diff -r 3054503bad7d -r caa25ab47aca src/hotspot/share/jfr/writers/jfrWriterHost.inline.hpp
--- a/src/hotspot/share/jfr/writers/jfrWriterHost.inline.hpp	Fri Sep 13 16:03:31 2019 -0700
+++ b/src/hotspot/share/jfr/writers/jfrWriterHost.inline.hpp	Sat Sep 14 14:40:09 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;
     }
   }