diff --git a/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/HttpChannel.java b/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/HttpChannel.java
index a85b332f64f0..0d6c654fb8a2 100644
--- a/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/HttpChannel.java
+++ b/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/HttpChannel.java
@@ -56,7 +56,6 @@
 import org.eclipse.jetty.server.Server;
 import org.eclipse.jetty.util.BufferUtil;
 import org.eclipse.jetty.util.Callback;
-import org.eclipse.jetty.util.ExceptionUtil;
 import org.eclipse.jetty.util.HostPort;
 import org.eclipse.jetty.util.IO;
 import org.eclipse.jetty.util.SharedBlockingCallback.Blocker;
@@ -561,16 +560,7 @@ public boolean handle()
                         {
                             if (LOG.isDebugEnabled())
                                 LOG.debug("Could not perform ERROR dispatch, aborting", x);
-                            try
-                            {
-                                _response.resetContent();
-                                sendResponseAndComplete();
-                            }
-                            catch (Throwable t)
-                            {
-                                ExceptionUtil.addSuppressedIfNotAssociated(x, t);
-                                throw x;
-                            }
+                            abort(x);
                         }
                         finally
                         {
diff --git a/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/HttpOutput.java b/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/HttpOutput.java
index e4849605b04a..538b302f1b87 100644
--- a/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/HttpOutput.java
+++ b/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/HttpOutput.java
@@ -241,6 +241,15 @@ public long getWritten()
         return _written;
     }
 
+    /**
+     * Used by ServletCoreResponse when it bypasses HttpOutput to update bytes written.
+     * @param written The bytes written
+     */
+    void setBytesWritten(int written)
+    {
+        _written = written;
+    }
+
     public void reopen()
     {
         try (AutoLock l = _channelState.lock())
diff --git a/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/ServletCoreResponse.java b/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/ServletCoreResponse.java
index 0f02b0757f32..845deb5aa3c1 100644
--- a/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/ServletCoreResponse.java
+++ b/jetty-ee9/jetty-ee9-nested/src/main/java/org/eclipse/jetty/ee9/nested/ServletCoreResponse.java
@@ -137,12 +137,15 @@ public void write(boolean last, ByteBuffer byteBuffer, Callback callback)
             last = false;
         try
         {
-            if (!_wrapped && !_baseResponse.isWritingOrStreaming())
+            if (last && !_wrapped && !_baseResponse.isWritingOrStreaming())
             {
+                // We can bypass the HttpOutput stream, but we need to update its bytes written
+                _baseResponse.getHttpOutput().setBytesWritten(byteBuffer.remaining());
                 _coreResponse.write(last, byteBuffer, callback);
             }
             else
             {
+                // Write the byteBuffer via the HttpOutput stream or writer wrapping the stream
                 if (BufferUtil.hasContent(byteBuffer))
                 {
                     if (isWriting())
@@ -333,7 +336,10 @@ public Mutable add(HttpHeader header, String value)
         @Override
         public Mutable add(HttpField field)
         {
-            _response.addHeader(field.getName(), field.getValue());
+            if (field.getHeader() == HttpHeader.CONTENT_LENGTH)
+                _response.setContentLengthLong(field.getLongValue());
+            else
+                _response.addHeader(field.getName(), field.getValue());
             return this;
         }