--- old/src/share/vm/gc/parallel/gcTaskManager.cpp	2016-07-01 15:34:51.679055315 -0700
+++ new/src/share/vm/gc/parallel/gcTaskManager.cpp	2016-07-01 15:34:51.559055319 -0700
@@ -399,12 +399,8 @@
   WorkerManager::log_worker_creation(this, previous_created_workers, _active_workers, _created_workers, initializing);
 }
 
-char *GCTaskManager::worker_name(uint which) {
-  if (thread(which) != NULL) {
-    return thread(which)->name();
-  } else {
-    return NULL;
-  }
+const char* GCTaskManager::group_name() {
+  return GCTaskThread::task_name();
 }
 
 void GCTaskManager::initialize() {