HP-UX11.11 JDK131_06: not able to get the thread dump when server freezes

[Manmohan]

We are running a weblogic application on HP-UX11.11 and JDK 131_06. We are also using a third party content management system which is deployed in the same weblogic.

The problem is that sometimes the weblogic server freezes i.e. simply stops responding and we are not even able to get the thread dumps during this situation. Without thread dumps its hard to find the last activity when the weblogic server freezes.

we also upgraded to JDK131_08 and then to 131_13 but still the same issues.

Please advise why this ? Its critical and in production.