Liu Shaohui created HBASE-13396:
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Summary: Cleanup unclosed writers in later writer rolling
Key: HBASE-13396
URL: https://issues.apache.org/jira/browse/HBASE-13396
Project: HBase
Issue Type: Bug
Reporter: Liu Shaohui
Assignee: Liu Shaohui
Priority: Minor
Currently, the default value of hbase.regionserver.logroll.errors.tolerated is
2, which means regionserver can tolerate two continuous failures of closing
writers at most. Temporary problems of network or namenode may cause those
failures. After those failures, the hdfs clients in RS may continue to renew
the lease of the hlog of the writer and the namenode will not help to recover
the lease of this hlog. So the last block of this hlog will be RBW(replica
being written) state until the regionserver is down. Blocks in this state will
block the datanode decommission and other operations in HDFS.
So I think we need a mechanism to clean up those unclosed writers afterwards. A
simple solution is to record those unclosed writers and attempt to close these
writers until success.
Discussions and suggestions are welcomed~ Thanks
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