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https://issues.apache.org/jira/browse/HBASE-24984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17361322#comment-17361322
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Duo Zhang commented on HBASE-24984:
-----------------------------------

I think first we could introduce a UT to reproduce this bug, and then let's 
find a proper way to fix.

> WAL corruption due to early DBBs re-use when Durability.ASYNC_WAL is used 
> with multi operation
> ----------------------------------------------------------------------------------------------
>
>                 Key: HBASE-24984
>                 URL: https://issues.apache.org/jira/browse/HBASE-24984
>             Project: HBase
>          Issue Type: Bug
>          Components: rpc, wal
>    Affects Versions: 2.1.6
>            Reporter: Liu Junhong
>            Priority: Critical
>
> After bugfix HBASE-22539, When client use BufferedMutator or multiple 
> mutation , there will be one RpcCall and mutliple FSWALEntry .  At the time 
> RpcCall finish and one FSWALEntry call release() , the remain FSWALEntries 
> may trigger RuntimeException or segmentation fault .
> We should use RefCnt  instead of AtomicInteger for 
> org.apache.hadoop.hbase.ipc.ServerCall.reference?



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