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https://issues.apache.org/jira/browse/CASSANDRA-18745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17758740#comment-17758740
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Brandon Williams commented on CASSANDRA-18745:
----------------------------------------------

Running from the src directory isn't a problem if C* has been built:

{noformat}
$ ../bin/cqlsh
Connection error: ('Unable to connect to any servers', {'127.0.0.1:9042': 
ConnectionRefusedError(111, "Tried connecting to [('127.0.0.1', 9042)]. Last 
error: Connection refused")})
{noformat}

I'm not against printing some warning if it can't be imported instead, but will 
note this only happens with source that isn't built - binaries and packages 
will have a serverversion.py since they include a compiled server.

> cqlsh should warn on server version mismatch
> --------------------------------------------
>
>                 Key: CASSANDRA-18745
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18745
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL/Interpreter
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
>            Priority: Normal
>             Fix For: 3.0.30, 3.11.16, 4.0.12, 4.1.4, 5.0, 5.1
>
>
> When cqlsh is used against a different version of the server than the one 
> that it shipped with, it should emit a warning so that users aren't confused 
> when some things don't work correctly.



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