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    <title>question Re: Nifi Zookeeper issues with Java 11 and Nifi-1.10.0 in Support Questions</title>
    <link>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283194#M210496</link>
    <description>&lt;P&gt;Upgrading to Java 11 is a mandate across our ORG. I was able to compile ( On MAC with Java 11) and seems to be working fine. however see above issue when installing Nifi-1.10.0 with external zookeeper.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
    <pubDate>Sun, 17 Nov 2019 22:48:29 GMT</pubDate>
    <dc:creator>samarsimha</dc:creator>
    <dc:date>2019-11-17T22:48:29Z</dc:date>
    <item>
      <title>Nifi Zookeeper issues with Java 11 and Nifi-1.10.0</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283114#M210433</link>
      <description>&lt;P&gt;Hi,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;I am having issues with the zookeeper (zookeeper-3.4.13) with latest nifi version of Nifi-1.10.0 , below is the stack trace. I am upgrading from nifi-1.9.0 . &amp;nbsp;let me know if latest version of Nifi needs different version of zookeeper ? or the issue is somewhere else.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Not : With Java 8 and nifi-1.9.0 everything works&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Actual Logs using Java 11&amp;nbsp;&lt;/P&gt;
&lt;PRE&gt;2019-11-15 03:40:09,202 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: CONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,241 INFO [Curator-Framework-0] o.a.c.f.imps.CuratorFrameworkImpl backgroundOperationsLoop exiting&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,355 INFO [main] o.apache.nifi.controller.FlowController It appears that no Cluster Coordinator has been Elected yet. Registering for Cluster Coordinator Role.&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,356 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.&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,360 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Starting&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,361 INFO [main] org.apache.zookeeper.ClientCnxnSocket jute.maxbuffer value is 4194304 Bytes&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,365 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Default schema&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,371 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.&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,372 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=false] started&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,372 INFO [main] o.a.n.c.c.h.AbstractHeartbeatMonitor Heartbeat Monitor started&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,375 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: CONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,387 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@43eff6be Connection State changed to CONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,540 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: SUSPENDED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:09,540 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@43eff6be Connection State changed to SUSPENDED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:10,490 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: RECONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:10,490 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@43eff6be Connection State changed to RECONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:10,634 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: SUSPENDED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:10,636 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@43eff6be Connection State changed to SUSPENDED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:10,835 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: RECONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:10,841 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@43eff6be Connection State changed to RECONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:10,952 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: SUSPENDED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:10,959 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@43eff6be Connection State changed to SUSPENDED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:11,017 ERROR [main-EventThread] o.a.c.f.imps.CuratorFrameworkImpl Background operation retry gave up&lt;BR /&gt;&lt;BR /&gt;org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss&lt;BR /&gt;&lt;BR /&gt;at org.apache.zookeeper.KeeperException.create(KeeperException.java:102)&lt;BR /&gt;&lt;BR /&gt;at org.apache.curator.framework.imps.CuratorFrameworkImpl.checkBackgroundRetry(CuratorFrameworkImpl.java:862)&lt;BR /&gt;&lt;BR /&gt;at org.apache.