[NIFI] "The Flow Controller is initializing the Data Flow" on UI

ruakn — Thu, 16 Sep 2021 14:53:41 GMT

Hi,

I am looking to install nifi on 3 clusters, and below is the loop which kept on running:

2021-09-16 13:34:35,324 INFO [Curator-Framework-0] o.a.c.f.state.ConnectionStateManager State change: SUSPENDED

2021-09-16 13:34:36,836 WARN [main] o.a.n.c.l.e.CuratorLeaderElectionManager Unable to determine the Elected Leader for role 'Cluster Coordinator' due to org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /nifi/leaders/Cluster Coordinator; assuming no leader has been elected

2021-09-16 13:34:36,837 INFO [Curator-Framework-0] o.a.c.f.imps.CuratorFrameworkImpl backgroundOperationsLoop exiting

2021-09-16 13:34:37,438 INFO [main] o.apache.nifi.controller.FlowController It appears that no Cluster Coordinator has been Elected yet. Registering for Cluster Coordinator Role.

2021-09-16 13:34:37,439 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=true] Registered new Leader Selector for role Cluster Coordinator; this node is an active participant in the election.

2021-09-16 13:34:37,439 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Starting

2021-09-16 13:34:37,439 INFO [main] org.apache.zookeeper.ClientCnxnSocket jute.maxbuffer value is 4194304 Bytes

2021-09-16 13:34:37,440 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Default schema

2021-09-16 13:34:37,442 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=false] Registered new Leader Selector for role Cluster Coordinator; this node is an active participant in the election.

2021-09-16 13:34:37,442 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=false] started

2021-09-16 13:34:37,442 INFO [main] o.a.n.c.c.h.AbstractHeartbeatMonitor Heartbeat Monitor started

there is no error in the logs or any hard failure.

Here is the screenshot of the error:

Thanks,

Re: [NIFI] "The Flow Controller is initializing the Data Flow" on UI

ruakn — Thu, 16 Sep 2021 16:01:33 GMT

Hey keotaixiu88, are you facing same issue or you have a solution to this problem?

question [NIFI] "The Flow Controller is initializing the Data Flow" on UI in Support Questions

[NIFI] "The Flow Controller is initializing the Data Flow" on UI

Re: [NIFI] "The Flow Controller is initializing the Data Flow" on UI