diff -r e46b9e514479 -r cf09f0b56efd src/hotspot/share/memory/metaspaceShared.cpp
--- a/src/hotspot/share/memory/metaspaceShared.cpp	Wed Jun 27 20:04:31 2018 +0530
+++ b/src/hotspot/share/memory/metaspaceShared.cpp	Wed Jun 27 11:55:35 2018 -0400
@@ -455,6 +455,7 @@
   java_lang_StackTraceElement::serialize(soc);
   java_lang_StackFrameInfo::serialize(soc);
   java_lang_LiveStackFrameInfo::serialize(soc);
+  java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize(soc);
 }
 
 address MetaspaceShared::cds_i2i_entry_code_buffers(size_t total_size) {