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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1006) Resevoir of memory not freed on OOME
Date Tue, 18 Nov 2008 21:25:44 GMT
Resevoir of memory not freed on OOME
------------------------------------

                 Key: HBASE-1006
                 URL: https://issues.apache.org/jira/browse/HBASE-1006
             Project: Hadoop HBase
          Issue Type: Bug
            Reporter: stack


Here is the OOME:

{code}
#
2008-11-17 17:04:18,812 FATAL org.apache.hadoop.hbase.regionserver.MemcacheFlusher: Replay
of hlog required. Forcing server shutdown
#
org.apache.hadoop.hbase.DroppedSnapshotException: region: streamitems,^@^@^@^@^A�?�,1226968617756
#
        at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:865)
#
        at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:761)
#
        at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.flushRegion(MemcacheFlusher.java:179)
#
        at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.flushSomeRegions(MemcacheFlusher.java:232)
#
        at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.reclaimMemcacheMemory(MemcacheFlusher.java:213)
#
        at org.apache.hadoop.hbase.regionserver.HRegionServer.batchUpdates(HRegionServer.java:1312)
#
        at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
#
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
#
        at java.lang.reflect.Method.invoke(Method.java:597)
#
        at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:634)
#
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:888)
#
Caused by: java.lang.OutOfMemoryError: GC overhead limit exceeded
#
        at org.apache.hadoop.hbase.util.Bytes.readByteArray(Bytes.java:62)
#
        at org.apache.hadoop.hbase.HStoreKey.readFields(HStoreKey.java:589)
#
        at org.apache.hadoop.io.MapFile$Writer.checkKey(MapFile.java:213)
#
        at org.apache.hadoop.io.MapFile$Writer.append(MapFile.java:192)
#
        at org.apache.hadoop.hbase.io.BloomFilterMapFile$Writer.append(BloomFilterMapFile.java:201)
#
        at org.apache.hadoop.hbase.regionserver.HStore.internalFlushCache(HStore.java:674)
#
        at org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:627)
#
        at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:852)
#
        at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:852)
{code}

Looking in heap, the resevoir had not been released.

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