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https://issues.apache.org/jira/browse/HADOOP-995?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HADOOP-995:
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Component/s: dfs
> DataNode started with illegal startup options should print usage and stop
> -------------------------------------------------------------------------
>
> Key: HADOOP-995
> URL: https://issues.apache.org/jira/browse/HADOOP-995
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: Konstantin Shvachko
>
> Now that we have data-node startup options we should enforce them and not
> start the data-node when the options are illegal.
> Currently the data-node just ignores illegal option.
> If I start my data-node with --rack option without the argument the data-node
> prints the usage and starts anyway.
> If I provide an unspecified option, say -xxx, then even the usage message is
> not printed.
> I see an inconsistency here between the usage information and the data-node
> behavior.
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