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From Íñigo Goiri (JIRA) <j...@apache.org>
Subject [jira] [Commented] (HDFS-12919) RBF: support erasure coding methods in RouterRpcServer
Date Thu, 14 Dec 2017 00:53:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16290165#comment-16290165
] 

Íñigo Goiri commented on HDFS-12919:
------------------------------------

[^HDFS-12919.000.patch] might be a little heavy to review.
We can go with a simpler patch where we don't throw an exception for the {{setErasureCodingPolicy()}}
and implement the EC stuff in a different JIRA.
Is there any end-to-end test that submits MR jobs and uses a mini cluster?

> RBF: support erasure coding methods in RouterRpcServer
> ------------------------------------------------------
>
>                 Key: HDFS-12919
>                 URL: https://issues.apache.org/jira/browse/HDFS-12919
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: 3.0.0
>            Reporter: Íñigo Goiri
>            Assignee: Íñigo Goiri
>              Labels: RBF
>         Attachments: HDFS-12919.000.patch
>
>
> MAPREDUCE-6954 started to tune the erasure coding settings for staging files. However,
the {{Router}} does not support this operation and throws:
> {code}
> 17/12/12 14:36:07 INFO mapreduce.JobSubmitter: Cleaning up the staging area /tmp/hadoop-yarn/staging/hadoop/.staging/job_1513116010218_0002
> org.apache.hadoop.ipc.RemoteException(java.lang.UnsupportedOperationException): Operation
"setErasureCodingPolicy" is not supported
>         at org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.checkOperation(RouterRpcServer.java:368)
>         at org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.setErasureCodingPolicy(RouterRpcServer.java:1805)
> {code}



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