Rob Vesse created HADOOP-13824:
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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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