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:647)&lt;BR /&gt;&lt;BR /&gt;at org.apache.curator.framework.imps.WatcherRemovalFacade.processBackgroundOperation(WatcherRemovalFacade.java:152)&lt;BR /&gt;&lt;BR /&gt;at org.apache.curator.framework.imps.FindAndDeleteProtectedNodeInBackground$2.processResult(FindAndDeleteProtectedNodeInBackground.java:104)&lt;BR /&gt;&lt;BR /&gt;at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:630)&lt;BR /&gt;&lt;BR /&gt;at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:510)&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:11,450 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: RECONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:11,455 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@43eff6be Connection State changed to RECONNECTED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:11,551 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: SUSPENDED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:11,552 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@43eff6be Connection State changed to SUSPENDED&lt;BR /&gt;&lt;BR /&gt;2019-11-15 03:40:11,552 ERROR [main-EventThread] o.a.c.f.imps.CuratorFrameworkImpl Background operation retry gave up&lt;/PRE&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Comparision of Java 8 with Nifi-1.9.0 and Java11 Nifi-1.10.0 logs below&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;PRE&gt;===================== JAVA 8 working ================================================&lt;BR /&gt;&lt;BR /&gt;2019-11-15 18:07:44,302 INFO [main] org.wali.MinimalLockingWriteAheadLog org.wali.MinimalLockingWriteAheadLog@196ca821 finished recovering records. Performing Checkpoint to ensure proper state of Partitions before updates&lt;BR /&gt;2019-11-15 18:07:44,303 INFO [main] org.wali.MinimalLockingWriteAheadLog Successfully recovered 1800 records in 18 milliseconds&lt;BR /&gt;2019-11-15 18:07:44,330 INFO [main] org.wali.MinimalLockingWriteAheadLog org.wali.MinimalLockingWriteAheadLog@196ca821 checkpointed with 1800 Records and 0 Swap Files in 26 milliseconds (Stop-the-world time = 4 milliseconds, Clear Edit Logs time = 3 millis), max Transaction ID 137772318&lt;BR /&gt;2019-11-15 18:07:45,253 INFO [main] o.a.n.c.c.node.NodeClusterCoordinator Resetting cluster node statuses from {} to {rn-ssenpcit-lapp205.rno.apple.com:8086=NodeConnectionStatus[nodeId=rn-ssenpcit-lapp205.rno.apple.com:8086, state=DISCONNECTED, Disconnect Code=Has Not Yet Connected to Cluster, Disconnect Reason=Has Not Yet Connected to Cluster, updateId=1], rn-ssenpcit-lapp206.rno.apple.com:8086=NodeConnectionStatus[nodeId=rn-ssenpcit-lapp206.rno.apple.com:8086, state=DISCONNECTED, Disconnect Code=Has Not Yet Connected to Cluster, Disconnect Reason=Has Not Yet Connected to Cluster, updateId=0]}&lt;BR /&gt;2019-11-15 18:07:45,363 INFO [main] o.a.n.r.v.FileBasedVariableRegistry Loaded 97 properties from system properties and environment variables&lt;BR /&gt;2019-11-15 18:07:45,364 INFO [main] o.a.n.r.v.FileBasedVariableRegistry Loaded a total of 97 properties. Including precedence overrides effective accessible registry key size is 97&lt;BR /&gt;2019-11-15 18:07:45,520 INFO [main] o.a.n.c.r.WriteAheadFlowFileRepository Initialized FlowFile Repository using 256 partitions&lt;BR /&gt;2019-11-15 18:07:46,240 INFO [main] o.a.n.p.store.WriteAheadStorePartition After recovering ./provenance_repository, next Event ID to be generated will be 148085136&lt;BR /&gt;2019-11-15 18:07:47,399 INFO [pool-23-thread-1] o.a.n.p.index.lucene.LuceneEventIndex Determined that Max Event ID indexed for Partition default is approximately 148084987 based on index ./provenance_repository/index-1573685499416&lt;BR /&gt;2019-11-15 18:07:47,403 INFO [pool-23-thread-1] o.a.n.p.store.WriteAheadStorePartition The last Provenance Event indexed for partition default is 148074987, but the last event written to partition has ID 148085135. Re-indexing up to the last 10148 events to ensure that the Event Index is accurate and up-to-date&lt;BR /&gt;2019-11-15 18:07:49,963 INFO [pool-23-thread-1] o.a.n.p.store.WriteAheadStorePartition Finished re-indexing 10149 events across 1 files for ./provenance_repository in 2.559 seconds&lt;BR /&gt;2019-11-15 18:07:49,973 INFO [main] o.a.n.c.repository.FileSystemRepository Maximum Threshold for Container default set to 35101377658 bytes; if volume exceeds this size, archived data will be deleted until it no longer exceeds this size&lt;BR /&gt;2019-11-15 18:07:49,975 INFO [main] o.a.n.c.repository.FileSystemRepository Initializing FileSystemRepository with 'Always Sync' set to false&lt;BR /&gt;2019-11-15 18:07:50,935 INFO [main] o.apache.nifi.controller.FlowController Checking if there is already a Cluster Coordinator Elected...&lt;BR /&gt;2019-11-15 18:07:51,015 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Starting&lt;BR /&gt;2019-11-15 18:07:51,340 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: CONNECTED&lt;BR /&gt;2019-11-15 18:07:51,362 INFO [Curator-Framework-0] o.a.c.f.imps.CuratorFrameworkImpl backgroundOperationsLoop exiting&lt;BR /&gt;2019-11-15 18:07:51,370 INFO [main] o.apache.nifi.controller.FlowController The Election for Cluster Coordinator has already begun (Leader is rn-ssenpcit-lapp206.rno.apple.com:11443). Will not register to be elected for this role until after connecting to the cluster and inheriting the cluster's flow.&lt;BR /&gt;2019-11-15 18:07:51,372 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=true] Registered new Leader Selector for role Cluster Coordinator; this node is a silent observer in the election.&lt;BR /&gt;2019-11-15 18:07:51,373 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Starting&lt;BR /&gt;2019-11-15 18:07:51,376 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=false] Registered new Leader Selector for role Cluster Coordinator; this node is a silent observer in the election.&lt;BR /&gt;2019-11-15 18:07:51,379 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=false] started&lt;BR /&gt;2019-11-15 18:07:51,379 INFO [main] o.a.n.c.c.h.AbstractHeartbeatMonitor Heartbeat Monitor started&lt;BR /&gt;2019-11-15 18:07:51,385 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: CONNECTED&lt;BR /&gt;2019-11-15 18:07:55,430 INFO [main] o.e.jetty.server.handler.ContextHandler Started o.e.j.w.WebAppContext@6ca9f1d0{nifi-api,/nifi-api,file:///ngs/app/ssewiret/nifi/work/jetty/nifi-web-api-1.9.0.war/webapp/,AVAILABLE}{./work/nar/framework/nifi-framework-nar-1.9.0.nar-unpacked/NAR-INF/bundled-dependencies/nifi-web-api-1.9.0.war}&lt;BR /&gt;2019-11-15 18:07:55,831 INFO [main] o.e.j.a.AnnotationConfiguration Scanning elapsed time=135ms&lt;BR /&gt;2019-11-15 18:07:55,862 INFO [main] o.e.j.s.h.C._nifi_content_viewer No Spring WebApplicationInitializer types detected on classpath&lt;BR /&gt;2019-11-15 18:07:56,194 INFO [main] o.e.jetty.server.handler.ContextHandler Started o.e.j.w.WebAppContext@4a467f08{nifi-content-viewer,/nifi-content-viewer,file:///ngs/app/ssewiret/nifi/work/jetty/nifi-web-content-viewer-1.9.0.war/webapp/,AVAILABLE}{./work/nar/framework/nifi-framework-nar-1.9.0.nar-unpacked/NAR-INF/bundled-dependencies/nifi-web-content-viewer-1.9.0.war}&lt;BR /&gt;2019-11-15 18:07:56,218 INFO [main] o.e.j.a.AnnotationConfiguration Scanning elapsed time=9ms&lt;BR /&gt;2019-11-15 18:07:56,219 WARN [main] o.e.j.webapp.StandardDescriptorProcessor Duplicate mapping from / to default&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;======================== JAVA 11 NOT WORKING ============================================&lt;BR /&gt;&lt;BR /&gt;2019-11-15 20:02:32,893 ERROR [main] org.apache.nifi.encrypt.StringEncryptor ********************************************************************************&lt;BR /&gt;2019-11-15 20:02:32,996 INFO [main] org.wali.MinimalLockingWriteAheadLog org.wali.MinimalLockingWriteAheadLog@56c856c0 finished recovering records. Performing Checkpoint to ensure proper state of Partitions