Thanks Matt -   I am still banging my head against the wall in attempting to create a basic nifi cluster following the instructions per Apachenifi.org.   I did make the change to nifi.state.management.embedded.zookeeper.start=true.  I also confirmed that I could ping each of the clients from each other (i have copied each client's hosts file below).   I created 3 Ubuntu 22.4 clients using Oracle Virtualbox.  I have noticed that when I attempt to telnet into the ports called out for in the scripts e.g., port 2181, telnet returns an error that the connection was refused.  I did confirm that the Ubuntu firewall is disabled.   In any case, any suggestions/recommendations you might have would be tremendously appreciated!   I have provided the items that I have configured below:     nifi.properties:     nifi.state.management.embedded.zookeeper.start=true nifi.web.https.host=nifi01 nifi.cluster.is.node=true nifi.cluster.node.address=nifi01 nifi.cluster.node.protocol.port=7474 nifi.zookeeper.connect.string=nifi01:2181,nifi02:2181,nifi03:2181 nifi.cluster.flow.election.max.candidates=3 nifi.cluster.protocol.is.secure=true     state-management.xml     <cluster-provider>         <id>zk-provider</id>         <class>org.apache.nifi.controller.state.providers.zookeeper.ZooKeeperStateProvider</class>         <property name="Connect String">nifi01:2181,nifi02:2181,nifi03:2181</property>         <property name="Root Node">/nifi</property>         <property name="Session Timeout">10 seconds</property>         <property name="Access Control">Open</property>     </cluster-provider>     zookeeper.properties:   server.1=nifi01::2888:3888;2181 server.2=nifi02::2888:3888;2181 server.3=nifi03::2888:3888;2181     Additionally, created file  named myid in nifi01 in /state/zookeeper with a value of 1, myid,  a file named myid in nifi02 in same location with a value of 2,  and a file named myid in nifi03 in same location with a value of 3.       nifi01 hosts file:   27.0.0.1 localhost 127.0.1.1 nifi01   # The following lines are desirable for IPv6 capable hosts ::1     ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters   192.168.2.22    nifi02 192.168.2.23    nifi03   nifi02 hosts file:   127.0.0.1 localhost 127.0.1.1 nifi02   # The following lines are desirable for IPv6 capable hosts ::1     ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters   192.168.2.21    nifi01 192.168.2.23    nifi03   nifi03 hosts file:     127.0.0.1 localhost 127.0.1.1 nifi03   # The following lines are desirable for IPv6 capable hosts ::1     ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters   192.168.2.21    nifi01 192.168.2.22    nifi02   ... View more

hello Matt, i am following the instructions from the apache nifi web site for setting up a basic cluster. What value should I be entering into the nifi.zookeeper.root.node field?  It currently has /nifi as a value.  I installed nifi on the client to /home/dave/nifi-1.19.1.  should I set this field to "/home/dave/nifi-1.19.1?  Any guidance would be much appreciated!   ... View more

i  have been unable to get a unsecured cluster up and running following the instructions provided on the Apache nifi web site.   ... View more

Hello Matt -   I've spent hours trying to a unsecured cluster set up and running.  Regarding your suggestions: 1.  I confirmed that the nodes could resolve each other by pinging amongst the 3 nodes.  2.  I was not able to get ports free.  I kept receiving "connection refused by foreign host".  I was unable to resolve this. 3. I confirmed that the firewall in my ubuntu 22.40 clients was not active.   I am very disappointed that following the instructions on the Apache nifi site I am unable to get an unsecured cluster up and running in short order.         ... View more

Matt -   I will be able to work on this this pm. when I get home.  I will update the ticket. Thanks again for your terrific help!  I feel like I'm getting close 🙂   VR,   Dave ... View more

Thanks so much Matt!  I will definitely follow your guidance and update!     ... View more

I also created the following files (as indicated in the instructions:   a file named myid in state/zookeeper (with a value of 1) in nificlient1 a file named myid in state/zookeeper (with a value of 2) in nificient2 a file named myid in state/zookeeper (with a value of 3) in nificlient3 ... View more

