Hi everyone,   I am having some troubles with Nifi Cluster configuraition (version 1.16.2). Actually, the nodes are up and I can access them via https. But then:   When i checked the logs, the error was: WARN [main] o.a.nifi.controller.StandardFlowService There is currently no Cluster Coordinator. This often happens upon restart of NiFi when running an embedded ZooKeeper. Will register this node to become the active Cluster Coordinator and will attempt to connect to cluster again   INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=false] Attempted to register Leader Election for role 'Cluster Coordinator' but this role is already registered   WARN [Heartbeat Monitor Thread-1] o.a.n.c.l.e.CuratorLeaderElectionManager Unable to determine leader for role 'Cluster Coordinator'; returning null   I tried a lot of possible solutions, but i still got the problem   My nifi.properties configuration: nifi.cluster.is.node=true nifi.cluster.node.address=node1 nifi.cluster.node.protocol.port=9999 nifi.cluster.node.protocol.max.threads=50 nifi.cluster.node.event.history.size=25 nifi.cluster.node.connection.timeout=5 sec nifi.cluster.node.read.timeout=5 sec nifi.cluster.node.max.concurrent.requests=100 nifi.cluster.firewall.file= nifi.cluster.flow.election.max.wait.time=5 mins nifi.cluster.flow.election.max.candidates=3 nifi.cluster.load.balance.host= nifi.cluster.load.balance.port=6342 nifi.zookeeper.connect.string=node1:2181,node2:2181,node3:2181   My zookeeper.propeties configuration server.1=0.0.0.0:2888:3888;2181 server.2=node2:2888:3888;2181 server.3=node3:2888:3888;2181   My stage-management.xml configurations:     <cluster-provider>         <id>zk-provider</id>         <class>org.apache.nifi.controller.state.providers.zookeeper.ZooKeeperStateProvider</class>         <property name="Connect String">node1:2181,node2:2181,node3:2181</property>         <property name="Root Node">/nifi</property>         <property name="Session Timeout">10 seconds</property>         <property name="Access Control">Open</property>     </cluster-provider>   ... View more