HBase
  1. HBase
  2. HBASE-4980

Null pointer exception in HBaseClient receiveResponse

    Details

    • Type: Bug Bug
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.92.0
    • Fix Version/s: 0.92.0
    • Component/s: Client
    • Labels:
    • Hadoop Flags:
      Reviewed

      Description

      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)

        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 {
      

      This line

      Call call = calls.remove(id);

      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.

        Activity

          People

          • Assignee:
            Shrijeet Paliwal
            Reporter:
            Shrijeet Paliwal
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            Dates

            • Created:
              Updated:
              Resolved:

              Development