Hi,
I see enormous TCP problems on my systems. All of a sudden, a perfectly working TCP session uses ZeroWindow packets, later I see TCP Full Window packets and finally the peer resets the connection. In the logs I see a lot of "core:handle_io: empty fd map" messages.
Has anyone experienced similar problems?
Regards.
Do you have heavy traffic?
Who is announcing ZeroWindow? Kamailio or the peer?
regards klaus
Gawith schrieb:
Hi,
I see enormous TCP problems on my systems. All of a sudden, a perfectly working TCP session uses ZeroWindow packets, later I see TCP Full Window packets and finally the peer resets the connection. In the logs I see a lot of "core:handle_io: empty fd map" messages.
Has anyone experienced similar problems?
Regards.
Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
There's not that much traffic. Perhaps 200 TCP packets per second. Kamailio starts with the ZeroWindow.
I also see single "core:handle_io: empty fd map" in the logs and after that Kamailio sends a TCP RST packet.
I have no clue how to debug this.
Klaus Darilion schrieb:
Do you have heavy traffic?
Who is announcing ZeroWindow? Kamailio or the peer?
regards klaus
Gawith schrieb:
Hi,
I see enormous TCP problems on my systems. All of a sudden, a perfectly working TCP session uses ZeroWindow packets, later I see TCP Full Window packets and finally the peer resets the connection. In the logs I see a lot of "core:handle_io: empty fd map" messages.
Has anyone experienced similar problems?
Regards.
Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
Usually TCP ZeroWindow means, that the TCP receive buffer is full, which usually means that Kamailio stopped reading from the TCP socket.
I never had this problem yet. You could start grepping the code for this error message to find out what happened.
regards klaus
Gawith schrieb:
There's not that much traffic. Perhaps 200 TCP packets per second. Kamailio starts with the ZeroWindow.
I also see single "core:handle_io: empty fd map" in the logs and after that Kamailio sends a TCP RST packet.
I have no clue how to debug this.
Klaus Darilion schrieb:
Do you have heavy traffic?
Who is announcing ZeroWindow? Kamailio or the peer?
regards klaus
Gawith schrieb:
Hi,
I see enormous TCP problems on my systems. All of a sudden, a perfectly working TCP session uses ZeroWindow packets, later I see TCP Full Window packets and finally the peer resets the connection. In the logs I see a lot of "core:handle_io: empty fd map" messages.
Has anyone experienced similar problems?
Regards.
Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
-
Gawith -
Klaus Darilion