The original problem was introduced with:

JDK-8313251 - Add NativeLibraryLoad event

The first attempt at resolution:

JDK-8315220 - Event NativeLibraryLoad breaks invariant by taking a stacktrace when thread is in state _thread_in_native

was reverted:

JDK-8315930 - Revert "8315220: Event NativeLibraryLoad breaks invariant by taking a stacktrace when thread is in state _thread_in_native"

because it ran into:

JDK-8315892 - NativeLibraryLoadEvent dtr fails with "assert(false) failed: Possible safepoint reached by thread that does not allow it"

The reason for JDK-8315892 was that the thread loading the zip library, in thread state native, was the owner of the Zip_lock mutex. This prevented it from transitioning to thread_in_vm.

The Zip_lock mutex was removed as part of:

JDK-8317951 - Refactor loading of zip library to help resolve JDK-8315220

Therefore, it is time to redo the original JDK-8315220, now under this issue, JDK-8319206.