Support Questions

Find answers, ask questions, and share your expertise

Failed to connect node to cluster because local flow is different than cluster flow.

avatar

Hi,

I am configured HDF 3.0.1 with 3 nodes : HDF1 (Primary), HDF2 and HDF3, There was Out of Disk space issues on HDF1 and HDF3, after recovery HDF1 is not starting up with below error.

nifi-app.log

2017-12-21 16:37:47,462 ERROR [main] o.a.nifi.controller.StandardFlowService Failed to load flow from cluster due to: org.apache.nifi.controller.UninheritableFlowException: Failed to connect node to cluster because local flow is different than cluster flow. org.apache.nifi.controller.UninheritableFlowException: Failed to connect node to cluster because local flow is different than cluster flow. at org.apache.nifi.controller.StandardFlowService.loadFromConnectionResponse(StandardFlowService.java:936) at org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:515) at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:800) at org.apache.nifi.NiFi.<init>(NiFi.java:160) at org.apache.nifi.NiFi.main(NiFi.java:267) Caused by: org.apache.nifi.controller.UninheritableFlowException: Proposed configuration is not inheritable by the flow controller because of flow differences: Found difference in Flows: Local Fingerprint: 7c84501d-d10c-407c-b9f3-1d80e38fe36a3b80ba0f-a6c0-48db-b721-4dbc04cef28eorg.apache.nifi.reporting.ambari.AmbariReportingTaskAmbariReport Cluster Fingerprint: 7c84501d-d10c-407c-b9f3-1d80e38fe36a826ffb50-015e-1000-ffff-ffffd8f61569org.apache.nifi.processors.standard.ExtractTextNO_VALUEorg.apach at org.apache.nifi.controller.StandardFlowSynchronizer.sync(StandardFlowSynchronizer.java:259) at org.apache.nifi.controller.FlowController.synchronize(FlowController.java:1576) at org.apache.nifi.persistence.StandardXMLFlowConfigurationDAO.load(StandardXMLFlowConfigurationDAO.java:84) at org.apache.nifi.controller.StandardFlowService.loadFromBytes(StandardFlowService.java:722) at org.apache.nifi.controller.StandardFlowService.loadFromConnectionResponse(StandardFlowService.java:911) ... 4 common frames omitted 2017-12-21 16:37:47,463 INFO [main] o.a.n.c.c.node.NodeClusterCoordinator HDF1:9090 requested disconnection from cluster due to org.apache.nifi.controller.UninheritableFlowException: Failed to connect node to cluster because local flow is different than cluster flow. 2017-12-21 16:37:47,463 INFO [main] o.a.n.c.c.node.NodeClusterCoordinator Status of HDF1:9090 changed from NodeConnectionStatus[nodeId=HDF1:9090, state=CONNECTING, updateId=7] to NodeConnectionStatus[nodeId=HDF1:9090, state=DISCONNECTED, Disconnect Code=Node's Flow did not Match Cluster Flow, Disconnect Reason=org.apache.nifi.controller.UninheritableFlowException: Failed to connect node to cluster because local flow is different than cluster flow., updateId=7] 2017-12-21 16:37:47,482 ERROR [main]

o.a.n.c.c.node.NodeClusterCoordinator Event Reported for HDF1:9090 -- Node disconnected from cluster due to org.apache.nifi.controller.UninheritableFlowException:Failed to connect node to cluster because local flow is different than cluster flow. 2017-12-21 16:37:47,482 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager Cannot unregister Leader Election Role 'Primary Node' becuase that role is not registered 2017-12-21 16:37:47,483 WARN [main]

org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. java.lang.IllegalStateException: Already closed or has not been started at com.google.common.base.Preconditions.checkState(Preconditions.java:173) at org.apache.curator.framework.recipes.leader.LeaderSelector.close(LeaderSelector.java:270) at org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager.unregister(CuratorLeaderElectionManager.java:151) at org.apache.nifi.controller.FlowController.setClustered(FlowController.java:3744) at org.apache.nifi.controller.StandardFlowService.handleConnectionFailure(StandardFlowService.java:554) at org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:518) at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:800) at org.apache.nifi.NiFi.<init>(NiFi.java:160) at org.apache.nifi.NiFi.main(NiFi.java:267) 2017-12-21 16:37:47,484 INFO [Thread-1] org.apache.nifi.NiFi Initiating shutdown of Jetty web server... 2017-12-21 16:37:47,496 INFO [Thread-1] o.eclipse.jetty.server.AbstractConnector Stopped ServerConnector@672c6b93{HTTP/1.1,[http/1.1]}{HDF1:9090} 2017-12-21 16:37:47,497 INFO [Thread-1] org.eclipse.jetty.server.session Stopped scavenging

1 REPLY 1

avatar
Master Guru

Shut everything down and copy flow.xml.gz from one of the other nodes to HDF1 which will get HDF1 back in sync.

If you are running securely and using NiFI's file-based authorizer, then you will also want to copy users.xml and authorizations.xml from one of the other nodes to HDF1, because those are also factored into joining the cluster.