[jira] [Created] (HADOOP-13824) FsShell can suppress the real error if no error message is present

["Rob Vesse (JIRA)" <ji...@apache.org>]

Rob Vesse created HADOOP-13824:
----------------------------------

             Summary: FsShell can suppress the real error if no error message is present
                 Key: HADOOP-13824
                 URL: https://issues.apache.org/jira/browse/HADOOP-13824
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs
    Affects Versions: 2.7.3, 2.7.1
            Reporter: Rob Vesse


The {{FsShell}} error handling assumes in {{displayError()}} that the {{message}} argument is not {{null}}. However in the case where it is this leads to a NPE which results in suppressing the actual error information since a higher level of error handling kicks in and just dumps the stack trace of the NPE instead.

e.g.

{noformat}
Exception in thread "main" java.lang.NullPointerException
	at org.apache.hadoop.fs.FsShell.displayError(FsShell.java:304)
	at org.apache.hadoop.fs.FsShell.run(FsShell.java:289)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
	at org.apache.hadoop.fs.FsShell.main(FsShell.java:340)
{noformat}



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