Kevin Grigorenko

@jasonk000 @krumts Please review if you have a chance or otherwise I'll commit in a few weeks. This was tested within IBM and the user confirmed the fix. All tests...

Most commonly with containers, crash core dumps go to the worker node: https://eclipse.dev/openj9/docs/xdump/#piped-system-dumps Check `cat /proc/sys/kernel/core_pattern` and review the link above to see where. As far as the hanging `server...

> tried to convert with jpackcore but the fileformat is unknown. I also tried to convert to hprof, but was not able to. A javacore is a thread dump which...

@jorisnenscolruyt Was this taken during the `server dump` hang? If so, then I don't see that the command reached Liberty, so that suggests the `server dump` itself is hung. If...

> I was able to trigger a new javacore dump: > [javacore.20250107.200210.1.0003 copy.txt](https://github.com/user-attachments/files/18337774/?javacore.20250107.200210.1.0003.copy.txt) > This was with performing a kill -3 command. > Then I did a server dump, but...

I should add that it won't be named `core.20250107.192322.1.0001.dmp` despite the JVM writing that in the message. This is the name that the JVM wanted to name the core dump...

The core dump analysis for this issue is best handled in https://github.com/ibmruntimes/Semeru-Runtimes/issues/101 or in a support case. Based on Peter's [last comment](https://github.com/ibmruntimes/Semeru-Runtimes/issues/101#issuecomment-2580144954), it looks like `jdmpview` output won't be enough...

My guess is that the shared class cache would need to be rebuilt for the new JDK but those shared class cache errors aren't fatal; they just impact startup performance...

I noticed `debugBytecodeLoopCompressed` in the crash stack which sounds like it's related to debugging and I noticed this in your javacore: ``` 2CIUSERARG -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 ``` This enables [the Java debugger](https://eclipse.dev/openj9/docs/xrunjdwp/)....

@aardvark179 Are you able to share the dump? We're struggling to reproduce. If needed, there's an option to export a dump with redaction: https://help.eclipse.org/latest/topic/org.eclipse.mat.ui.help/tasks/exportdump.html