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Posted to hdfs-issues@hadoop.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2014/09/19 22:02:34 UTC

[jira] [Created] (HDFS-7101) Potential null dereference in DFSck#doWork()

Ted Yu created HDFS-7101:
----------------------------

             Summary: Potential null dereference in DFSck#doWork()
                 Key: HDFS-7101
                 URL: https://issues.apache.org/jira/browse/HDFS-7101
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Ted Yu
            Priority: Minor


{code}
    String lastLine = null;
    int errCode = -1;
    try {
      while ((line = input.readLine()) != null) {
...
    if (lastLine.endsWith(NamenodeFsck.HEALTHY_STATUS)) {
      errCode = 0;
{code}
If readLine() throws exception, lastLine may be null, leading to NPE.



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