Hi all, We have a client using CloudFoundry and its "jvmkill" agent. That is a tiny JVMTI agent (see https://github.com/cloudfoundry/jvmkill) which subscribes to the JVMTI ResourceExhausted Event. In the handler it then does call JVMTI FollowReferences() to produce a heap histogram.
The thing is, at our client we seem to run out of Metaspace in a compiler thread. That thread normally would swallow the Metaspace OOM and just bailout from the compilation. But as part of the metaspace OOME handling the ResourceExhausted event gets posted, the handler then uses JVMTI FollowReferences() and attempts to print out the heap histogram, then runs into a guarantee since the compiler thread cannot call java methods. My question is: are there any limitations about what one can do inside a ResourceExhausted event handler? I checked the https://docs.oracle.com/javase/8/docs/platform/jvmti/jvmti.html documentation, but I cannot find any mentioning of limitations in that case. Thanks and Best Regards, Thomas
