- When TLS is enabled for Zookeeper, NettyServerCnxnFactory will be used. It contains the issue https://github.com/apache/pulsar/issues/11070 / https://issues.apache.org/jira/browse/ZOOKEEPER-3988 - as a workaround, increase the initialDelaySeconds from 10 to 20 to reduce the likely hood of ZOOKEEPER-3988