MemStoreFlusher blocked when enter reclaimMemStoreMemory

Thu, 07 Oct 2010 23:48:51 -0700 

I use hadoop CDH3 and hbase 0.89. When I doing heavy puts, I see the
following thread dump in one RS.
And the puts throughput drops to zero in a long time. Is this a bug? Anybody
see this before?
Thanks for any response.

"IPC Server handler 73 on 60020" tid=118 daemon=true priority=5
state=BLOCKED
        at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.reclaimMemStoreMemory
        at org.apache.hadoop.hbase.regionserver.HRegionServer.put
        at org.apache.hadoop.hbase.regionserver.HRegionServer.multiPut
        at sun.reflect.GeneratedMethodAccessor11.invoke
        at sun.reflect.DelegatingMethodAccessorImpl.invoke
        at java.lang.reflect.Method.invoke
        at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call
        at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run

"IPC Server handler 81 on 60020" tid=126 daemon=true priority=5
state=BLOCKED
        at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.reclaimMemStoreMemory
        at org.apache.hadoop.hbase.regionserver.HRegionServer.put
        at org.apache.hadoop.hbase.regionserver.HRegionServer.multiPut
        at sun.reflect.GeneratedMethodAccessor11.invoke
        at sun.reflect.DelegatingMethodAccessorImpl.invoke
        at java.lang.reflect.Method.invoke
        at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call
        at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run

"IPC Server handler 91 on 60020" tid=136 daemon=true priority=5
state=BLOCKED
        at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.reclaimMemStoreMemory
        at org.apache.hadoop.hbase.regionserver.HRegionServer.put
        at org.apache.hadoop.hbase.regionserver.HRegionServer.multiPut
        at sun.reflect.GeneratedMethodAccessor11.invoke
        at sun.reflect.DelegatingMethodAccessorImpl.invoke
        at java.lang.reflect.Method.invoke
        at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call
        at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run

"IPC Server handler 8 on 60020" tid=53 daemon=true priority=5 state=BLOCKED
        at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.reclaimMemStoreMemory
        at org.apache.hadoop.hbase.regionserver.HRegionServer.put
        at org.apache.hadoop.hbase.regionserver.HRegionServer.multiPut
        at sun.reflect.GeneratedMethodAccessor11.invoke
        at sun.reflect.DelegatingMethodAccessorImpl.invoke
        at java.lang.reflect.Method.invoke
        at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call
        at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run

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