Re: [U2] callHTTP - disconnect?
The Connection: close header had zero impact. Checking other Apache configuration options now. ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] callHTTP - disconnect?
You can always run apache in debug mode (-X) as a single process and run it under strace to see what's going on. Glen Batchelor IT Director All-Spec Industries phone: (910) 332-0424 fax: (910) 763-5664 E-mail: webmas...@all-spec.com Web: http://www.all-spec.com Blog: http://blog.all-spec.com -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users- boun...@listserver.u2ug.org] On Behalf Of Kevin King Sent: Thursday, September 03, 2009 11:17 AM To: U2 Users List Subject: Re: [U2] callHTTP - disconnect? The Connection: close header had zero impact. Checking other Apache configuration options now. ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] callHTTP - disconnect?
Actually TIME_WAIT is normal - when you close a connection, it goes to timewait for a set amount of time and then is closed, this stops any delayed packets being accepted by a later connection. There are kernel/tcp params to determine how long it should be in timewait. If you have too many at timewait this is called TIME_WAIT loading and can have implications on server performance as each of these has a memory stack. -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Kevin King Sent: 02 September 2009 19:07 To: U2 Users List Subject: [U2] callHTTP - disconnect? I have a Unidata (6.1/AIX) program using the callHTTP API to move data out to an Apache server on a transaction by transaction basis. When the transactions get dropped into the queue slowly all is well. When the transactions get flooded in, Apache gets overwhelmed. It appears like Unidata isn't sending a disconnect after the submitRequest because the TIME_WAIT in netstat is showing excessively long disconnect times for these connections. I don't see anything in the API documentation that mentions disconnecting from the Unidata side; is there a header or option that I can set to make sure Unidata sends a disconnect after the request? -Kevin http://www.PrecisOnline.com ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] callHTTP - disconnect?
On Thu, Sep 3, 2009 at 10:10 AM, Symeon Breen syme...@gmail.com wrote: Actually TIME_WAIT is normal - when you close a connection, it goes to timewait for a set amount of time and then is closed, this stops any delayed packets being accepted by a later connection. There are kernel/tcp params to determine how long it should be in timewait. If you have too many at timewait this is called TIME_WAIT loading and can have implications on server performance as each of these has a memory stack. Yeah, I know it's normal, but when we get a couple hundred of these out here we usually get a comparable number of httpd children and the server just stops accepting new connections. We have only one Unidata instance sending these things so there shouldn't be any reason why the Apache server would stop allowing connections if each one gets disconnected in a timely manner. ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] callHTTP - disconnect?
I don't suppose it's keep-alives going bad? Glen Batchelor IT Director All-Spec Industries phone: (910) 332-0424 fax: (910) 763-5664 E-mail: webmas...@all-spec.com Web: http://www.all-spec.com Blog: http://blog.all-spec.com -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users- boun...@listserver.u2ug.org] On Behalf Of Kevin King Sent: Wednesday, September 02, 2009 2:07 PM To: U2 Users List Subject: [U2] callHTTP - disconnect? I have a Unidata (6.1/AIX) program using the callHTTP API to move data out to an Apache server on a transaction by transaction basis. When the transactions get dropped into the queue slowly all is well. When the transactions get flooded in, Apache gets overwhelmed. It appears like Unidata isn't sending a disconnect after the submitRequest because the TIME_WAIT in netstat is showing excessively long disconnect times for these connections. I don't see anything in the API documentation that mentions disconnecting from the Unidata side; is there a header or option that I can set to make sure Unidata sends a disconnect after the request? -Kevin http://www.PrecisOnline.com ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] callHTTP - disconnect?
In your apache app set the http response header 'Connection' to 'Close' -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Kevin King Sent: 02 September 2009 19:07 To: U2 Users List Subject: [U2] callHTTP - disconnect? I have a Unidata (6.1/AIX) program using the callHTTP API to move data out to an Apache server on a transaction by transaction basis. When the transactions get dropped into the queue slowly all is well. When the transactions get flooded in, Apache gets overwhelmed. It appears like Unidata isn't sending a disconnect after the submitRequest because the TIME_WAIT in netstat is showing excessively long disconnect times for these connections. I don't see anything in the API documentation that mentions disconnecting from the Unidata side; is there a header or option that I can set to make sure Unidata sends a disconnect after the request? -Kevin http://www.PrecisOnline.com ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
