--- a/src/hotspot/share/gc/shared/gcCause.cpp	Wed May 22 21:49:31 2019 -0700
+++ b/src/hotspot/share/gc/shared/gcCause.cpp	Thu May 23 08:09:29 2019 +0200
@@ -141,6 +141,9 @@
     case _z_proactive:
       return "Proactive";
 
+    case _z_high_usage:
+      return "High Usage";
+
     case _last_gc_cause:
       return "ILLEGAL VALUE - last gc cause - ILLEGAL VALUE";