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https://issues.apache.org/jira/browse/HADOOP-7353?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daryn Sharp updated HADOOP-7353:
--------------------------------
Attachment: HADOOP-7353.patch
Cleanup exception handling in {{FsShell.run()}} method to print the stack trace
of unexpected exceptions such as NPEs.
Converted -help & -usage into {{FsCommand}} subclasses to greatly simplify the
aforementioned exception handling block. All conditional chains are now gone!
Everything is dynamic.
A few trivial changes to {{Command}} & {{CommandFactory}} to support nested
classes needed for -help/-usage to access the {{CommandFactory}}.
Break shell object instantiation, and population of commandFactory, into
separate methods so DFSAdmin (already a subclass) can eventually take advantage
of the modularity.
> Cleanup FsShell and prevent masking of RTE stacktraces
> ------------------------------------------------------
>
> Key: HADOOP-7353
> URL: https://issues.apache.org/jira/browse/HADOOP-7353
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.23.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HADOOP-7353.patch
>
>
> {{FsShell}}'s top level exception handler catches and displays exceptions.
> Unfortunately it displays only the first line of an exception, which means an
> unexpected {{RuntimeExceptions}} like {{NullPointerException}} only display
> "{{cmd: NullPointerException}}". This user has no context to understand
> and/or accurately report the issue.
> Found due to bugs such as {{HADOOP-7327}}.
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