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HBase, mail # dev - [HBaseClient] Null pointer exception in receiveResponse


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[HBaseClient] Null pointer exception in receiveResponse
Shrijeet Paliwal 2011-12-08, 01:30
Hi,
Version in which I observed issue: 0.90.3 + RPC timeout patch
Version affected : trunk

Stack trace:

2011-11-30 13:10:26,557 [IPC Client (47) connection to
inw-68.rfiserve.net/172.22.4.68:60020 from an unknown user] WARN
 org.apache.hadoop.ipc.HBaseClient - Unexpected exception receiving call
responses
java.lang.NullPointerException
>-at
org.apache.hadoop.hbase.ipc.HBaseClient$Connection.receiveResponse(HBaseClient.java:583)
>-at
org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:511)

I think line number #3 here http://pastie.org/2983633 may return a null
'call'. It is so because if you rpc timeout enable, we proactively clean up
other calls which have expired their lifetime along with the call for which
socket
timeout exception happend (refer to this method : private void
cleanupCalls(long rpcTimeout)) .

Please let me know if what I am thinking makes sense.

-Shrijeet