Nifi Cluster - Problem to elect a Cluster Coordinator

_anjos — Tue, 07 Jun 2022 21:21:19 GMT

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="Session Timeout">10 seconds</property>

</cluster-provider>

Re: Nifi Cluster - Problem to elect a Cluster Coordinator

Wynner — Wed, 08 Jun 2022 19:33:57 GMT

@_anjos

Have you tried setting server.1=node1:2888:3888;2181

question Nifi Cluster - Problem to elect a Cluster Coordinator in Support Questions

Nifi Cluster - Problem to elect a Cluster Coordinator

Re: Nifi Cluster - Problem to elect a Cluster Coordinator