[jira] [Created] (HBASE-13396) Cleanup unclosed writers in later writer rolling

["Liu Shaohui (JIRA)" <ji...@apache.org>]

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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