Bug fix: async i/o sessions to not enqueue commands if the underlying channel has been closed

Author: ok2c

httpcore5/src/main/java/org/apache/hc/core5/reactor/IOSessionImpl.java

@@ -111,7 +111,7 @@ public void enqueue(final Command command, final Command.Priority priority) {
         } else {
             commandQueue.add(command);
         }
-        if (status.get() == Status.ACTIVE) {
+        if (isOpen()) {
             setEvent(SelectionKey.OP_WRITE);
         } else {
             command.cancel();

httpcore5/src/main/java/org/apache/hc/core5/reactor/ssl/SSLIOSession.java

@@ -773,7 +773,7 @@ public void enqueue(final Command command, final Command.Priority priority) {
         this.session.getLock().lock();
         try {
             this.session.enqueue(command, priority);
-            if (status == Status.ACTIVE) {
+            if (isOpen()) {
                 setEvent(SelectionKey.OP_WRITE);
             } else {
                 command.cancel();