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https://issues.apache.org/jira/browse/DIRMINA-1172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17758452#comment-17758452
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Emmanuel Lécharny commented on DIRMINA-1172:
--------------------------------------------
Hi, Alexender,
they do have the same IP address, but they aren't sending the data to the same
port. Now that the port is part of the session key, two sessions will be
created.
> Multiple DatagramAcceptors and the creation of a session object
> ---------------------------------------------------------------
>
> Key: DIRMINA-1172
> URL: https://issues.apache.org/jira/browse/DIRMINA-1172
> Project: MINA
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.1.5
> Reporter: Alexander B
> Priority: Major
> Attachments: DIRMINA1172.java, UDPTest4.java,
> apache-mina-2.2.3-SNAPSHOT-bin.tar.gz, mina-core-2.2.3-SNAPSHOT.jar
>
>
> Hello,
> I am using two independently created NioDatagramAcceptors, which are created
> by the following code :
> {code:java}
> AbstractIoService inputSource = new NioDatagramAcceptor();
> ((NioDatagramAcceptor) inputSource).getSessionConfig().setReuseAddress(true);
> DefaultIoFilterChainBuilder filterChainBuilderUDP =
> ((NioDatagramAcceptor)inputSource).getFilterChain();
> filterChainBuilderUDP.addLast("logger", new LoggingFilter());
> ((NioDatagramAcceptor)
> inputSource).getSessionConfig().setIdleTime(IdleStatus.READER_IDLE,
> getIdleTimeout());
> ((NioDatagramAcceptor) inputSource).setHandler(this);
> try {
> ((NioDatagramAcceptor)inputSource).bind(new InetSocketAddress(port));
> } catch (IOException e) {
> log.error("Failed to connect {}", e);
> }
> {code}
> One Acceptor is listening on port 9800, the other one on 9801. If I now send
> UDP packages (from a external application) to both ports (independently). It
> seems, that both UDP port are "connected" to the same session.
> Information: The external app is sending:
> Message "TEST_1 <timestamp>" just to port 9800
> Message "TEST_2 <timestamp>" just to port 9801
> The overwritten method messageReceived will give the following output:
> {code:java}
> public void messageReceived(IoSession session, Object message) throws
> Exception {
> String msgStr = message.toString();
> log.info("SessionId:" + session.getId() + " " + msgStr);
> }
> {code}
> 2023-04-19_11:47:35.035 [NioDatagramAcceptor-2] INFO - SessionId:1 TEST_1
> 1681904855701
> 2023-04-19_11:47:35.035 [NioDatagramAcceptor-3] INFO - SessionId:1 TEST_2
> 1681904855701
> So, both messages (for port 9800 and port 9801) are received by SessionId1.
> If I do exactly the same with `NioSocketConnector`, I can see two different
> sessions, such that both messages are handled independently:
> 2023-04-19_11:44:35.725 [NioProcessor-11] INFO - SessionId:1 TEST_1
> 1681904875701
> 2023-04-19_11:44:37.754 [NioProcessor-15] INFO - SessionId:2 TEST_2
> 1681904875701
> Is there anything I did not mention in the context of UDP/DatagramAcceptor?
> Or is there any setting, such that DatagramAcceptors can create/handle their
> own session objects?
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