Hi All, 

Sorry for this email which will undoubtedly cause frustration. Can somebody 
please remove me from the list? The process for unsubscribing fails every time. 

Great technology by the way! 

----- Original Message ----- 
From: "Emmanuel Lecharny (JIRA)" <[email protected]> 
To: [email protected] 
Sent: Wednesday, 10 February, 2010 16:03:28 GMT +00:00 Monrovia 
Subject: [jira] Commented: (DIRMINA-762) WARN 
org.apache.mina.core.service.IoProcessor - Create a new selector. Selected is 
0, delta = 0 


[ 
https://issues.apache.org/jira/browse/DIRMINA-762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12832039#action_12832039
 ] 

Emmanuel Lecharny commented on DIRMINA-762: 
------------------------------------------- 

Having stripped down all that is irrelevant in this giant patch, I have some 
interesting parts : 
- a new atomic flag has been added (wakeupCalled), I don't remember why 
- this is used to protect the part of the code where we try to detect that the 
epoll is spinning 
- I'm wondering if we don't have a race condition here, and stay locked... 

A quick thread dump could help... 

> WARN org.apache.mina.core.service.IoProcessor - Create a new selector. 
> Selected is 0, delta = 0 
> ------------------------------------------------------------------------------------------------
>  
> 
> Key: DIRMINA-762 
> URL: https://issues.apache.org/jira/browse/DIRMINA-762 
> Project: MINA 
> Issue Type: Bug 
> Environment: Linux (2.6.26-2-amd64), java version 1.6.0_12 and also 1.6.0_18. 
> Reporter: Omry Yadan 
> Priority: Critical 
> Fix For: 2.0.0-RC2 
> 
> Attachments: BufferCodec.java, NettyTestServer.java, RateCounter.java, Screen 
> shot 2010-02-02 at 7.48.39 PM.png, Screen shot 2010-02-02 at 7.48.46 PM.png, 
> Screen shot 2010-02-02 at 7.48.59 PM.png, Screen shot 2010-02-02 at 7.49.13 
> PM.png, Screen shot 2010-02-02 at 7.49.18 PM.png, Server.java, 
> StressClient.java 
> 
> 
> Mina server gets into a bad state where it constantly prints : 
> WARN org.apache.mina.core.service.IoProcessor - Create a new selector. 
> Selected is 0, delta = 0 
> when this happens, server throughput drops significantly. 
> to reproduce run the attached server and client for a short while (30 seconds 
> on my box). 

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