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https://issues.apache.org/jira/browse/HBASE-12070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321266#comment-14321266
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Hudson commented on HBASE-12070:
--------------------------------
SUCCESS: Integrated in HBase-0.98 #853 (See
[https://builds.apache.org/job/HBase-0.98/853/])
HBASE-12070 Add an option to hbck to fix ZK inconsistencies (Stephen Yuan
Jiang) (apurtell: rev 78380e166d2026f48c332d782ad8ffa1f95a953b)
*
hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/HbckTestingUtil.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestHBaseFsck.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java
* hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKTable.java
> Add an option to hbck to fix ZK inconsistencies
> -----------------------------------------------
>
> Key: HBASE-12070
> URL: https://issues.apache.org/jira/browse/HBASE-12070
> Project: HBase
> Issue Type: Bug
> Components: hbck
> Affects Versions: 1.0.1, 1.1.0, 0.98.11
> Reporter: Sudarshan Kadambi
> Assignee: Stephen Yuan Jiang
> Fix For: 1.0.1, 1.1.0, 0.98.11
>
> Attachments: HBASE-12070.v1-0.98.patch,
> HBASE-12070.v1-branch-1.patch, HBASE-12070.v2-branch-1.patch
>
>
> If the HMaster bounces in the middle of table creation, we could be left in a
> state where a znode exists for the table, but that hasn't percolated into
> META or to HDFS. We've run into this a couple times on our clusters. Once the
> table is in this state, the only fix is to rm the znode using the
> zookeeper-client. Doing this manually looks a bit error prone. Could an
> option be added to hbck to catch and fix such inconsistencies?
> A more general issue I'd like comment on is whether it makes sense for
> HMaster to be maintaining its own write-ahead log? The idea would be that on
> a bounce, the master would discover it was in the middle of creating a table
> and either rollback or complete that operation? An issue that we observed
> recently was that a table that was in DISABLING state before a bounce was not
> in that state after. A write-ahead log to persist table state changes seems
> useful. Now, all of this state could be in ZK instead of the WAL - it doesn't
> matter where it gets persisted as long as it does.
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