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https://issues.apache.org/jira/browse/HBASE-14802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15006203#comment-15006203
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Hudson commented on HBASE-14802:
--------------------------------
FAILURE: Integrated in HBase-Trunk_matrix #469 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/469/])
HBASE-14802 Replaying server crash recovery procedure after a failover (stack:
rev dd5f454b03b9ccd788398fa52220c7690381eb6f)
*
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ServerCrashProcedure.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestDeadServer.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/master/DeadServer.java
> Replaying server crash recovery procedure after a failover causes incorrect
> handling of deadservers
> ---------------------------------------------------------------------------------------------------
>
> Key: HBASE-14802
> URL: https://issues.apache.org/jira/browse/HBASE-14802
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 2.0.0, 1.2.0, 1.2.1
> Reporter: Ashu Pachauri
> Assignee: Ashu Pachauri
> Fix For: 2.0.0, 1.2.0, 1.3.0
>
> Attachments: 14802.addendum.branch-1.txt, HBASE-14802-1.patch,
> HBASE-14802-2.patch, HBASE-14802-3.patch, HBASE-14802-4.patch,
> HBASE-14802.patch
>
>
> The way dead servers are processed is that a ServerCrashProcedure is launched
> for a server after it is added to the dead servers list.
> Every time a server is added to the dead list, a counter "numProcessing" is
> incremented and it is decremented when a crash recovery procedure finishes.
> Since, adding a dead server and recovering it are two separate events, it can
> cause inconsistencies.
> If a master failover occurs in the middle of the crash recovery, the
> numProcessing counter resets but the ServerCrashProcedure is replayed by the
> new master. This causes the counter to go negative and makes the master think
> that dead servers are still in process of recovery.
> This has ramifications on the balancer that the balancer ceases to run after
> such a failover.
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