Application Problem

asked 2020-01-20 12:20:34 +0000

packetac gravatar image

updated 2020-01-21 06:08:57 +0000

Hello all.

I am new here and I hope what I'll be asking will make sense.

I've only started using Wireshark and I am totally newbie at it and we are having issues with our application.

What happens is... the application compute some sort of data with what we have initially uploaded. The uploads from the endpoint get uploaded very quickly to the server hosted in Azure.

The problem is when these data are being computed by the application, the server for some reason halts between 58 to 62% and stays there. The Devs built some sort of feedback wherein the application will notify the user that the connection is lost. We've tried several times and it always fails at the same range.

Using mobile data works fine when doing the same process.

I have performed a packet capture and was thinking if these are related to the problem?

I've attached a sample trace for reference.

Thanks very much in advance.

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You'll probably have to diagnose higher up the stack or on the server.
Are there connection logs on the server?

Chuckc gravatar imageChuckc ( 2020-01-20 14:05:07 +0000 )edit

Looks like the client tries to connect every second:


And sometimes it is successful and there is a data transfer:

tcp.flags.fin==1 and tcp.time_relative > .1

Are there many clients trying to connect to the server?
Have you checked the health of the server?

Chuckc gravatar imageChuckc ( 2020-01-21 15:21:55 +0000 )edit