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Posted to dev@hbase.apache.org by "Nick Dimiduk (JIRA)" <ji...@apache.org> on 2015/09/18 22:34:04 UTC

[jira] [Reopened] (HBASE-14230) replace reflection in FSHlog with HdfsDataOutputStream#getCurrentBlockReplication()

     [ https://issues.apache.org/jira/browse/HBASE-14230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nick Dimiduk reopened HBASE-14230:
----------------------------------

Hi folks.

Running ltt vs master in standalone mode, after a couple lines of the test getting started my RS log is flooded with

{noformat}
2015-09-18 13:18:33,719 WARN  [sync.2] wal.FSHLog: DFSOutputStream.getNumCurrentReplicas failed because of java.lang.ClassCastException, continuing...
2015-09-18 13:18:33,720 WARN  [sync.4] wal.FSHLog: DFSOutputStream.getNumCurrentReplicas failed because of java.lang.ClassCastException, continuing...
2015-09-18 13:18:33,720 WARN  [sync.4] wal.FSHLog: DFSOutputStream.getNumCurrentReplicas failed because of java.lang.ClassCastException, continuing...
2015-09-18 13:18:33,720 WARN  [sync.1] wal.FSHLog: DFSOutputStream.getNumCurrentReplicas failed because of java.lang.ClassCastException, continuing...
2015-09-18 13:18:33,720 WARN  [sync.2] wal.FSHLog: DFSOutputStream.getNumCurrentReplicas failed because of java.lang.ClassCastException, continuing...
2015-09-18 13:18:33,721 WARN  [sync.3] wal.FSHLog: DFSOutputStream.getNumCurrentReplicas failed because of java.lang.ClassCastException, continuing...
{noformat}

I killed it before my drive filled :)

This change looks suspicious. I grabbed a jstack too, if that's helpful. I'm running on hadoop 2.6.0/apache via homebrew. Mind taking a look?

> replace reflection in FSHlog with HdfsDataOutputStream#getCurrentBlockReplication()
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-14230
>                 URL: https://issues.apache.org/jira/browse/HBASE-14230
>             Project: HBase
>          Issue Type: Improvement
>          Components: wal
>            Reporter: Heng Chen
>            Assignee: Heng Chen
>            Priority: Minor
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>
>         Attachments: HBASE-14230.patch
>
>
> As comment TODO said, we use {{HdfsDataOutputStream#getCurrentBlockReplication}} and {{DFSOutputStream.getPipeLine}} to replace reflection in FSHlog



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