diff -r b583caf69b39 -r fe2bf7b369b8 src/java.net.http/share/classes/jdk/internal/net/http/AsyncSSLConnection.java
--- a/src/java.net.http/share/classes/jdk/internal/net/http/AsyncSSLConnection.java	Thu Apr 19 16:47:52 2018 +0100
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/AsyncSSLConnection.java	Mon Apr 23 15:45:40 2018 +0100
@@ -61,6 +61,7 @@
                     // create the SSLTube wrapping the SocketTube, with the given engine
                     flow = new SSLTube(engine,
                                        client().theExecutor(),
+                                       client().getSSLBufferSupplier()::recycle,
                                        plainConnection.getConnectionFlow());
                     return null; } );
     }