[jira] [Created] (CASSANDRA-15661) Improve logging by using more appropriate levels

["Jon Haddad (Jira)" <ji...@apache.org>]

Jon Haddad created CASSANDRA-15661:
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             Summary:  Improve logging by using more appropriate levels
                 Key: CASSANDRA-15661
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15661
             Project: Cassandra
          Issue Type: Improvement
          Components: Observability/Logging
            Reporter: Jon Haddad
            Assignee: Jon Haddad


There are a number of log statements using logging levels that are a bit too conservative.  For example:

* Flushing memtables is currently at debug.  This is a relatively rare event that is important enough to be INFO
* When compaction finishes we log the progress at debug
* Different steps in incremental repair are logged as debug, should be INFO
* when reaching connection limits in ConnectionLimitHandler.java we log at warn rather than error.  Since this is a client disconnect it’s more than a warning, we’re taking action and disconnecting.




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