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MapReduce >> mail # user >> Re: FATAL org.apache.hadoop.mapred.JettyBugMonitor question


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麦树荣 2013-09-13, 07:56
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Harsh J 2013-09-14, 10:44
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回复: Re: FATAL org.apache.hadoop.mapred.JettyBugMonitor question
hi, thank you for your reply.

Hadoop version is hadoop-0.20.2-cdh3u4 ,
I guess the jetty version is jetty-6.1.26 ( because  I see the files "jetty-6.1.26.cloudera.1.jar", "jetty-servlet-tester-6.1.26.cloudera.1.jar","jetty-util-6.1.26.cloudera.1.jar " in $HADOOP_HOME/lib/ )

how to ship a  patched Jetty ? can you give me website ?

________________________________
麦树荣

发件人: Harsh J<mailto:[EMAIL PROTECTED]>
发送时间: 2013-09-14 18:44
收件人: <mailto:[EMAIL PROTECTED]> ; user6d6b4dda<mailto:[EMAIL PROTECTED]>
主题: Re: FATAL org.apache.hadoop.mapred.JettyBugMonitor question

What version of jetty are you using? We've not seen this lately (after
we began shipping a patched Jetty), but the check is valid and
protects your MR jobs from getting into a hung or slow state.

On Fri, Sep 13, 2013 at 1:26 PM, 麦树荣 <[EMAIL PROTECTED]> wrote:
> No one gives me help ?
>
> ________________________________
> 麦树荣
>
> From: 麦树荣
> Date: 2013-09-09 10:39
> To: [EMAIL PROTECTED]
> Subject: FATAL org.apache.hadoop.mapred.JettyBugMonitor question
> hi,
>
> Recently,I  encounter “FATAL org.apache.hadoop.mapred.JettyBugMonitor
> ,tasktracker shut down”problem in some hadoop computers. The log information
> is as follows:
> 2013-09-02 19:33:53,015 FATAL org.apache.hadoop.mapred.JettyBugMonitor:
> ************************************************************
> Jetty CPU usage: 120.6%. This is greater than the fatal threshold
> mapred.tasktracker.jetty.cpu.threshold.fatal. Aborting JVM.
>
> After google, I find the following relative information:
> The TaskTracker now has a thread which monitors for a known Jetty bug in
> which the selector thread starts spinning and map output can no longer be
> served. If the bug is detected, the TaskTracker will shut itself down. This
> feature can be disabled by setting
> mapred.tasktracker.jetty.cpu.check.enabled to false.
>
> How do you solve the problem usually ? Is there a simple method to deal with
> the problem ?
> Thanks.

--
Harsh J