[jira] [Assigned] (HDFS-7284) Add more debug info to BlockInfoUnderConstruction#setGenerationStampAndVerifyReplicas

["Wei-Chiu Chuang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-7284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wei-Chiu Chuang reassigned HDFS-7284:
-------------------------------------

    Assignee: Wei-Chiu Chuang

> Add more debug info to BlockInfoUnderConstruction#setGenerationStampAndVerifyReplicas
> -------------------------------------------------------------------------------------
>
>                 Key: HDFS-7284
>                 URL: https://issues.apache.org/jira/browse/HDFS-7284
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 2.5.1
>            Reporter: Hu Liu,
>            Assignee: Wei-Chiu Chuang
>
> When I was looking at some replica loss issue, I got the following info from log
> {code}
> 2014-10-13 01:54:53,104 INFO BlockStateChange: BLOCK* Removing stale replica from location x.x.x.x
> {code}
> I could just know that a replica is removed, but I don't know which block and its timestamp. I need to know the id and timestamp of the block from the log file.
> So it's better to add more info including block id and timestamp to the code snippet
> {code}
>     for (ReplicaUnderConstruction r : replicas) {
>       if (genStamp != r.getGenerationStamp()) {
>         r.getExpectedLocation().removeBlock(this);
>         NameNode.blockStateChangeLog.info("BLOCK* Removing stale replica "
>             + "from location: " + r.getExpectedLocation());
>       }
>     }
> {code}



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