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https://issues.apache.org/jira/browse/HBASE-4282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13127254#comment-13127254
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Hudson commented on HBASE-4282:
-------------------------------
Integrated in HBase-0.92 #64 (See
[https://builds.apache.org/job/HBase-0.92/64/])
HBASE-4282 RegionServer should abort when WAL close fails with unflushed
edits
garyh :
Files :
* /hbase/branches/0.92/CHANGES.txt
*
/hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java
*
/hbase/branches/0.92/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollAbort.java
> RegionServer should abort when WAL close encounters an error with unflushed
> edits
> ---------------------------------------------------------------------------------
>
> Key: HBASE-4282
> URL: https://issues.apache.org/jira/browse/HBASE-4282
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0, 0.94.0, 0.90.5
> Reporter: Gary Helmling
> Assignee: Gary Helmling
> Priority: Blocker
> Fix For: 0.92.0, 0.94.0, 0.90.5
>
> Attachments: HBASE-4282_0.90_2.patch, HBASE-4282_0.90_final.patch,
> HBASE-4282_0.92_final.patch, HBASE-4282_trunk_2.patch,
> HBASE-4282_trunk_3.patch, HBASE-4282_trunk_final.patch,
> HBASE-4282_trunk_prelim.patch
>
>
> The ability to ride over WAL close errors on log rolling added in HBASE-4222
> could lead to missing HLog entries if:
> * A table has DEFERRED_LOG_FLUSH=true
> * There are unflushed WALEdit entries for that table in the current
> SequenceFile writer buffer
> Since the writes were already acknowledged to the client, just ignoring the
> close error to allow for another log roll doesn't seem like the right thing
> to do here.
> We could easily flag this state and only ride over the close error if there
> aren't unflushed entries. This would bring the above condition back to the
> previous behavior of aborting the region server. However, aborting the
> region server in this state is still guaranteeing data loss. Is there
> anything we can do better in this case?
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