Here is the repeating set of message from the nifi-app.log 2023-01-07 10:25:52,851 WARN [main] o.a.n.c.l.e.CuratorLeaderElectionManager Unable to determine leader for role 'Cluster Coordinator'; returning null org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /nifi/leaders/Cluster Coordinator at org.apache.zookeeper.KeeperException.create(KeeperException.java:102) at org.apache.zookeeper.KeeperException.create(KeeperException.java:54) at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:2480) at org.apache.curator.framework.imps.GetChildrenBuilderImpl$3.call(GetChildrenBuilderImpl.java:242) at org.apache.curator.framework.imps.GetChildrenBuilderImpl$3.call(GetChildrenBuilderImpl.java:231) at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:93) at org.apache.curator.framework.imps.GetChildrenBuilderImpl.pathInForeground(GetChildrenBuilderImpl.java:228) at org.apache.curator.framework.imps.GetChildrenBuilderImpl.forPath(GetChildrenBuilderImpl.java:219) at org.apache.curator.framework.imps.GetChildrenBuilderImpl.forPath(GetChildrenBuilderImpl.java:41) at org.apache.curator.framework.recipes.locks.LockInternals.getSortedChildren(LockInternals.java:154) at org.apache.curator.framework.recipes.locks.LockInternals.getParticipantNodes(LockInternals.java:134) at org.apache.curator.framework.recipes.locks.InterProcessMutex.getParticipantNodes(InterProcessMutex.java:170) at org.apache.curator.framework.recipes.leader.LeaderSelector.getLeader(LeaderSelector.java:337) at org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager.getLeader(CuratorLeaderElectionManager.java:281) at org.apache.nifi.cluster.coordination.node.LeaderElectionNodeProtocolSender.getServiceAddress(LeaderElectionNodeProtocolSender.java:46) at org.apache.nifi.cluster.protocol.AbstractNodeProtocolSender.requestConnection(AbstractNodeProtocolSender.java:64) at org.apache.nifi.cluster.protocol.impl.NodeProtocolSenderListener.requestConnection(NodeProtocolSenderListener.java:89) at org.apache.nifi.controller.StandardFlowService.connect(StandardFlowService.java:928) at org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:476) at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:892) at org.apache.nifi.NiFi.<init>(NiFi.java:172) at org.apache.nifi.NiFi.<init>(NiFi.java:83) at org.apache.nifi.NiFi.main(NiFi.java:332) ... View more

Hello Matt - I let nifi start for over 12 hours and it was still in an unresolved state. Here are the items I changed in each of the respective files from each of the 3 nodes: Zookeeper.properties   server.1=nificlient1:2888:3888;2181 server.2=nificlient2:2888:3888;2181 server.3=nificlient3:2888:3888;2181   nifi.properties   nifi.state.management.embedded.zookeeper.start=true nifi.cluster.protocol.is.secure=true nifi.cluster.is.node=true nifi.cluster.node.address=nificlient1 nifi.cluster.node.protocol.port=9991 nifi.cluster.flow.election.max.candidates=3 nifi.zookeeper.connect.string=nificlient1:2181,nificlient2:2181,nificlient3:2181   state-management.xml   <cluster-provider>         <id>zk-provider</id>         <class>org.apache.nifi.controller.state.providers.zookeeper.ZooKeeperStateProvider</class>         <property name="Connect String">nificlient1:2181,nificlient2:2181,nificlient3:2181</property>         <property name="Root Node">/nifi</property>         <property name="Session Timeout">10 seconds</property>         <property name="Access Control">Open</property>     </cluster-provider> Any additional suggestions/recommendations would be tremendously appreciated.   VR,   Dave ... View more

Hello Vidya -   I will have an opportunity to work with this this weekend and I certainly will mark the appropriate reply as soon as I have had an opportunity to follow Matt's guidance.  Thanks so much Vidya and Matt!   VR,   Dave ... View more