--- old/src/hotspot/share/runtime/os.cpp	2018-05-17 15:13:19.055119208 -0400
+++ new/src/hotspot/share/runtime/os.cpp	2018-05-17 15:13:18.695085791 -0400
@@ -473,8 +473,6 @@
                             thread_oop,         // ARG 1
                             CHECK);
 
-    os::signal_init_pd();
-
     { MutexLocker mu(Threads_lock);
       JavaThread* signal_thread = new JavaThread(&signal_thread_entry);