cyclic ref (memory leak) fixed when request are left on sendQueue

src/remote/codec.cpp

@@ -1138,6 +1138,9 @@ namespace epics {
         // clean resources
         internalClose(true);
 
+        // this is important to avoid cyclic refs (memory leak)
+        clearSendQueue();
+
         _sendQueue.wakeup();
 
         // post close

src/remote/codec.h

@@ -168,6 +168,11 @@ namespace epics {
         }
       }
 
+      size_t size() {
+          epics::pvData::Lock lock(_queueMutex);
+          return _queue.size();
+      }
+
     private:
 
       std::deque<T> _queue;