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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-3294) WARN org.apache.hadoop.hbase.regionserver.Store: Not in set (double-remove?) org.apache.hadoop.hbase.regionserver.StoreScanner@76607d3d
Date Wed, 01 Dec 2010 19:20:12 GMT
WARN org.apache.hadoop.hbase.regionserver.Store: Not in set (double-remove?) org.apache.hadoop.hbase.regionserver.StoreScanner@76607d3d
---------------------------------------------------------------------------------------------------------------------------------------

                 Key: HBASE-3294
                 URL: https://issues.apache.org/jira/browse/HBASE-3294
             Project: HBase
          Issue Type: Bug
            Reporter: stack
             Fix For: 0.90.0


We see this ugly message in running hbase.  Its a little disorientating.  I added stack traces
around the call to close.  Here are the two I see (The WARN message is the bad one... the
INFO is the good case).  Looks like compaction is the one that triggers the WARN.

{code}
2010-12-01 18:20:28,307 WARN org.apache.hadoop.hbase.regionserver.Store: Not in set (double-remove?)
org.apache.hadoop.hbase.regionserver.StoreScanner@68faedc7
java.io.IOException: WHY
    at org.apache.hadoop.hbase.regionserver.Store.deleteChangedReaderObserver(Store.java:583)
    at org.apache.hadoop.hbase.regionserver.StoreScanner.close(StoreScanner.java:204)
    at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:242)
    at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:326)
    at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:939)
    at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:748)
    at org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:753)
    at org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:698)
    at org.apache.hadoop.hbase.regionserver.CompactSplitThread.run(CompactSplitThread.java:81)

2010-12-01 18:21:18,103 INFO org.apache.hadoop.hbase.regionserver.Store: CLOSE org.apache.hadoop.hbase.regionserver.StoreScanner@3dca256e
java.io.IOException: WHY
    at org.apache.hadoop.hbase.regionserver.Store.deleteChangedReaderObserver(Store.java:592)
    at org.apache.hadoop.hbase.regionserver.StoreScanner.close(StoreScanner.java:204)
    at org.apache.hadoop.hbase.regionserver.KeyValueHeap.close(KeyValueHeap.java:192)
    at org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.close(HRegion.java:2361)
    at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:2945)
    at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:2844)
    at org.apache.hadoop.hbase.regionserver.HRegionServer.get(HRegionServer.java:1566)
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
    at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1036)
{code}

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