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From "Jie Huang (Jira)" <j...@apache.org>
Subject [jira] [Created] (ZOOKEEPER-3682) Stop initializing new SSL connection if ZK server is shutting down
Date Wed, 08 Jan 2020 16:35:00 GMT
Jie Huang created ZOOKEEPER-3682:
------------------------------------

             Summary: Stop initializing new SSL connection if ZK server is shutting down
                 Key: ZOOKEEPER-3682
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3682
             Project: ZooKeeper
          Issue Type: Improvement
          Components: server
            Reporter: Jie Huang
             Fix For: 3.6.0


ZK keeps accepting new connections while it's being shut down then immediately close them
when it finds out that the ZK server is not running. It's not a big deal before SSL is enabled
since creating TCP connections is relatively cheap.
 
With SSL being widely enabled,  creating SSL connections involves handshake that takes non-trivial
CPU time, which is wasted since the connections are closed right after. 
 
This JIRA is going to stop initializing TLS handshake if the zkServer is not serving to save
resources.



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