gemmellr commented on a change in pull request #45:
URL: https://github.com/apache/qpid-jms/pull/45#discussion_r820939473



##########
File path: 
qpid-jms-client/src/main/java/org/apache/qpid/jms/transports/netty/NettyTcpTransport.java
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@@ -233,15 +228,13 @@ public void close() throws IOException {
         if (closed.compareAndSet(false, true)) {
             connected.set(false);
             try {
-                if (channel != null) {
+                if (channel != null && groupRef != null) {

Review comment:
       It didnt see like this should be changing behaviour in a noticable way, 
as the group [ref] isnt being created or closed at a different point than 
before, so it just seems odd this check of groupRef would be needed here when 
this bit doesnt actually close/release the groupRef.
   
   But actually, thinking on it more, I guess it really _does_ change the group 
behaviour; the shared executor will _continue_ running after the provider 
thinks it closed it down, if other connections are still using it. Thus with 
these changes it could continue executing things for the provider/connection 
even after we currently expect it cant. That may need further changes to 
address.




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