Hi, for some reason, my one-node cluster always display the following error message in the log file for a dozen times (takes a while ) before everything returns to normal to allow connections via GUI. Would appreciate any help. 2020-08-04 18:28:14,296 INFO [main] o.a.nifi.controller.StandardFlowService Connecting Node: ip-172-31-33-183:8080 2020-08-04 18:28:19,452 WARN [main] o.a.nifi.controller.StandardFlowService Failed to connect to cluster due to: org.apache.nifi.cluster.protocol.ProtocolException: Failed unmarshalling 'CONNECTION_RESPONSE' protocol message from localhost/127.0.0.1:11443 due to: java.net.SocketTimeoutException: Read timed out 2020-08-04 18:28:29,578 WARN [main] o.a.nifi.controller.StandardFlowService Failed to connect to cluster due to: org.apache.nifi.cluster.protocol.ProtocolException: Failed unmarshalling 'CONNECTION_RESPONSE' protocol message from localhost/127.0.0.1:11443 due to: java.net.SocketTimeoutException: Read timed out 2020-08-04 18:28:39,661 WARN [main] o.a.nifi.controller.StandardFlowService Failed to connect to cluster due to: org.apache.nifi.cluster.protocol.ProtocolException: Failed unmarshalling 'CONNECTION_RESPONSE' protocol message from localhost/127.0.0.1:11443 due to: java.net.SocketTimeoutException: Read timed out 2020-08-04 18:28:49,785 WARN [main] o.a.nifi.controller.StandardFlowService Failed to connect to cluster due to: org.apache.nifi.cluster.protocol.ProtocolException: Failed unmarshalling 'CONNECTION_RESPONSE' protocol message from localhost/127.0.0.1:11443 due to: java.net.SocketTimeoutException: Read timed out 2020-08-04 18:28:50,682 WARN [Process Cluster Protocol Request-2] o.a.n.c.p.impl.SocketProtocolListener Failed processing protocol message from localhost due to org.apache.nifi.cluster.protocol.ProtocolException: Failed marshalling protocol message in response to message type: CONNECTION_REQUEST due to java.net.SocketException: Broken pipe (Write failed) org.apache.nifi.cluster.protocol.ProtocolException: Failed marshalling protocol message in response to message type: CONNECTION_REQUEST due to java.net.SocketException: Broken pipe (Write failed) at org.apache.nifi.cluster.protocol.impl.SocketProtocolListener.dispatchRequest(SocketProtocolListener.java:184) at org.apache.nifi.io.socket.SocketListener$2$1.run(SocketListener.java:136) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.net.SocketException: Broken pipe (Write failed) at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:111) at java.net.SocketOutputStream.write(SocketOutputStream.java:155) at sun.security.ssl.OutputRecord.writeBuffer(OutputRecord.java:431) at sun.security.ssl.OutputRecord.write(OutputRecord.java:417) at sun.security.ssl.SSLSocketImpl.writeRecordInternal(SSLSocketImpl.java:879) at sun.security.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:850) at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:123) at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:138) at java.io.DataOutputStream.writeInt(DataOutputStream.java:197) at org.apache.nifi.cluster.protocol.jaxb.JaxbProtocolContext$1.marshal(JaxbProtocolContext.java:83) at org.apache.nifi.cluster.protocol.impl.SocketProtocolListener.dispatchRequest(SocketProtocolListener.java:182) ... 4 common frames omitted
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