diff -r 050803da27e5 -r 9f345a976249 src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/AsyncSSLTunnelConnection.java
--- a/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/AsyncSSLTunnelConnection.java	Mon Nov 27 14:29:38 2017 +0000
+++ b/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/AsyncSSLTunnelConnection.java	Mon Nov 27 16:40:01 2017 +0000
@@ -118,12 +118,6 @@
     }
 
     @Override
-    public void closeExceptionally(Throwable cause) {
-        debug.log(Level.DEBUG, "Closing connection: ", cause);
-        plainConnection.close();
-    }
-
-    @Override
     SSLTube getConnectionFlow() {
        return flow;
    }