Hi All,

i am trying to follow the below url to setup a domain and ha cluster in wildfly 10.

https://docs.jboss.org/author/display/WFLY10/Clustering+and+Domain+Setup+WalkthroughJ

We have the two nodes running on different machines and are on the same network. The Domain setup and the cluster is running fine.  The apache httpd with mod cluster is  running running on a third machine. The mod cluster is able to pick up the 2 nodes and the load balancing is also working fine.

Apart from the configuration in the document, I have changed the binding address of the private interface in the domain.xml  to the ip address of the machine. previously it was 127.0.0.0.1.

The session replication also works fine. However there are constant error messages in the logs

2017-07-25 15:17:34,345 ERROR [org.jgroups.protocols.UDP] (INT-1,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:34,779 ERROR [org.jgroups.protocols.UDP] (INT-2,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:35,552 ERROR [org.jgroups.protocols.UDP] (INT-1,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:35,553 ERROR [org.jgroups.protocols.UDP] (INT-2,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:35,553 ERROR [org.jgroups.protocols.UDP] (INT-1,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:35,553 ERROR [org.jgroups.protocols.UDP] (INT-2,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:35,554 ERROR [org.jgroups.protocols.UDP] (INT-1,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:36,272 ERROR [org.jgroups.protocols.UDP] (INT-2,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:36,375 ERROR [org.jgroups.protocols.UDP] (INT-1,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:37,221 ERROR [org.jgroups.protocols.UDP] (INT-2,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:37,433 ERROR [org.jgroups.protocols.UDP] (INT-1,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

2017-07-25 15:17:37,691 ERROR [org.jgroups.protocols.UDP] (INT-2,ee,master:server-three) JGRP000030: master:server-three: failed handling incoming message: java.lang.NullPointerException

Any help regarding why we are seeing the above error messages even though the ha cluster seems to be working fine. And how it can be fixed?

Thanks

Sid