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https://issues.apache.org/jira/browse/HBASE-1059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-1059.
--------------------------
Resolution: Fixed
Fix Version/s: 0.19.0
Committed fix
> ConcurrentModificationException in notifyChangedReadersObservers
> ----------------------------------------------------------------
>
> Key: HBASE-1059
> URL: https://issues.apache.org/jira/browse/HBASE-1059
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Fix For: 0.19.0
>
>
> {code}
> org.apache.hadoop.hbase.DroppedSnapshotException: region: .META.,,1
> at
> org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:876)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:772)
> at
> org.apache.hadoop.hbase.regionserver.MemcacheFlusher.flushRegion(MemcacheFlusher.java:220)
> at
> org.apache.hadoop.hbase.regionserver.MemcacheFlusher.run(MemcacheFlusher.java:130)
> Caused by: java.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
> at java.util.HashMap$KeyIterator.next(HashMap.java:828)
> at
> org.apache.hadoop.hbase.regionserver.HStore.notifyChangedReadersObservers(HStore.java:734)
> at
> org.apache.hadoop.hbase.regionserver.HStore.updateReaders(HStore.java:722)
> at
> org.apache.hadoop.hbase.regionserver.HStore.internalFlushCache(HStore.java:691)
> at
> org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:627)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:863)
> ... 3 more
> {code}
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