zookeeper client should throttle if its not able to connect to any of the
servers.
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Key: ZOOKEEPER-522
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-522
Project: Zookeeper
Issue Type: Improvement
Affects Versions: 3.2.0
Reporter: Mahadev konar
Fix For: 3.3.0
Currently the zookeeper client library keeps connecting to servers if all of
them are unreachable. It will go through the list time and again and try to
connect. Sometimes, this might cause problems like too many clients retrying
connect to servers (and there might be something wrong/delay with servers)
wherein the clients will give up and will try reconnecting to other servers.
This causes a huge churn in client connections sometimes leading to the
zookeeper server running out of file handles.
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