Nicolas Liochon created HBASE-8382:
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Summary: NPE in HBaseServer$Connection.readAndProcess
Key: HBASE-8382
URL: https://issues.apache.org/jira/browse/HBASE-8382
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.95.0
Reporter: Nicolas Liochon
{noformat}
2013-04-19 12:27:02,387 WARN [IPC Server handler 8 on 60020]
org.apache.hadoop.ipc.HBaseServer: IPC Server handler 8 on 60020: caught a
ClosedChannelException, this means that the server was processing a request but
the client went away. The error message was: null
2013-04-19 12:27:02,865 WARN [IPC Server handler 9 on 60020]
org.apache.hadoop.ipc.HBaseServer: (responseTooSlow):
{"processingtimems":23963,"call":"multi(org.apache.hadoop.hbase.protobuf.generated.ClientProtos$MultiRequest)","client":"10.240.70.79:58162","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
java.lang.NullPointerException
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
{noformat}
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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