Hi, I am testing nifi 2.0.0-M4 in cluster mode (secured mode). But whenever I start the second node I get the following error when connecting to nifi UI.   024-09-07 13:50:16,976 WARN [Replicate Request Thread-107] o.a.n.c.c.h.r.ThreadPoolRequestReplicator Failed to replicate request GET /nifi-api/flow/current-user to desktop:11443 java.net.ConnectException: Failed to connect to desktop/192.1.1.39:11443 at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.kt:297) at okhttp3.internal.connection.RealConnection.connect(RealConnection.kt:207) at okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.kt:226) at okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.kt:106) at okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.kt:74) at okhttp3.internal.connection.RealCall.initExchange$okhttp(RealCall.kt:255) at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.kt:32) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109) at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.kt:95) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109) at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.kt:83) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109) at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.kt:76) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109) at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:201) at okhttp3.internal.connection.RealCall.execute(RealCall.kt:154) at org.apache.nifi.cluster.coordination.http.replication.okhttp.OkHttpReplicationClient.replicate(OkHttpReplicationClient.java:139) at org.apache.nifi.cluster.coordination.http.replication.okhttp.OkHttpReplicationClient.replicate(OkHttpReplicationClient.java:133) at org.apache.nifi.cluster.coordination.http.replication.ThreadPoolRequestReplicator.replicateRequest(ThreadPoolRequestReplicator.java:648) at org.apache.nifi.cluster.coordination.http.replication.ThreadPoolRequestReplicator$NodeHttpRequest.run(ThreadPoolRequestReplicator.java:872) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) at java.base/java.lang.Thread.run(Thread.java:1583) Caused by: java.net.ConnectException: Connection refused at java.base/sun.nio.ch.Net.pollConnect(Native Method) at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:682) at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:549) at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:592) at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327) at java.base/java.net.Socket.connect(Socket.java:751) at okhttp3.internal.platform.Platform.connectSocket(Platform.kt:128) at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.kt:295) ... 24 common frames omitted   Zookeeper is running separetly. and configs in nifi property look lie that:   nifi.remote.input.socket.port=10443 nifi.web.http.port= nifi.web.https.port=11443 nifi.listener.bootstrap.port=0 nifi.cluster.node.protocol.port=12443 nifi.cluster.load.balance.port=6342 nifi.remote.input.host=<hostname> nifi.web.http.host= nifi.web.https.host=<hostname> nifi.web.proxy.host= nifi.cluster.load.balance.host=<hostname> nifi.zookeeper.connect.string=<zookeeperhost>:2181   Also each hosts file of computer is properly set, thus IP address point the same hostnames specified in the file. One computer is linux, the one in error is windows (firewall removed). SSL cert has been generated with nifi-toolkit. Everyone is reachable from a network point of view (zookeeper can ping the two nodes, and the two nodes can ping each other and also zookeeper). I am clueless right now. Thanks for your guidance   ... View more