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From Stack <st...@duboce.net>
Subject Coprocessor tax?
Date Tue, 01 Mar 2011 19:51:19 GMT
So, I'm debugging something else but thread dumping I see a bunch of this:


"IPC Server handler 6 on 61020" daemon prio=10 tid=0x00000000422d2800
nid=0x7714 runnable [0x00007f1c5acea000]
   java.lang.Thread.State: RUNNABLE
        at java.util.concurrent.locks.ReentrantReadWriteLock$Sync.fullTryAcquireShared(ReentrantReadWriteLock.java:434)
        at java.util.concurrent.locks.ReentrantReadWriteLock$Sync.tryAcquireShared(ReentrantReadWriteLock.java:404)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1260)
        at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:594)
        at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.prePut(RegionCoprocessorHost.java:532)
        at org.apache.hadoop.hbase.regionserver.HRegion.doMiniBatchPut(HRegion.java:1476)
        at org.apache.hadoop.hbase.regionserver.HRegion.put(HRegion.java:1454)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.multi(HRegionServer.java:2652)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:309)
        at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1060)


Do others?  I don't have any CPs loaded.  I'm wondering if we can do
more to just avoid the CP codepath if no CPs loaded.

St.Ack

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