diff a/src/hotspot/share/runtime/deoptimization.cpp b/src/hotspot/share/runtime/deoptimization.cpp
--- a/src/hotspot/share/runtime/deoptimization.cpp
+++ b/src/hotspot/share/runtime/deoptimization.cpp
@@ -662,13 +662,21 @@
   Events::log_deopt_message(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d",
               p2i(stub_frame.pc()), p2i(stub_frame.sp()), exec_mode);
 
   UnrollBlock* info = array->unroll_block();
 
+  // We set the last_Java frame. But the stack isn't really parsable here. So we
+  // clear it to make sure JFR understands not to try and walk stacks from events
+  // in here.
+  intptr_t* sp = thread->frame_anchor()->last_Java_sp();
+  thread->frame_anchor()->set_last_Java_sp(NULL);
+
   // Unpack the interpreter frames and any adapter frame (c2 only) we might create.
   array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters());
 
+  thread->frame_anchor()->set_last_Java_sp(sp);
+
   BasicType bt = info->return_type();
 
   // If we have an exception pending, claim that the return type is an oop
   // so the deopt_blob does not overwrite the exception_oop.
 
@@ -800,11 +808,10 @@
       is_top_frame = false;
     }
   }
 #endif /* !PRODUCT */
 
-
   return bt;
 JRT_END
 
 class DeoptimizeMarkedClosure : public HandshakeClosure {
  public: