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From "Suresh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5084) Cassandra should expose connected client state via JMX
Date Wed, 04 Sep 2013 07:11:51 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757514#comment-13757514
] 

Suresh commented on CASSANDRA-5084:
-----------------------------------

Hi Dave, Brandon, Robert, Jonathan,

Thank you for reviewing this. 

I added no-op method for initialization. 
Edited typo in operation name as NumOfConnectedClients

Attached patch. 

                
> Cassandra should expose connected client state via JMX
> ------------------------------------------------------
>
>                 Key: CASSANDRA-5084
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5084
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Robert Coli
>            Assignee: Suresh
>            Priority: Minor
>              Labels: lhf
>         Attachments: trunk-5084-native.patch, trunk-5084.patch, trunk-5084-sept4.patch
>
>
> There is currently no good way to determine or estimate how many clients are connected
to a cassandra node without using netstat or (if using sync thrift server) counting threads.
There is also no way to understand what state any given connection is in. People regularly
come into #cassandra/cassandra-user@ and ask how to get the equivalent of a MySQL "SHOW FULL
PROCESSLIST."
> While I understand that feature parity with SHOW FULL PROCESSLIST/information_schema.processlist
is unlikely, even a few basic metrics like "number of connected clients" or "number of active
clients" would greatly help with this operational information need.

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