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From Vinod Kumar Vavilapalli <vino...@apache.org>
Subject Re: history server for 2 clusters
Date Fri, 21 Feb 2014 05:20:49 GMT
Interesting use-case and setup. We never had this use-case in mind so far - we so far assumed
a history-server per YARN cluster. You may be running into some issues where this assumption
is not valid.

Why do you need two separate YARN clusters for the same underlying data on HDFS? And if that
can't change, why can't you have two history-servers?


On Feb 20, 2014, at 6:08 PM, Anfernee Xu <anfernee.xu@gmail.com> wrote:

> Hi,
> I'm at 2.2.0 release and I have a HDFS cluster which is shared by 2 YARN(MR) cluster,
also I have a single shared history server, what I'm seeing is I can see all job summary for
all jobs from history server UI, I also can see task log for jobs running in one cluster,
but if I want to see log for jobs running in another cluster, it showed me below error
> Logs not available for attempt_1392933787561_0024_m_000000_0. Aggregation may not be
complete, Check back later or try the nodemanager at slc03jvt.mydomain.com:31303 
> Here's my configuration:
> Note: my history server is running on RM node of the MR cluster where I can see the log.
> --------mapred-site.xml
> <property>
>   <name>mapreduce.jobhistory.address</name>
>   <value>slc00dgd:10020</value>
>   <description>MapReduce JobHistory Server IPC host:port</description>
> </property>
> <property>
>   <name>mapreduce.jobhistory.webapp.address</name>
>   <value>slc00dgd:19888</value>
>   <description>MapReduce JobHistory Server Web UI host:port</description>
> </property>
> ----------yarn-site.xml
>   <property>
>      <name>yarn.log-aggregation-enable</name>
>      <value>true</value>
>    </property>
>    <property>
>      <name>yarn.nodemanager.remote-app-log-dir-suffix</name>
>      <value>dc</value>
>    </property>
> Above configuration are almost same for both clusters, the only difference is "yarn.nodemanager.remote-app-log-dir-suffix",
they have different suffix.
> -- 
> --Anfernee

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