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From "Nitin Phuria" <nit...@integramicro.com>
Subject Messages writen to session are not going and not generating messageSent event
Date Fri, 02 Feb 2018 07:45:33 GMT
Dear All, 

 

      We have developed one server using Apache MINA V2.0.9 where multiple
vendors connect and send the messages which needs to be processed and then
response have to be sent back to vendor. Currently we have put a strategy
that vendor has to send one message per connection and after getting
response or timeout vendor has to close the connection.
      
      We also have persistence connection open from our MINA based server
with third party server which is tcp/ip channel and for each vendor request
we get we have to send the received message to this third party server. Past
3-4 days we have observed that some of the received vendor messages when we
try to send on the third party server over persistence connection they are
actually not sent even after calling iosession.write(object message) method.
This operation is asynchronous; IoHandler.messageSent(IoSession, Object)
will be invoked when the message is actually sent to remote peer. When we
checked the netstat for that remote peer we could not see that connection
entry, but at MINA level we never receive the ConnectionClose event so that
we can reestablish the connection. Also the session.write API also does not
throw any error and keep adding the messages in the queue. We need to
restart our server to overcome the issue when such situation arises.

. 

How to identify session is not valid or disconnected.

 

I have gone through the following article. My question is why the
session.write does not through the error and just adding it in the queue to
send on session which is invalid so that handling that error we can
reconnect.

 

https://stackoverflow.com/questions/39517015/apache-mina-how-to-detect-when-
youre-sending-messages-using-an-invalid-socket

 

Thanks in advance. 

 

Thanks And Regards,
Nitin Phuria

 


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