--- old/src/share/vm/gc/shared/workgroup.cpp	2016-06-07 11:06:19.778538253 -0700
+++ new/src/share/vm/gc/shared/workgroup.cpp	2016-06-07 11:06:19.650538257 -0700
@@ -276,6 +276,7 @@
             "Trying to execute task %s with %u workers which is more than the amount of total workers %u.",
             task->name(), num_workers, total_workers());
   guarantee(num_workers > 0, "Trying to execute task %s with zero workers", task->name());
+  add_workers(num_workers, false);
   _dispatcher->coordinator_execute_on_workers(task, num_workers);
 }