diff -r a8dcacf95bff -r 1126f0607c70 src/hotspot/share/jfr/recorder/repository/jfrEmergencyDump.cpp
--- a/src/hotspot/share/jfr/recorder/repository/jfrEmergencyDump.cpp	Thu Apr 25 05:54:54 2019 -0700
+++ b/src/hotspot/share/jfr/recorder/repository/jfrEmergencyDump.cpp	Thu Apr 25 10:56:31 2019 -0400
@@ -325,7 +325,7 @@
 void JfrEmergencyDump::on_vm_error(const char* repository_path) {
   assert(repository_path != NULL, "invariant");
   ResourceMark rm;
-  MutexLockerEx stream_lock(JfrStream_lock, Mutex::_no_safepoint_check_flag);
+  MutexLocker stream_lock(JfrStream_lock, Mutex::_no_safepoint_check_flag);
   const fio_fd emergency_fd = emergency_dump_file_descriptor();
   if (emergency_fd != invalid_fd) {
     RepositoryIterator iterator(repository_path, strlen(repository_path));