before updates&lt;BR /&gt;2019-11-15 20:02:32,996 INFO [main] org.wali.MinimalLockingWriteAheadLog Successfully recovered 1800 records in 31 milliseconds&lt;BR /&gt;2019-11-15 20:02:33,015 INFO [main] org.wali.MinimalLockingWriteAheadLog org.wali.MinimalLockingWriteAheadLog@56c856c0 checkpointed with 1800 Records and 0 Swap Files in 19 milliseconds (Stop-the-world time = 3 milliseconds, Clear Edit Logs time = 2 millis), max Transaction ID 137772323&lt;BR /&gt;2019-11-15 20:02:33,517 INFO [main] o.a.n.c.c.node.NodeClusterCoordinator Resetting cluster node statuses from {} to {rn-ssenpcit-lapp205.rno.apple.com:8086=NodeConnectionStatus[nodeId=rn-ssenpcit-lapp205.rno.apple.com:8086, state=DISCONNECTED, Disconnect Code=Has Not Yet Connected to Cluster, Disconnect Reason=Has Not Yet Connected to Cluster, updateId=1], rn-ssenpcit-lapp206.rno.apple.com:8086=NodeConnectionStatus[nodeId=rn-ssenpcit-lapp206.rno.apple.com:8086, state=DISCONNECTED, Disconnect Code=Has Not Yet Connected to Cluster, Disconnect Reason=Has Not Yet Connected to Cluster, updateId=0]}&lt;BR /&gt;2019-11-15 20:02:33,569 INFO [main] o.a.n.r.v.FileBasedVariableRegistry Loaded 95 properties from system properties and environment variables&lt;BR /&gt;2019-11-15 20:02:33,569 INFO [main] o.a.n.r.v.FileBasedVariableRegistry Loaded a total of 95 properties. Including precedence overrides effective accessible registry key size is 95&lt;BR /&gt;2019-11-15 20:02:33,629 INFO [main] o.a.n.c.r.WriteAheadFlowFileRepository Initialized FlowFile Repository using 256 partitions&lt;BR /&gt;2019-11-15 20:02:33,768 INFO [main] o.a.n.p.store.WriteAheadStorePartition After recovering ./provenance_repository, next Event ID to be generated will be 148085136&lt;BR /&gt;2019-11-15 20:02:33,835 WARN [main] o.a.n.p.index.lucene.LuceneEventIndex Lucene Index ./provenance_repository/index-1573685499416 could not be opened. Assuming that index is defunct and will re-index events belonging to this index.&lt;BR /&gt;2019-11-15 20:02:33,835 INFO [main] o.a.n.p.index.lucene.LuceneEventIndex Determined that Lucene Index Directory ./provenance_repository/index-1573685499416 is defunct. Will destroy and rebuild index&lt;BR /&gt;2019-11-15 20:02:33,839 INFO [main] o.a.n.p.index.lucene.LuceneEventIndex Will avoid re-indexing Provenance Events because the newest index is defunct, so it will be re-indexed in the background&lt;BR /&gt;2019-11-15 20:02:33,839 INFO [main] o.a.n.p.WriteAheadProvenanceRepository Provenance Event Index indicates that no events should be re-indexed upon startup. Will not wait for re-indexing to occur.&lt;BR /&gt;2019-11-15 20:02:33,840 INFO [main] o.a.n.c.repository.FileSystemRepository Maximum Threshold for Container default set to 35101377658 bytes; if volume exceeds this size, archived data will be deleted until it no longer exceeds this size&lt;BR /&gt;2019-11-15 20:02:33,842 INFO [main] o.a.n.c.repository.FileSystemRepository Initializing FileSystemRepository with 'Always Sync' set to false&lt;BR /&gt;2019-11-15 20:02:34,199 INFO [main] o.apache.nifi.controller.FlowController Checking if there is already a Cluster Coordinator Elected...&lt;BR /&gt;2019-11-15 20:02:34,328 INFO [main] org.apache.curator.utils.Compatibility Using emulated InjectSessionExpiration&lt;BR /&gt;2019-11-15 20:02:34,456 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Starting&lt;BR /&gt;2019-11-15 20:02:34,505 INFO [main] org.apache.zookeeper.common.X509Util Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation&lt;BR /&gt;2019-11-15 20:02:34,547 INFO [main] org.apache.zookeeper.ClientCnxnSocket jute.maxbuffer value is 4194304 Bytes&lt;BR /&gt;2019-11-15 20:02:34,743 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Default schema&lt;BR /&gt;2019-11-15 20:02:34,983 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: CONNECTED&lt;BR /&gt;2019-11-15 20:02:35,083 INFO [Curator-Framework-0] o.a.c.f.imps.CuratorFrameworkImpl backgroundOperationsLoop exiting&lt;BR /&gt;2019-11-15 20:02:35,219 INFO [main] o.apache.nifi.controller.FlowController It appears that no Cluster Coordinator has been Elected yet. Registering for Cluster Coordinator Role.&lt;BR /&gt;2019-11-15 20:02:35,220 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.