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https://issues.apache.org/jira/browse/MAPREDUCE-6222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ray Chiang updated MAPREDUCE-6222:
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Status: Open (was: Patch Available)
Found some log pollution due to this patch. I sent an email to mapreduce-dev,
but no replies yet.
=====
In Dispatcher#service(), I see this comment:
// TODO: support args converted from /path/:arg1/...
dest.action.invoke(controller, (Object[]) null);
Right now, I've made some changes in MAPREDUCE-6222 that seems to trigger
exceptions at this TODO. Can someone give me a clearer idea about what sort of
processing should occur at the point of this TODO?
On a related note, is there any additional/better documentation about the
various org.apache.hadoop.yarn.webapp and org.apache.hadoop.yarn.webapp.view
classes? There are a few things I'm trying to figure out and stepping through
with a debugger gets painful at times.
Any information is appreciated. Thanks.
> HistoryServer Hangs Processing Large Jobs
> -----------------------------------------
>
> Key: MAPREDUCE-6222
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6222
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Andrew Johnson
> Assignee: Ray Chiang
> Attachments: JHS New Display Top.png, JHS Original Display Top.png,
> MAPREDUCE-6222.001.patch, MAPREDUCE-6222.002.patch, MAPREDUCE-6222.003.patch,
> MAPREDUCE-6222.005.patch, head.jhist, historyserver_jstack.txt
>
>
> I'm encountering an issue with the Mapreduce HistoryServer processing the
> history files for large jobs. This has come up several times with for jobs
> with around 60000 total tasks. When the HistoryServer loads the .jhist file
> from HDFS for a job of that size (which is usually around 500 Mb), the
> HistoryServer's CPU usage spiked and the UI became unresponsive. After about
> 10 minutes I restarted the HistoryServer and it was behaving normally again.
> The cluster is running CDH 5.3 (2.5.0-cdh5.3.0). I've attached the output of
> jstack from a time this was occurring.
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