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https://issues.apache.org/jira/browse/CASSANDRA-807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837287#action_12837287
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Jonathan Ellis commented on CASSANDRA-807:
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I don't suppose this fixes CASSANDRA-738 too?

> Improve cassandra-cli error display and thrift connection checking
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-807
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-807
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>         Environment: Java
>            Reporter: Mark Wolfe
>         Attachments: cassandra-cli-cleanup.patch
>
>
> A new user observed that thier was some ambiguous error messages presented by 
> the cassandra CLI if you connected to the wrong port on the cassandra daemon, 
> or in fact anything else listening for a tcp connection. The CLI will say 
> "connected" but when you run any of the commands a thrift exception will be 
> displayed.
> So I suggest the following enhancements:
> * Verify that the CLI is indeed connected to a thrift port by requesting the 
> cluster name
> * Hide as many of the stack traces as possible displaying a simple error 
> message
> * Implement a --debug argument to the CLI which will output stacktraces

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