diff -r a8dcacf95bff -r 1126f0607c70 src/hotspot/share/gc/epsilon/epsilonHeap.cpp
--- a/src/hotspot/share/gc/epsilon/epsilonHeap.cpp	Thu Apr 25 05:54:54 2019 -0700
+++ b/src/hotspot/share/gc/epsilon/epsilonHeap.cpp	Thu Apr 25 10:56:31 2019 -0400
@@ -124,7 +124,7 @@
 
   while (res == NULL) {
     // Allocation failed, attempt expansion, and retry:
-    MutexLockerEx ml(Heap_lock);
+    MutexLocker ml(Heap_lock);
 
     size_t space_left = max_capacity() - capacity();
     size_t want_space = MAX2(size, EpsilonMinHeapExpand);