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https://issues.apache.org/jira/browse/HBASE-4980?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shrijeet Paliwal updated HBASE-4980:
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Attachment: 0003-HBASE-4980-Fix-NPE-in-HBaseClient-receiveResponse.patch
> Null pointer exception in HBaseClient receiveResponse
> -----------------------------------------------------
>
> Key: HBASE-4980
> URL: https://issues.apache.org/jira/browse/HBASE-4980
> Project: HBase
> Issue Type: Bug
> Components: client
> Affects Versions: 0.92.0
> Reporter: Shrijeet Paliwal
> Labels: newbie
> Attachments:
> 0001-HBASE-4980-Fix-NPE-in-HBaseClient-receiveResponse.patch,
> 0002-HBASE-4980-Fix-NPE-in-HBaseClient-receiveResponse.patch,
> 0003-HBASE-4980-Fix-NPE-in-HBaseClient-receiveResponse.patch
>
>
> Relevant Stack trace:
> 2011-11-30 13:10:26,557 [IPC Client (47) connection to
> xx.xx.xx/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)
> {code}
> if (LOG.isDebugEnabled())
> LOG.debug(getName() + " got value #" + id);
> Call call = calls.remove(id);
> // Read the flag byte
> byte flag = in.readByte();
> boolean isError = ResponseFlag.isError(flag);
> if (ResponseFlag.isLength(flag)) {
> // Currently length if present is unused.
> in.readInt();
> }
> int state = in.readInt(); // Read the state. Currently unused.
> if (isError) {
> //noinspection ThrowableInstanceNeverThrown
> call.setException(new RemoteException( WritableUtils.readString(in),
> WritableUtils.readString(in)));
> } else {
> {code}
> This line {code}Call call = calls.remove(id);{code} may return a null
> 'call'. It is so because if you have rpc timeout enable, we proactively clean
> up other calls which have expired their lifetime along with the call for
> which socket timeout exception happend.
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