Add number of client connections metric in JMX and srvr
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Key: ZOOKEEPER-1321
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1321
Project: ZooKeeper
Issue Type: Improvement
Affects Versions: 3.3.4
Reporter: Neha Narkhede
The related conversation on the zookeeper user mailing list is here -
http://apache.markmail.org/message/4jjcmooniowwugu2?q=+list:org.apache.hadoop.zookeeper-user
It is useful to be able to monitor the number of disconnect operations on a
client. This is generally indicative of a client going through large number of
GC and hence disconnecting way too often from a zookeeper cluster.
Today, this information is only indirectly exposed as part of the stat command
which requires counting the results. That's alot of work for the server to do
just to get connection count.
For monitoring purposes, it will be useful to have this exposed through JMX and
4lw srvr.
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