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From "Rong-En Fan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1459) CME during memcache flush forces HRS shutdown
Date Sun, 31 May 2009 17:20:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714903#action_12714903
] 

Rong-En Fan commented on HBASE-1459:
------------------------------------

Nope, it's the first time I saw on this 0.19.1 instance (for two months)

> CME during memcache flush forces HRS shutdown
> ---------------------------------------------
>
>                 Key: HBASE-1459
>                 URL: https://issues.apache.org/jira/browse/HBASE-1459
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.19.1
>            Reporter: Rong-En Fan
>             Fix For: 0.20.0, 0.19.4
>
>
> I just saw this on my 0.19.1 cluster:
> 2009-05-30 03:57:19,559 FATAL org.apache.hadoop.hbase.regionserver.MemcacheFlusher: Replay
of hlog required. Forcing server shutdown
> org.apache.hadoop.hbase.DroppedSnapshotException: region: table,rowkey,1243547152622
>     at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:897)
>     at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:790)
>     at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.flushRegion(MemcacheFlusher.java:228)
>     at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.run(MemcacheFlusher.java:138)
> Caused by: java.util.ConcurrentModificationException
>     at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
>     at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
>     at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
>     at org.apache.hadoop.hbase.regionserver.HStore.internalFlushCache(HStore.java:678)
>     at org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:636)
>     at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:882)
>     ... 3 more

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