Confluence 2.10.2 stopped working due to connectivity issue between cluster nodes, especially multicast traffic?

[Mervyn Fealy]

We are currently unable to access our test deployment of Confluence. The following error is present when we try to access the homepage:

Database is being updated by an instance which is not part of the current cluster. You should check network connections between cluster nodes, especially multicast traffic.

We have a 2 node Oracle RAC and we are running a clustered version of Confluence v2.10.2. Our application server is running Oracle Weblogic 9.2

I have troubleshooted the issue using the Confluence documentation online. Consequently we ran a Multicast test on both nodes. Here are the results of the Multicast Tests we ran.

on Node 1:

*****Problem*******

java.net.UnknownHostException: igb1: igb1

at java.net.InetAddress.getAllByName0(InetAddress.java:1145)

at java.net.InetAddress.getAllByName(InetAddress.java:1072)

at java.net.InetAddress.getAllByName(InetAddress.java:1008)

at java.net.InetAddress.getByName(InetAddress.java:958)

at utils.MulticastTest.<init>(MulticastTest.java:68)

at utils.MulticastTest.main(MulticastTest.java:233)

on Node 2:

*****Problem*******

java.net.UnknownHostException: igb1: igb1

at java.net.InetAddress.getAllByName0(InetAddress.java:1145)

at java.net.InetAddress.getAllByName(InetAddress.java:1072)

at java.net.InetAddress.getAllByName(InetAddress.java:1008)

at java.net.InetAddress.getByName(InetAddress.java:958)

at utils.MulticastTest.<init>(MulticastTest.java:68)

at utils.MulticastTest.main(MulticastTest.java:233)

Does anyone know how we can resolve this issue and get our test deployment of Confluence running again?

[twong_atlassian]

Looks like you're having name resolution problems: the host doesn't know what igb1 is. Try nslookup or dig from the problem host for igb1?