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https://issues.apache.org/jira/browse/HBASE-16816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allan Yang updated HBASE-16816:
-------------------------------
Attachment: HBASE-16816-branch-1-v2.patch
fix TestWarmupRegion UT fails
> HMaster.move() should throw exception if region to move is not online
> ---------------------------------------------------------------------
>
> Key: HBASE-16816
> URL: https://issues.apache.org/jira/browse/HBASE-16816
> Project: HBase
> Issue Type: Bug
> Components: Admin
> Affects Versions: 1.1.2
> Reporter: Allan Yang
> Assignee: Allan Yang
> Priority: Minor
> Attachments: HBASE-16816-branch-1-v2.patch, HBASE-16816-branch-1.patch
>
>
> The move region function in HMaster only checks whether the region to move
> exists
> {code}
> if (regionState == null) {
> throw new
> UnknownRegionException(Bytes.toStringBinary(encodedRegionName));
> }
> {code}
> It will not return anything if the region is split or in transition which is
> not movable. So the caller has no way to know if the move region operation is
> failed.
> It is a problem for "region_move.rb". It only gives up moving a region if a
> exception is thrown.Otherwise, it will wait until a timeout and retry.
> Without a exception, it have no idea the region is not movable.
> {code}
> begin
> admin.move(Bytes.toBytes(r.getEncodedName()), Bytes.toBytes(newServer))
> rescue java.lang.reflect.UndeclaredThrowableException,
> org.apache.hadoop.hbase.UnknownRegionException => e
> $LOG.info("Exception moving " + r.getEncodedName() +
> "; split/moved? Continuing: " + e)
> return
> end
> # Wait till its up on new server before moving on
> maxWaitInSeconds = admin.getConfiguration.getInt("hbase.move.wait.max",
> 60)
> maxWait = Time.now + maxWaitInSeconds
> while Time.now < maxWait
> same = isSameServer(admin, r, original)
> break unless same
> sleep 0.1
> end
> end
> {code}
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