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I have configured Wildfly 10 in domain mode.

All configuration of Apache HTTP Sever and mode_cluster are done.

There are 2 hosts. One is master and other is slave.

There are total 4 instances of Wildfly on both hosts, 2 on each hosts.

While executing wildfly on master and slave I am getting a NullPointerException as following:

ERROR [org.jgroups.protocols.UDP] (INT-2,ee,slave1:server-two) JGRP000030: slave1:server-two: failed handling incoming message: java.lang.NullPointerException

Made lot of google but did not find any solution for this.

Why is NullPointerException is there and how can it be rectified ?

Thanks

Gabriele Mariotti
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Deepak Kumar Gupta
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  • Looks like the problem is the connection between the two servers, while discovering each other. But I need a stacktrace to be more specific.. – jojo_Berlin Jan 16 '18 at 11:30
  • What is showing in your Apache's "error.log"? If there is no important information of this problem, change the Apache log level. – Thiago Chagas - Batata Jan 17 '18 at 00:59

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