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>
