If ShellCommandExecutor had a toString() operator that listed the command run,
its error messages may be more meaningful
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Key: HADOOP-3852
URL: https://issues.apache.org/jira/browse/HADOOP-3852
Project: Hadoop Core
Issue Type: Improvement
Components: util
Affects Versions: 0.19.0
Reporter: Steve Loughran
Priority: Minor
It may be easier to identify what causes error commands to be returned on an
exec if the command is included in the error message. this can be done with
* a toString() operator on the class that includes the list of arguments (when
non null)
* a test that this works with arguments with spaces, and a null array
* relevant use of the operator when an execute fails, such as in TaskTracker
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