--- a/src/hotspot/share/jfr/writers/jfrWriterHost.inline.hpp	Fri May 17 15:53:21 2019 +0200
+++ b/src/hotspot/share/jfr/writers/jfrWriterHost.inline.hpp	Fri May 17 16:02:27 2019 +0200
@@ -170,7 +170,7 @@
   }
   if (this->available_size() < requested + size_safety_cushion) {
     if (!this->accommodate(this->used_size(), requested + size_safety_cushion)) {
-      this->cancel();
+      assert(!this->is_valid(), "invariant");
       return NULL;
     }
   }