}
executor.shutdown();
- selector = null;
msgReadWriteService = null;
if (switchHandlerThread != null) {
List<OFMessage> msgs = null;
try {
- msgs = msgReadWriteService.readMessages();
+ if (msgReadWriteService != null) {
+ msgs = msgReadWriteService.readMessages();
+ }
} catch (Exception e) {
reportError(e);
}