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https://issues.apache.org/jira/browse/HBASE-4153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13097755#comment-13097755
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ramkrishna.s.vasudevan commented on HBASE-4153:
-----------------------------------------------
I was looking into this issue.
One thing just wanted to make myself clear, when HBASE-3741 was committed
{code}
if (this.regionsInTransitionInRS.contains(region.getEncodedNameAsBytes())) {
throw new RegionAlreadyInTransitionException("open",
region.getEncodedName());
}
LOG.info("Received request to open region: " +
region.getRegionNameAsString());
{code}
But now we have a case where
{code}
if (this.regionsInTransitionInRS.contains(region.getEncodedNameAsBytes())) {
throw new RegionAlreadyInTransitionException("open",
region.getEncodedName());
}
HRegion onlineRegion = this.getFromOnlineRegions(region.getEncodedName());
if (null != onlineRegion) {
LOG.warn("Attempted open of " + region.getEncodedName()
+ " but already online on this server");
return RegionOpeningState.ALREADY_OPENED;
}
{code}
Now ALREADY_OPENED case is getting handled in the AssigmentManager.assign
currently.
Pls provide your suggestions so that i can be more clear on the actual issue
that we are trying to address here and proceed further.
Correct me if my analysis is wrong.
> Handle RegionAlreadyInTransitionException in AssignmentManager
> --------------------------------------------------------------
>
> Key: HBASE-4153
> URL: https://issues.apache.org/jira/browse/HBASE-4153
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.92.0
> Reporter: Jean-Daniel Cryans
> Fix For: 0.92.0
>
>
> Comment from Stack over in HBASE-3741:
> {quote}
> Question: Looking at this patch again, if we throw a
> RegionAlreadyInTransitionException, won't we just assign the region elsewhere
> though RegionAlreadyInTransitionException in at least one case here is saying
> that the region is already open on this regionserver?
> {quote}
> Indeed looking at the code it's going to be handled the same way other
> exceptions are. Need to add special cases for assign and unassign.
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