--- a/src/hotspot/share/runtime/java.cpp	Thu May 09 12:56:15 2019 -0400
+++ b/src/hotspot/share/runtime/java.cpp	Thu May 09 12:04:20 2019 -0500
@@ -710,14 +710,7 @@
   int security = JDK_VERSION_SECURITY(info.jdk_version);
   int build = JDK_VERSION_BUILD(info.jdk_version);
 
-  // Incompatible with pre-4243978 JDK.
-  if (info.pending_list_uses_discovered_field == 0) {
-    vm_exit_during_initialization(
-      "Incompatible JDK is not using Reference.discovered field for pending list");
-  }
-  _current = JDK_Version(major, minor, security, info.patch_version, build,
-                         info.thread_park_blocker == 1,
-                         info.post_vm_init_hook_enabled == 1);
+  _current = JDK_Version(major, minor, security, info.patch_version, build);
 }
 
 void JDK_Version_init() {