Zookeeper problems

Symptoms	Common Causes	Common Resolutions
Cannot connect to Zookeeper	Firewall is impeding connection with the Zookeeper service. Other networking issues.	Verify that a firewall is not impeding the connection.
Zookeeper hostname or port not found or does not resolve properly	Hostname/IP Address and Port name is missing or is incorrect.	Try to connect to the Zookeeper nodes using ping or another method. Verify that the Hostname/IP Address and Port numbers are correct.