ZGC Crash

[Mike Rettig]

I submitted a bug report today for an apparent ZGC crash. This is the first
ZGC crash I've seen in 2+ years of use.

internal review ID : 9070442

It looks like it is the same issue as:

https://bugs.openjdk.java.net/browse/JDK-8215754

However the crash occurred with jdk 16 so that issue should be fixed.

Current thread (0x00007f3aa0672e50):  JavaThread "PlanFinder-0" daemon
[_thread_in_Java, id=109873, stack(0x00007f3d75fe8000,0x00007f3d760e9000)]

Stack: [0x00007f3d75fe8000,0x00007f3d760e9000],  sp=0x00007f3d760e7138,
 free space=1020k
Native frames: (J=compiled Java code, A=aot compiled Java code,
j=interpreted, Vv=VM code, C=native code)
V  [libjvm.so+0xb655b0]  Method::is_method_handle_intrinsic() const+0x0
V  [libjvm.so+0x40cf52]  BarrierSetNMethod::is_armed(nmethod*)+0x12
V  [libjvm.so+0x40cc35]
 BarrierSetNMethod::nmethod_stub_entry_barrier(unsigned char**)+0x35
v  ~StubRoutines::nmethod_entry_barrier
C  0xffffffffffffffff

The bug report includes the full error log.

Mike