As part of my development work, I tried to run my Weblogic Server when I am connected to VPN network.
The weblogic server failed with error saying:
 (thread=Cluster, member=n/a): Delaying formation of a new cluster; unicast networking appears to be inoperable on interface as this process isn't receiving even its own transmissions; consider forcing IPv4 via <a href="http://-Djava.net.preferIPv" class="autolinkedURL autolinkedURL-url" target="_blank">-Djava.net.preferIPv</a>4Stack=true&gt;
We can resolve this error by setting a JAVA_OPTIONS in setDomainEnv.cmd file located in \bin folder. The setting is as follows:
set JAVA_OPTIONS=%JAVA_OPTIONS% <a href="http://-Djava.net.preferIPv" class="autolinkedURL autolinkedURL-url" target="_blank">-Djava.net.preferIPv</a>4Stack=true
Now the weblogic server starts without any issue when connected to VPN Network.
Happy Learning!!

As part of my development work, I tried to run my Weblogic Server when I am connected to VPN network.

The weblogic server failed with error saying:

<Warning> <com.oracle.coherence> <BEA-000000> <2021-07-01 16:36:49.143/122.017 Oracle Coherence GE 12.2.1.4.0 <Warning> (thread=Cluster, member=n/a): Delaying formation of a new cluster; unicast networking appears to be inoperable on interface <IP-Address> as this process isn't receiving even its own transmissions; consider forcing IPv4 via -Djava.net.preferIPv4Stack=true>

We can resolve this error by setting a JAVA_OPTIONS in setDomainEnv.cmd file located in <WL_Domain>\bin folder. The setting is as follows:

set JAVA_OPTIONS=%JAVA_OPTIONS% -Djava.net.preferIPv4Stack=true

Now the weblogic server starts without any issue when connected to VPN Network.

Happy Learning!!

Running Weblogic Server when connected to VPN