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From "Yiqun Lin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12919) RBF: Support erasure coding methods in RouterRpcServer
Date Fri, 12 Jan 2018 08:55:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16323719#comment-16323719

Yiqun Lin commented on HDFS-12919:

Overall looks good. Two minor comments related to method {{TestRouterRpc#getFileDFSClient}}.

* Would you use LOG instance to print track info as well?
* The parameter passed in {{getFileDFSClient}} seems not correct.
    assertTrue(verifyFileExists(routerFS, filePath3));
+    DFSClient file3Protocol = getFileDFSClient(filePath1);
I think here should be filePath3, the same problem to filePath2.
After this, It would be better to let  [~eddyxu] have a look. He will be more familiar than
me with HDFS EC.

> 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
>            Priority: Critical
>              Labels: RBF
>         Attachments: HDFS-12919.000.patch, HDFS-12919.001.patch, HDFS-12919.002.patch,
HDFS-12919.003.patch, HDFS-12919.004.patch, HDFS-12919.005.patch, HDFS-12919.006.patch, HDFS-12919.007.patch,
HDFS-12919.008.patch, HDFS-12919.009.patch, HDFS-12919.010.patch, HDFS-12919.011.patch, HDFS-12919.012.patch,
HDFS-12919.013.patch, HDFS-12919.013.patch, HDFS-12919.014.patch, HDFS-12919.015.patch, HDFS-12919.016.patch,
HDFS-12919.017.patch, HDFS-12919.018.patch, HDFS-12919.019.patch, HDFS-12919.020.patch, HDFS-12919.021.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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