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From "cuijianwei (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10064) AggregateClient.validateParameters will throw NullPointerException when set startRow/stopRow of scan to null
Date Mon, 02 Dec 2013 08:53:35 GMT
cuijianwei created HBASE-10064:
----------------------------------

             Summary: AggregateClient.validateParameters will throw NullPointerException when
set startRow/stopRow of scan to null
                 Key: HBASE-10064
                 URL: https://issues.apache.org/jira/browse/HBASE-10064
             Project: HBase
          Issue Type: Bug
          Components: Client
    Affects Versions: 0.94.14
            Reporter: cuijianwei


When using methods such as max(...), min(...) in AggregationClient, we will pass Scan as
parameter. These methods will throw NullPointerException if users invoke scan.setStartRow(null)
or scan.setStopRow(null) before passing the scan as parameter.  The NullPointerException is
thrown by validateParameters(Scan scan) which will be invoked before sending requests  to
server. The implementation of validateParameters is :
{code}
  private void validateParameters(Scan scan) throws IOException {
    if (scan == null
        || (Bytes.equals(scan.getStartRow(), scan.getStopRow()) && !Bytes
            .equals(scan.getStartRow(), HConstants.EMPTY_START_ROW))
        || ((Bytes.compareTo(scan.getStartRow(), scan.getStopRow()) > 0) &&
        	!Bytes.equals(scan.getStopRow(), HConstants.EMPTY_END_ROW))) {
      throw new IOException(
          "Agg client Exception: Startrow should be smaller than Stoprow");
    } else if (scan.getFamilyMap().size() != 1) {
      throw new IOException("There must be only one family.");
    }
  }
{code}
“Bytes.equals(scan.getStartRow(), HConstants.EMPTY_START_ROW)” will throw NullPointerException
if the startRow of scan is set to null.



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