Original Message-----
> From: Filip Hanik - Dev Lists [mailto:devlists@hanik.com] 
> Sent: martes, 14 de octubre de 2008 08:16 p.m.
> To: Tomcat Users List
> Subject: Re: NIO 100% CPU usage
>
> hi Matías,
>
> I have not yet found a way to reproduce it to put in a work around so 
> even though its not fixed in 1.5 and 1.6, we can make it work.
> If you want to work with me, we can make that happen, assuming you have 
> a way to reproduce this
>
> Filip
>
> Matías Rojas wrote:
>   
>> Hello,
>>
>> I'm experiencing a problem with NIO in Tomcat, maybe related to this
>>     
> issue:
>   
>>  
>>
>> Selector doesn't block on Selector.select(timeout) (lnx) 
>>
>> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6403933
>>
>>  
>>
>> I'm using JDK 6 update 7 and it seems not to be fixed, does anybody have
>>     
> the
>   
>> same problem?
>>
>> When in heavy load, CPU usage goes to 100% and the only way to go back to
>> normal is restarting Tomcat.
>>
>>  
>>
>> Thanks,
>>
>> Matías
>>
>>
>>   
>>     
>
>
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>
>   


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