[jira] [Created] (CASSANDRA-14687) Revert parameterization of AuthCacheMBean interface

["Sam Tunnicliffe (JIRA)" <ji...@apache.org>]

Sam Tunnicliffe created CASSANDRA-14687:
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             Summary: Revert parameterization of AuthCacheMBean interface
                 Key: CASSANDRA-14687
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14687
             Project: Cassandra
          Issue Type: Bug
          Components: Auth
            Reporter: Sam Tunnicliffe
            Assignee: Sam Tunnicliffe
             Fix For: 4.0


In CASSANDRA-14662, a type parameter {{<T>}} and {{invalidate<T t>}} method were added to {{AuthCacheMBean}} with the intention that this would automatically expose via JMX the {{invalidate}} method from {{AuthCache}} itself. Actually, this is not the case, as type erasure obscures the actual type of the parameter and so JMX clients like jconsole and jmc disable access to the method. 

Only {{PasswordAuthenticator.CredentialsCache}} provided method like this previously, via {{CredentialsCacheMBean extends AuthCacheMBean}}, so the most straightforward fix is to just revert the change to {{AuthCacheMBean}}. Future/alternative cache implementations can continue to specify their own MBean interfaces to add specialised methods as before.

I should've caught this before committing the CASSANDRA-14662 as it broke a couple of dtests in AuthTest, mea culpa.




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