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Posted to issues@hbase.apache.org by "Jean-Daniel Cryans (JIRA)" <ji...@apache.org> on 2013/08/28 23:51:53 UTC

[jira] [Created] (HBASE-9371) Eliminate log spam when tailing files

Jean-Daniel Cryans created HBASE-9371:
-----------------------------------------

             Summary: 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
            Priority: Minor
             Fix For: 0.98.0, 0.96.0


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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