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From "Jan Prach (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-4452) remove RangeKeySample from attributes in jmx
Date Tue, 24 Jul 2012 23:32:34 GMT


Jan Prach updated CASSANDRA-4452:

    Comment: was deleted

(was: "Sample" is also verb. We can rename it from getRangeKeySample() to sampleKeyRange().
> remove RangeKeySample from attributes in jmx
> --------------------------------------------
>                 Key: CASSANDRA-4452
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.1.2
>            Reporter: Jan Prach
> RangeKeySample in org.apache.cassandra.db:type=StorageService MBean can be really huge
(over 200MB in our case). That's a problem for monitoring tools as they're not build for that.
Recommended and often used mx4j may be killer in this situation.
> It would be good enough to make RangeKeySample "operation" instead of "attribute" in
jmx. Looking at how MBeanServer.registerMBean() works we can do one of the following:
> a) add some dummy parameter to getRangeKeySample
> b) name it differently - not like getter (next time somebody will rename it back)
> c) implement MXBean instead of MBean (a lot of work)
> Any of those work. All of them are "hacks". Any better idea?
> BTW: It's blocker for some installations. Our update to 1.1.2 caused downtime, downgrade
back to 1.0.x, repairs, etc.

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