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https://issues.apache.org/jira/browse/HBASE-12103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14150428#comment-14150428
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Hudson commented on HBASE-12103:
--------------------------------
FAILURE: Integrated in HBase-0.94 #1419 (See
[https://builds.apache.org/job/HBase-0.94/1419/])
HBASE-12103 Backport HFileV1Detector to 0.94. (Jeffrey Zhong) (larsh: rev
7e4d7f04e14c5197949caeacd289748be9b1bf5b)
* src/main/java/org/apache/hadoop/hbase/util/HFileV1Detector.java
> Backport HFileV1Detector to 0.94
> --------------------------------
>
> Key: HBASE-12103
> URL: https://issues.apache.org/jira/browse/HBASE-12103
> Project: HBase
> Issue Type: Task
> Reporter: Jeffrey Zhong
> Assignee: Jeffrey Zhong
> Fix For: 0.94.24
>
> Attachments: HBASE-12103.patch
>
>
> The reason of back porting is that 0.96+ HBase doesn't support HFileV1 format
> anymore. While HFileV1Detector in 0.96+, which is supposed to check v1 hfile
> before upgrade, can't talk to pre 0.96 cluster because underlying hadoop
> doesn't compatible either due to protocol buffer version bump.
> After the back port, a user can just download the latest 0.94 HBase tar ball
> in a machine, point its config to a 0.94 cluster to check v1 file existance
> by running following command:
> {code}
> ./bin/hbase org.apache.hadoop.hbase.util.HFileV1Detector -p <hbase root data
> path>
> {code}
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