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

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?

1 answer

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?

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