Github user chrajeshbabu commented on a diff in the pull request: https://github.com/apache/phoenix/pull/156#discussion_r58638911 --- Diff: phoenix-core/src/main/java/org/apache/phoenix/coprocessor/GroupedAggregateRegionObserver.java --- @@ -402,8 +405,8 @@ private RegionScanner scanUnordered(ObserverContext<RegionCoprocessorEnvironment } Region region = c.getEnvironment().getRegion(); - region.startRegionOperation(); try { + region.startRegionOperation(); --- End diff -- region.startRegionOperation() prevent from splitting and also if the region already closed we are throwing NSRE. I have moved into try block only to catch NSRE and throw Stale region boundary exception.
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