--- old/src/share/vm/runtime/arguments.cpp	2017-04-27 20:13:07.740719295 -0400
+++ new/src/share/vm/runtime/arguments.cpp	2017-04-27 20:13:05.920615587 -0400
@@ -3193,8 +3193,6 @@
 
       // Enable parallel GC and adaptive generation sizing
       FLAG_SET_CMDLINE(bool, UseParallelGC, true);
-      FLAG_SET_DEFAULT(ParallelGCThreads,
-                       Abstract_VM_Version::parallel_worker_threads());
 
       // Encourage steady state memory management
       FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100);