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From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-8382) NPE in HBaseServer$Connection.readAndProcess
Date Fri, 19 Apr 2013 16:47:15 GMT
Nicolas Liochon created HBASE-8382:

             Summary: NPE in HBaseServer$Connection.readAndProcess
                 Key: HBASE-8382
                 URL: https://issues.apache.org/jira/browse/HBASE-8382
             Project: HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.95.0
            Reporter: Nicolas Liochon

2013-04-19 12:27:02,387 WARN  [IPC Server handler 8 on 60020] org.apache.hadoop.ipc.HBaseServer:
IPC Server handler 8 on 60020: caught a ClosedChannelException, this means that the server
was processing a request but the client went away. The error message was: null
2013-04-19 12:27:02,865 WARN  [IPC Server handler 9 on 60020] org.apache.hadoop.ipc.HBaseServer:
(responseTooSlow): {"processingtimems":23963,"call":"multi(org.apache.hadoop.hbase.protobuf.generated.ClientProtos$MultiRequest)","client":"","starttimems":1366388798900,"queuetimems":110004,"class":"HRegionServer","responsesize":18240,"method":"multi"}
2013-04-19 12:28:38,675 WARN  [IPC Reader 3 on port 60020] org.apache.hadoop.ipc.HBaseServer:
IPC Server listener on 60020: count of bytes read: 0
	at org.apache.hadoop.hbase.ipc.HBaseServer$Connection.readAndProcess(HBaseServer.java:1504)
	at org.apache.hadoop.hbase.ipc.HBaseServer$Listener.doRead(HBaseServer.java:803)
	at org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.doRunLoop(HBaseServer.java:596)
	at org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.java:571)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
2013-04-19 12:32:00,974 DEBUG [LRU Statistics #0] org.apache.hadoop.hbase.io.hfile.LruBlockCache:
Stats: total=10.24 MB, free=1.21 GB, max=1.22 GB, blocks=0, accesses=11822, hits=9, hitRatio=0.08%,
, cachingAccesses=11, cachingHits=7, cachingHitsRatio=63.64%, , evictions=0, evicted=4, evictedPerRun=Infinity

Given the code, it seems that the connection is closed in parallel, changing the value of
data in the middle of a "readAndProcess"
I don't know if it's related, but the client failed after a few retries.

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