Pengfei Yan created ZOOKEEPER-3916:
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Summary: check whether zookeeperServer is null or not before
being used
Key: ZOOKEEPER-3916
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3916
Project: ZooKeeper
Issue Type: Improvement
Components: server
Reporter: Pengfei Yan
If the zookeeperServer object is null, then the client can't make connections
with servers because the Leader Voting stage is working. After checking the
Object we can avoid null pointer exception and give the IOException and close
connections.
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