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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1858) Master can't split logs created by THBase
Date Sat, 26 Sep 2009 20:26:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759945#action_12759945
] 

stack commented on HBASE-1858:
------------------------------

Backporting Jon's fixes to TestTHLogRecover in trunk where he updates to new API seems to
make it pass the test.  I'm running all tests now.

> Master can't split logs created by THBase
> -----------------------------------------
>
>                 Key: HBASE-1858
>                 URL: https://issues.apache.org/jira/browse/HBASE-1858
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.20.0
>            Reporter: Clint Morgan
>            Assignee: Clint Morgan
>             Fix For: 0.20.1, 0.21.0
>
>         Attachments: 1858-v2.patch, 1858.patch
>
>
> When master tries to split logs created by THbase, it fails because it tries to read
in the wrong key type. (THBase subclasses HLogKey to add fields to the key).
> 2009-09-16 09:03:01,943 WARN org.apache.hadoop.hbase.regionserver.HLog:
> Exception processing
> hdfs://domU-12-31-39-07-CC-A2.compute-1.internal:9000/hbase/.logs/domU-12-31-39-07-CC-A2.compute-1.internal,60020,1253103101743/hlog.dat.1253103102168
> -- continuing. Possible DATA LOSS!
> java.io.IOException: wrong key class:
> org.apache.hadoop.hbase.regionserver.HLogKey is not class
> org.apache.hadoop.hbase.regionserver.transactional.THLogKey
>        at
> org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1824)
>        at
> org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1876)
>        at org.apache.hadoop.hbase.regionserver.HLog.splitLog(HLog.java:880)
>        at org.apache.hadoop.hbase.regionserver.HLog.splitLog(HLog.java:802)
>        at
> org.apache.hadoop.hbase.master.ProcessServerShutdown.process(ProcessServerShutdown.java:274)
>        at
> org.apache.hadoop.hbase.master.HMaster.processToDoQueue(HMaster.java:492)
>        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:426)

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