Joel Knighton updated CASSANDRA-11117:
    Status: Patch Available  (was: Awaiting Feedback)

I've updated the branch above to adopt the approach you described. I also 
slightly shortened the unit test since the minimum constraint unifies the two 
cases being tested. New CI runs have completed on the links above and look 
clean relative to upstream.

> ColUpdateTimeDeltaHistogram histogram overflow
> ----------------------------------------------
>                 Key: CASSANDRA-11117
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11117
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Chris Lohfink
>            Assignee: Joel Knighton
>            Priority: Minor
>             Fix For: 2.2.x, 3.0.x, 3.x, 4.x
> {code}
> getting attribute Mean of 
> org.apache.cassandra.metrics:type=ColumnFamily,name=ColUpdateTimeDeltaHistogram
>  threw an exceptionjavax.management.RuntimeMBeanException: 
> java.lang.IllegalStateException: Unable to compute ceiling for max when 
> histogram overflowed
> {code}
> Although the fact that this histogram has 164 buckets already, I wonder if 
> there is something weird with the computation thats causing this to be so 
> large? It appears to be coming from updates to system.local
> {code}
> org.apache.cassandra.metrics:type=Table,keyspace=system,scope=local,name=ColUpdateTimeDeltaHistogram
> {code}

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