Known Issues in Apache ZooKeeper

This topic describes known issues and workarounds for using Zeppelin in this release of Cloudera Runtime.

Zookeeper-client does not use ZooKeeper TLS/SSL automatically

The command-line tool ‘zookeeper-client’ is installed to all Cloudera Nodes and it can be used to start the default Java command line ZooKeeper client. However even when ZooKeeper TLS/SSL is enabled, the zookeeper-client command connects to localhost:2181, without using TLS/SSL.

Workaround:

Manually configure the 2182 port, when zookeeper-client connects to a ZooKeeper cluster.The following is an example of connecting to a specific three-node ZooKeeper cluster using TLS/SSL:

CLIENT_JVMFLAGS="-Dzookeeper.clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty -Dzookeeper.ssl.keyStore.location=<path to your configured keystore> -Dzookeeper.ssl.keyStore.password=<the password you configured for the keystore>  -Dzookeeper.ssl.trustStore.location=<path to your configured truststore> -Dzookeeper.ssl.trustStore.password=<the password you configured for the truststore> -Dzookeeper.client.secure=true" zookeeper-client -server <your.zookeeper.server-1>:2182,<your.zookeeper.server-2>:2182,<your.zookeeper.server-3>:2182