CSS Strange Behavior

[gplouffe]

Hi

I am not sure what is the cause of the problem. Bare with me and i will try to explain the better i can.

We have an owner with many content rules (100) load balance over six services .  What we are seeing is some the of content rule is forward to the wrong services. The Apache servers were the http request is send is reporting 404 which is what you expected because the content is not there.

This is a intermittent problem. Any of you experience this behavior

[pablo.nxh]

Hello,

Do you see this problem after the session is being established and its been working for a while and suddenly one of the request is mis-routed or does it happen right after the 3-way-handshake?

This could be a problem either with the flows being garbage collected or a persistence HTTP issue among your content rules.

Regards.

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Pablo

[gplouffe]

Hi Pablo,

First thank for replying to the thread,

I cannot confirm your comment but I think this is what is happening. Is there a way to monitor the http request to find out which services received the http request?

Does llama debug command would provide such information?

Gilles

[pablo.nxh]

Hi Gilles,

You could monitor with 3 or 4 commands to check what  services are receiving the connections on a short period of time but  given the fact that you have 100+ rules with some of them sharing the  services, it would be tremendously difficult to gather accurate data;  specially if this CSS is on a production environment where you can't  suspend services or rules in order to see different results from  differents kinds of tests.

I'd say the best way to approach this problem is to  ask a few of users/clients at what point of the connection they're  seeing the 404 response, for example:

A) Client A  connects fine - does some requests page looks as expected, in a short  period of time (say 4-5 HTTP GETs), he ends up in a different server  with a 404, same for client B,C, etc.

B) Client A  connects fine, retrieves information flawlessly from the site, he walks  away from his chair leaving the session opened, comes back an hour  later, tries to get some info but he gets 404.

Llama will not help much, it won't show detailed information about the conns being held by each service or something.

Regards

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Pablo

[gplouffe]

Hi Pablo,

What are the commands to monitor with services that is receiving the request, I would like to try it on the Lab CSS, can we set it up to monitor one rule?

Thanks

Gilles