&lt;BR /&gt;2019-11-15 20:02:35,223 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Starting&lt;BR /&gt;2019-11-15 20:02:35,236 INFO [main] org.apache.zookeeper.ClientCnxnSocket jute.maxbuffer value is 4194304 Bytes&lt;BR /&gt;2019-11-15 20:02:35,250 INFO [main] o.a.c.f.imps.CuratorFrameworkImpl Default schema&lt;BR /&gt;2019-11-15 20:02:35,257 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.&lt;BR /&gt;2019-11-15 20:02:35,257 INFO [main] o.a.n.c.l.e.CuratorLeaderElectionManager CuratorLeaderElectionManager[stopped=false] started&lt;BR /&gt;2019-11-15 20:02:35,257 INFO [main] o.a.n.c.c.h.AbstractHeartbeatMonitor Heartbeat Monitor started&lt;BR /&gt;2019-11-15 20:02:35,283 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: CONNECTED&lt;BR /&gt;2019-11-15 20:02:35,290 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@4d490d2c Connection State changed to CONNECTED&lt;BR /&gt;2019-11-15 20:02:35,565 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: SUSPENDED&lt;BR /&gt;2019-11-15 20:02:35,568 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@4d490d2c Connection State changed to SUSPENDED&lt;BR /&gt;2019-11-15 20:02:36,567 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: RECONNECTED&lt;BR /&gt;2019-11-15 20:02:36,567 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@4d490d2c Connection State changed to RECONNECTED&lt;BR /&gt;2019-11-15 20:02:36,680 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: SUSPENDED&lt;BR /&gt;2019-11-15 20:02:36,691 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@4d490d2c Connection State changed to SUSPENDED&lt;BR /&gt;2019-11-15 20:02:36,729 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: RECONNECTED&lt;BR /&gt;2019-11-15 20:02:36,730 INFO [Curator-ConnectionStateManager-0] o.a.n.c.l.e.CuratorLeaderElectionManager org.apache.nifi.controller.leader.election.CuratorLeaderElectionManager$ElectionListener@4d490d2c Connection State changed to RECONNECTED&lt;BR /&gt;2019-11-15 20:02:36,859 INFO [main-EventThread] o.a.c.f.state.ConnectionStateManager State change: SUSPENDED&lt;/PRE&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Fri, 15 Nov 2019 21:18:31 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283114#M210433</guid>
      <dc:creator>samarsimha</dc:creator>
      <dc:date>2019-11-15T21:18:31Z</dc:date>
    </item>
    <item>
      <title>Re: Nifi Zookeeper issues with Java 11 and Nifi-1.10.0</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283191#M210494</link>
      <description>&lt;P&gt;Can anyone please help ?&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sun, 17 Nov 2019 19:19:55 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283191#M210494</guid>
      <dc:creator>samarsimha</dc:creator>
      <dc:date>2019-11-17T19:19:55Z</dc:date>
    </item>
    <item>
      <title>Re: Nifi Zookeeper issues with Java 11 and Nifi-1.10.0</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283193#M210495</link>
      <description>&lt;P&gt;&lt;a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/45465"&gt;@samarsimha&lt;/a&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;The simplest answer I can give you if compatibility!&amp;nbsp; HDF/HDP/HCP are packaged applications that have undergone rigorous unitary tests are supposed to "&lt;STRONG&gt;work as"&lt;/STRONG&gt;&amp;nbsp; that explains why you cannot upgrade &lt;STRONG&gt;ONLY&lt;/STRONG&gt; a component and upgrade minor or Major released go through a battery of test and QA to ensure all the components work properly.&lt;/P&gt;&lt;P&gt;In your case Java 7 and 8 are to date the recommended versions the latter being the most preferred.&amp;nbsp; From the matrix link&amp;nbsp;&lt;A href="https://supportmatrix.hortonworks.com/" target="_blank"&gt;https://supportmatrix.hortonworks.com/&lt;/A&gt;&amp;nbsp; &amp;nbsp;I filtered out the latest version of HDF and No HDP/HDF product has been certified against Java 11 as of now, that could change in the near future but it won't definitely be with your current version of Nifi&amp;nbsp; .&lt;BR /&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-center" image-alt="Nifi_java11.PNG" style="width: 999px;"&gt;&lt;img src="https://community.cloudera.com/t5/image/serverpage/image-id/25344i25FBCF36552535CC/image-size/large?v=v2&amp;amp;px=999" role="button" title="Nifi_java11.PNG" alt="Nifi_java11.PNG" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;So the above could explain your dilemma. Do you have a &lt;STRONG&gt;special use case&lt;/STRONG&gt; as to why you want to use &lt;STRONG&gt;Java 11&lt;/STRONG&gt;? I am not sure whether Cloudera offers a workaround but if you bought support from Cloudera then you can open a ticket.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Happy hadooping&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sun, 17 Nov 2019 20:04:15 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283193#M210495</guid>
