I removed the following lines in the NotificationThread.java as suggested by
the you in the test setup and tried the same (3 clients + 1 server + 500
notifications) what we done before. We are not getting the notifications
drop every time. But if you try the same 3 or 4 times, then you will get the
notification drops in the client.
Removed lines from the NotificationThread.java
---------------------------------------------------------
buffer.release();
buffer = null;
FYI: the behavior differs in Windows & Linux. In Linux I am getting the
notification drops very often compare than windows.
Kindly help me to resolve the issue. Thanks.
Trustin Lee wrote:
>
> It's unlikely that MINA misses any data unless there's disconnection.
>
> It might be because you are releasing the buffer unnecessarily.
> Please remove the two lines (buffer.release() and buffer = null).
> Also, make sure no exception is caught in your IoHandler
> implementation.
>
> There's also possibility you are not taking care of TCP/IP packet
> fragmentation in NotificationObject.getObject(...) (i.e. two messages
> are received in one ByteBuffer.)
>
> Trustin
>
> On Dec 11, 2007 11:11 PM, AmalRaj P <[EMAIL PROTECTED]> wrote:
>>
>> In my project I am using MINA framework for notification, with multiple
>> clients in place I faced packet loss issues.
>>
>> Then I planned to setup a sample environment with a server and three
>> clients
>> connected to it.
>>
>> Server:
>>
>> Will publish numbers generated in loop to all clients
>> connected/registered
>>
>> public void run()
>> {
>> IoSession session = null;
>> int j = 0;
>> while (j < 500)
>> {
>> for (int i = 0; i < sessions.size(); i++)
>> {
>> String msg = "For client " + i + " value sent is:" + j;
>> System.out.println(msg);
>> byte data[] = NotificationObject.getBytes(new
>> String(msg));
>> ByteBuffer buffer = ByteBuffer.wrap(data);
>> session = (IoSession) sessions.get(i);
>> session.write(buffer);
>> buffer.release();
>> buffer = null;
>>
>> }
>> j++;
>> }
>> }
>>
>>
>> Client:
>>
>> Will just receive the message and print it
>>
>> public void messageReceived(IoSession session, Object message)
>> {
>> ByteBuffer buffer = (ByteBuffer) message;
>> byte[] data = new byte[buffer.remaining()];
>> buffer.get(data);
>> Object obj = NotificationObject.getObject(data);
>> System.out.println("ClientHandler : data received is : " + obj);
>> }
>>
>>
>> Results:
>>
>> Client1 Missed: 203, 253, 293
>>
>> Client2 Missed: 204, 252
>>
>> Client3 Missed: 247, 252
>>
>> I don't know why I am getting packet loss in the Client side. Need some
>> help
>> as every single notification in our process cannot be missed.
>>
>> I have attached the test setup. Just use the batch files inside bin.
>> Sample
>> logs where you can see the issues are also available.
>> http://www.nabble.com/file/p14274506/MinaTestSetup.zip MinaTestSetup.zip
>> --
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>> Sent from the Apache MINA Support Forum mailing list archive at
>> Nabble.com.
>>
>>
>
>
>
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