Client /server outage
Hello ,
I have issue with TCP/IP server that exchange data with clients dcl (xml) format , the issue occurs once a day , sometimes twice , and goes as follows suddenly all clients cannot connect to the server , while on the server itself, the server is still appear to be listening and seems to be operational , but no connection could be done.
During normal communication the data exchange finish with RST deliberately to avoid "TCP Time wait" as attached below
https://drive.google.com/open?id=0B0a...
The server run under Windows 2008R2 , we made sure that firewall and base filtering service is off
During the Wireshark trace on it , we can see that prior to the indecent several clients announce Zero Window
https://drive.google.com/open?id=0B0a...
https://drive.google.com/open?id=0B0a...
, but i don't know if its related , During the incident we can see clearly that's server kind of rejecting connection but we not sure of the source , since as for server logs seems to operate ok, and he exchange data with others same type of servers during the clients outage as seen blows image.
https://drive.google.com/open?id=0B0a...
Now we are kind of stucked , and hope someone could pin point something I missed trace is shared here Thanks Please advice
You have said you close all the sessions with an RST. But in the trace I can see a lot of session wich are closed by a normal FIN handshake?
Hi Christian Thanks for noticing it , you right, on your opinion could it be that server waits for RST and clients for some reason sends FIN can cause that effect ?
At the moment I can´t say it. As I need to have a deeper look into the tracefile.