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https://issues.apache.org/jira/browse/CASSANDRA-9105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14393304#comment-14393304
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Tyler Hobbs commented on CASSANDRA-9105:
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I recently added a JMX utility module to the dtests that should make this
easier to cover:
https://github.com/riptano/cassandra-dtest/blob/master/jmxutils.py
> JMX APIs appear untested
> ------------------------
>
> Key: CASSANDRA-9105
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9105
> Project: Cassandra
> Issue Type: Test
> Reporter: Ariel Weisberg
>
> Anything supported via JMX is part of the public API of the database.
> Node tool uses JMX but doesn't seem to have its own unit test and the dtest
> nodetool_test.py is pretty sparse.
> For values returned by JMX for the purposes of reporting we should test as
> best we can that we are getting "real" values end to end. Occasionally
> metrics end up with no values, or values in the wrong units.
> For commands going the other direction they should be exercised. There is
> probably a lot of coverage of commands since they may be used when testing
> the features those commands are a part of so no need for duplication there.
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