--- a/src/java.net.http/share/classes/jdk/internal/net/http/Http2Connection.java	Sat Mar 03 20:21:35 2018 +0000
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/Http2Connection.java	Tue Mar 06 12:09:12 2018 +0000
@@ -858,7 +858,7 @@
         Log.logFrames(sf, "OUT");
         // send preface bytes and SettingsFrame together
         HttpPublisher publisher = publisher();
-        publisher.enqueue(List.of(buf));
+        publisher.enqueueUnordered(List.of(buf));
         publisher.signalEnqueued();
         // mark preface sent.
         framesController.markPrefaceSent();