[HBASE-9278] Reading Pre-namespace meta table edits kills the reader

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.95.2
• Fix Version/s: 0.98.0, 0.96.0
• Component/s: migration, wal
• Hadoop Flags: Reviewed
• Assignee: Himanshu Vashishtha
• Reporter: Himanshu Vashishtha
• Created: 20/Aug/13 22:37
• Updated: 20/Nov/15 11:54
• Resolved: 28/Aug/13 21:48

Description

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.

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

Issue Links

• is related to: HBASE-8348 Polish the migration to 0.96