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From "Rong-En Fan (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1459) CME during memcache flush forces HRS shutdown
Date Sat, 30 May 2009 15:16:17 GMT
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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