      <dc:creator>Shelton</dc:creator>
      <dc:date>2019-11-17T20:04:15Z</dc:date>
    </item>
    <item>
      <title>Re: Nifi Zookeeper issues with Java 11 and Nifi-1.10.0</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283194#M210496</link>
      <description>&lt;P&gt;Upgrading to Java 11 is a mandate across our ORG. I was able to compile ( On MAC with Java 11) and seems to be working fine. however see above issue when installing Nifi-1.10.0 with external zookeeper.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sun, 17 Nov 2019 22:48:29 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283194#M210496</guid>
      <dc:creator>samarsimha</dc:creator>
      <dc:date>2019-11-17T22:48:29Z</dc:date>
    </item>
    <item>
      <title>Re: Nifi Zookeeper issues with Java 11 and Nifi-1.10.0</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283269#M210552</link>
      <description>&lt;P&gt;&lt;a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/45465"&gt;@samarsimha&lt;/a&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Oh well and good, are you downloading Nifi 1.10.0 from&amp;nbsp;&lt;A href="https://nifi.apache.org/download.html" target="_blank"&gt;https://nifi.apache.org/download.html&lt;/A&gt;&amp;nbsp; released just last week&amp;nbsp;&lt;SPAN&gt;November 4th, 2019&amp;nbsp; according to the documentation you&amp;nbsp; MUST upgrade to zookeeper version&amp;nbsp;3.5.5&lt;/SPAN&gt;&amp;nbsp;&amp;nbsp;which is the recommended&lt;SPAN&gt;&amp;nbsp;version.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;I am sure if you align&amp;nbsp; zookeeper version to the documentation.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;Task &lt;STRONG&gt;6624&lt;/STRONG&gt; is automatic but the &lt;STRONG&gt;6578&lt;/STRONG&gt; must be done manually&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;[&lt;A href="https://issues.apache.org/jira/browse/NIFI-6624" target="_blank"&gt;NIFI-6624&lt;/A&gt;] - Automatically migrate old embedded zookeeper.properties files to the new format&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;[&lt;A href="https://issues.apache.org/jira/browse/NIFI-6578" target="_blank"&gt;NIFI-6578&lt;/A&gt;] - Upgrade zookeeper to 3.5.5&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Hope that helps&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Mon, 18 Nov 2019 18:37:08 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283269#M210552</guid>
      <dc:creator>Shelton</dc:creator>
      <dc:date>2019-11-18T18:37:08Z</dc:date>
    </item>
    <item>
      <title>Re: Nifi Zookeeper issues with Java 11 and Nifi-1.10.0</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283272#M210555</link>
      <description>&lt;P&gt;Thanks&amp;nbsp;&lt;a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/20288"&gt;@Shelton&lt;/a&gt;&amp;nbsp;, will give it a try and update here later.&lt;/P&gt;</description>
      <pubDate>Mon, 18 Nov 2019 19:32:59 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283272#M210555</guid>
      <dc:creator>samarsimha</dc:creator>
      <dc:date>2019-11-18T19:32:59Z</dc:date>
    </item>
    <item>
      <title>Re: Nifi Zookeeper issues with Java 11 and Nifi-1.10.0</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283995#M210945</link>
      <description>&lt;P&gt;It is working fine now with 3.5.6 version of zookeeper&lt;/P&gt;</description>
      <pubDate>Mon, 25 Nov 2019 18:13:29 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Nifi-Zookeeper-issues-with-Java-11-and-Nifi-1-10-0/m-p/283995#M210945</guid>
      <dc:creator>samarsimha</dc:creator>
      <dc:date>2019-11-25T18:13:29Z</dc:date>
    </item>
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