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From "Himanshu Vashishtha (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-9278) Reading Pre-namespace meta table edits kills the reader
Date Tue, 20 Aug 2013 22:37:53 GMT
Himanshu Vashishtha created HBASE-9278:
------------------------------------------

             Summary: Reading Pre-namespace meta table edits kills the reader
                 Key: HBASE-9278
                 URL: https://issues.apache.org/jira/browse/HBASE-9278
             Project: HBase
          Issue Type: Bug
          Components: migration, wal
    Affects Versions: 0.95.2
            Reporter: Himanshu Vashishtha
            Assignee: Himanshu Vashishtha
            Priority: Critical
             Fix For: 0.95.3


In upgrading to 0.96, there might be some meta/root table edits. Currently, we are just killing
SplitLogWorker thread in case it sees any META, or ROOT waledit, which blocks log splitting/replaying
of remaining WALs.
{code}
2013-08-20 15:45:16,998 ERROR regionserver.SplitLogWorker (SplitLogWorker.java:run(210)) -
unexpected error 
java.lang.IllegalArgumentException: .META. no longer exists. The table has been renamed to
hbase:meta
        at org.apache.hadoop.hbase.TableName.valueOf(TableName.java:269)
        at org.apache.hadoop.hbase.TableName.valueOf(TableName.java:261)
        at org.apache.hadoop.hbase.regionserver.wal.HLogKey.readFields(HLogKey.java:338)
        at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1898)
        at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1938)
        at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.readNext(SequenceFileLogReader.java:215)
        at org.apache.hadoop.hbase.regionserver.wal.ReaderBase.next(ReaderBase.java:98)
        at org.apache.hadoop.hbase.regionserver.wal.ReaderBase.next(ReaderBase.java:85)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.getNextLogLine(HLogSplitter.java:582)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFile(HLogSplitter.java:292)
        at org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFile(HLogSplitter.java:209)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker$1.exec(SplitLogWorker.java:138)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.grabTask(SplitLogWorker.java:358)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.taskLoop(SplitLogWorker.java:245)
        at org.apache.hadoop.hbase.regionserver.SplitLogWorker.run(SplitLogWorker.java:205)
        at java.lang.Thread.run(Thread.java:662)
2013-08-20 15:45:16,999 INFO  regionserver.SplitLogWorker (SplitLogWorker.java:run(212)) -
SplitLogWorker localhost,60020,1377035111898 exiting
{code}


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