Victor Xu created HBASE-9645:
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Summary: Regionserver halt because of HLog's "Logic Error Snapshot
seq id from earlier flush still present!"
Key: HBASE-9645
URL: https://issues.apache.org/jira/browse/HBASE-9645
Project: HBase
Issue Type: Bug
Components: regionserver, wal
Affects Versions: 0.94.10
Environment: Linux 2.6.32-el5.x86_64
Reporter: Victor Xu
Priority: Critical
I upgrade my hbase cluster to 0.94.10 three weeks ago, and this case happened
several days after that. I change the bug's priority to 'Critical' because
every time it happens, a regionserver halt down. All of them have the same log:
ERROR org.apache.hadoop.hbase.regionserver.wal.HLog: Logic Error Snapshot seq
id from earlier flush still present! for region
c0d88db4ce3606842fbec9d34c38f707 overwritten oldseq=80114270537with new
seq=80115066829
I check the code finding that it locates at HLog.startCacheFlush method. The
'lastSeqWritten' has been locked. Maybe something wrong happened outside the
HLog that change it by mistake.
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