Hello,
We have three NiFi 1.7.1 nodes originally configured as independent instances,
each on its own server. There is no firewall between them. When I tried to
build a cluster following instructions
here<https://mintopsblog.com/2017/11/12/apache-nifi-cluster-configuration/>,
NiFi failed to start on all of them, despite the fact that I even set
nifi.cluster.protocol.is.secure=false in the nifi.properties file on each node.
Here is the error in the log files:
2018-10-10 13:57:07,506 INFO [main] org.apache.nifi.NiFi Launching NiFi...
2018-10-10 13:57:07,745 INFO [main] o.a.nifi.properties.NiFiPropertiesLoader
Determined default nifi.properties path to be
'/opt/nifi-1.7.1/./conf/nifi.properties'
2018-10-10 13:57:07,748 INFO [main] o.a.nifi.properties.NiFiPropertiesLoader
Loaded 125 properties from /opt/nifi-1.7.1/./conf/nifi.properties
2018-10-10 13:57:07,755 INFO [main] org.apache.nifi.NiFi Loaded 125 properties
2018-10-10 13:57:07,762 INFO [main] org.apache.nifi.BootstrapListener Started
Bootstrap Listener, Listening for incoming requests on port 43744
2018-10-10 13:59:15,056 ERROR [main] org.apache.nifi.NiFi Failure to launch
NiFi due to java.net.ConnectException: Connection timed out (Connection timed
out)
java.net.ConnectException: Connection timed out (Connection timed out)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at
org.apache.nifi.BootstrapListener.sendCommand(BootstrapListener.java:100)
at org.apache.nifi.BootstrapListener.start(BootstrapListener.java:83)
at org.apache.nifi.NiFi.<init>(NiFi.java:102)
at org.apache.nifi.NiFi.<init>(NiFi.java:71)
at org.apache.nifi.NiFi.main(NiFi.java:292)
2018-10-10 13:59:15,058 INFO [Thread-1] org.apache.nifi.NiFi Initiating
shutdown of Jetty web server...
2018-10-10 13:59:15,059 INFO [Thread-1] org.apache.nifi.NiFi Jetty web server
shutdown completed (nicely or otherwise).
Without clustering, the instances had no problem starting. Since this is our
first experiment building a cluster, I'm not sure where to look for clues.
Thanks in advance,
Alexander
