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Date: Thu, 29 Aug 2013 00:39:52 +0000 (UTC)
From: "Jean-Daniel Cryans (JIRA)" <jira@apache.org>
To: dev@hbase.apache.org
Message-ID: <JIRA.12666012.1377726662725.51031.1377736792193@arcas>
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Subject: [jira] [Resolved] (HBASE-9371) Eliminate log spam when tailing
 files
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     [ https://issues.apache.org/jira/browse/HBASE-9371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jean-Daniel Cryans resolved HBASE-9371.
---------------------------------------

      Resolution: Fixed
        Assignee: Jean-Daniel Cryans
    Hadoop Flags: Reviewed

Committed to branch and trunk, thanks Stack.
                
> Eliminate log spam when tailing files
> -------------------------------------
>
>                 Key: HBASE-9371
>                 URL: https://issues.apache.org/jira/browse/HBASE-9371
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.95.2
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>            Priority: Minor
>             Fix For: 0.98.0, 0.96.0
>
>         Attachments: HBASE-9371.patch
>
>
> Tailing a file involves reopening it for each seek, so for example when running replication it looks like this every time:
> {noformat}
> 2013-08-28 21:45:00,205 DEBUG [regionserver60020-EventThread.replicationSource,1] org.apache.hadoop.hbase.fs.HFileSystem: /hbase-master/WALs/jdec2hbase0403-5,60020,1377724981186/jdec2hbase0403-5%2C60020%2C1377724981186.1377725847406 is an HLog file, so reordering blocks, last hostname will be:jdec2hbase0403-5
> 2013-08-28 21:45:00,211 DEBUG [regionserver60020-EventThread.replicationSource,1] org.apache.hadoop.hbase.regionserver.wal.ProtobufLogReader: After reading the trailer: walEditsStopOffset: 0, fileLength: 0, trailerPresent: false
> {noformat}
> The frequency makes it more relevant for TRACEing.

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