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https://issues.apache.org/jira/browse/HBASE-9514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13767261#comment-13767261
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Enis Soztutar commented on HBASE-9514:
--------------------------------------
The balancer is not effected by this I think. Can we do the same checks in the
region move code paths?
{code:title=HMaster.balance()}
if (this.assignmentManager.getRegionStates().isRegionsInTransition()) {
Map<String, RegionState> regionsInTransition =
this.assignmentManager.getRegionStates().getRegionsInTransition();
LOG.debug("Not running balancer because " + regionsInTransition.size() +
" region(s) in transition: " + org.apache.commons.lang.StringUtils.
abbreviate(regionsInTransition.toString(), 256));
return false;
}
if (this.serverManager.areDeadServersInProgress()) {
LOG.debug("Not running balancer because processing dead
regionserver(s): " +
this.serverManager.getDeadServers());
return false;
}
{code}
> Prevent region from assigning before log splitting is done
> ----------------------------------------------------------
>
> Key: HBASE-9514
> URL: https://issues.apache.org/jira/browse/HBASE-9514
> Project: HBase
> Issue Type: Bug
> Components: Region Assignment
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
>
> If a region is assigned before log splitting is done by the server shutdown
> handler, the edits belonging to this region in the hlogs of the dead server
> will be lost.
> Generally this is not an issue if users don't assign/unassign a region from
> hbase shell or via hbase admin. These commands are marked for experts only in
> the hbase shell help too. However, chaos monkey doesn't care.
> If we can prevent from assigning such regions in a bad time, it would make
> things a little safer.
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