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https://issues.apache.org/jira/browse/HBASE-2964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907052#action_12907052
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HBase Review Board commented on HBASE-2964:
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Message from: "Todd Lipcon" <t...@cloudera.com>
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Seems to make sense. Let me try it on a cluster before I +1 it
src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
<http://review.cloudera.org/r/798/#comment3823>
maybe now we can do an:
assert !this.parent.lock.writeLock().isHeldByCurrentThread() : "Unsafe to
hold write lock while performing RPCs";
- Todd
> Deadlock when RS tries to RPC to itself inside SplitTransaction
> ---------------------------------------------------------------
>
> Key: HBASE-2964
> URL: https://issues.apache.org/jira/browse/HBASE-2964
> Project: HBase
> Issue Type: Bug
> Components: ipc, regionserver
> Affects Versions: 0.90.0
> Reporter: Todd Lipcon
> Priority: Blocker
> Attachments: hbase-2964.txt
>
>
> In testing the 0.89.20100830 rc, I ran into a deadlock with the following
> situation:
> - All of the IPC Handler threads are blocked on the region lock, which is
> held by CompactSplitThread.
> - CompactSplitThread is in the process of trying to edit META to create the
> offline parent. META happens to be on the same server as is executing the
> split.
> Therefore, the CompactSplitThread is trying to connect back to itself, but
> all of the handler threads are blocked, so the IPC never happens. Thus, the
> entire RS gets deadlocked.
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