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Posted to users@httpd.apache.org by DICKEY Rob <Ro...@3ds.com> on 2021/02/16 15:52:06 UTC
[users@httpd] stickysession and BalancerMember route
I am observing problems with mod_proxy_balancer's sticky session handling when either the length of the route attribute of the BalancerMember is > x length, or the route attribute includes any character other than [0-9][a-z][A-Z]. Note the default separator character (.) is in play. The source code appears to perform basic string comparisons to match the stickysession token value against the route, but are there character or length constraints to the route attribute?
I am using 2.4.29+ variants.
Thanks!
Rob
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RE: [users@httpd] stickysession and BalancerMember route
Posted by DICKEY Rob <Ro...@3ds.com>.
Thanks - I found that 64 limit in code, and did not look like any other character in the route string match would be problematic but for a route value like route=ab-8080-cde1 we are finding that stickiness is not consistent... the preamble to the route is another string like WebAppName.ab-8080-cde1 but in all cases the separator character is present...and the client is being sent and presenting the stickiness cookie as expected.
When we modify the route to be simple like route=a80801 the stickiness works as expected.
I'll keep debugging.
Thanks.
Rob
-----Original Message-----
From: Yann Ylavic <yl...@gmail.com>
Sent: Wednesday, February 17, 2021 9:21 AM
To: users@httpd.apache.org
Subject: Re: [users@httpd] stickysession and BalancerMember route
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On Tue, Feb 16, 2021 at 4:52 PM DICKEY Rob <Ro...@3ds.com> wrote:
>
> The source code appears to perform basic string comparisons to match the stickysession token value against the route, but are there character or length constraints to the route attribute?
The route is limited to 64 characters and must be preceded by a special character within the URL/cookie value (default character is '.', though stickysessionsep= might be used to change it). These are the only constraints I'm aware of..
But this means that the backend must set routed URLs/cookies of that form, otherwise some "automatic" routing can be performed like in https://httpd.apache.org/docs/2.4/en/mod/mod_proxy_balancer.html#example
(the one using mod_headers).
Regards;
Yann.
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Re: [users@httpd] stickysession and BalancerMember route
Posted by Yann Ylavic <yl...@gmail.com>.
On Tue, Feb 16, 2021 at 4:52 PM DICKEY Rob <Ro...@3ds.com> wrote:
>
> The source code appears to perform basic string comparisons to match the stickysession token value against the route, but are there character or length constraints to the route attribute?
The route is limited to 64 characters and must be preceded by a
special character within the URL/cookie value (default character is
'.', though stickysessionsep= might be used to change it). These are
the only constraints I'm aware of..
But this means that the backend must set routed URLs/cookies of that
form, otherwise some "automatic" routing can be performed like in
https://httpd.apache.org/docs/2.4/en/mod/mod_proxy_balancer.html#example
(the one using mod_headers).
Regards;
Yann.
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[users@httpd] RE: stickysession and BalancerMember route
Posted by DICKEY Rob <Ro...@3ds.com>.
Ignore the default separator character comment (related to jvmRoute in TomEE connectors...)
Best Regards,
Rob DICKEY
Americas R&D Technical Customer Support Senior Manager
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-----Original Message-----
From: DICKEY Rob <Ro...@3ds.com>
Sent: Tuesday, February 16, 2021 7:52 AM
To: users@httpd.apache.org
Subject: [users@httpd] stickysession and BalancerMember route
EXTERNAL EMAIL : The sender of this email is external to 3DS. Be wary of the content and do not open unexpected attachments or links. If you consider this email as spam, you can click the following link https://spam-report.3ds.com/?linktext=https://www.mailcontrol.com/sr/ialEqMkhAmLGX2PQPOmvUtzroFmuoUEuPQhadcgl_RLXvtIKmWR8wBQF35zYCRzmUq8M6f4RkrQAXoNDtAu6BA== (no login or additional action will be requested).
I am observing problems with mod_proxy_balancer's sticky session handling when either the length of the route attribute of the BalancerMember is > x length, or the route attribute includes any character other than [0-9][a-z][A-Z]. Note the default separator character (.) is in play. The source code appears to perform basic string comparisons to match the stickysession token value against the route, but are there character or length constraints to the route attribute?
I am using 2.4.29+ variants.
Thanks!
Rob
This email and any attachments are intended solely for the use of the individual or entity to whom it is addressed and may be confidential and/or privileged.
If you are not one of the named recipients or have received this email in error,
(i) you should not read, disclose, or copy it,
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Please be informed that your personal data are processed according to our data privacy policy as described on our website. Should you have any questions related to personal data protection, please contact 3DS Data Protection Officer at 3DS.compliance-privacy@3ds.com<ma...@3ds.com>
For other languages, go to https://www.3ds.com/terms/email-disclaimer
This email and any attachments are intended solely for the use of the individual or entity to whom it is addressed and may be confidential and/or privileged.
If you are not one of the named recipients or have received this email in error,
(i) you should not read, disclose, or copy it,
(ii) please notify sender of your receipt by reply email and delete this email and all attachments,
(iii) Dassault Systèmes does not accept or assume any liability or responsibility for any use of or reliance on this email.
Please be informed that your personal data are processed according to our data privacy policy as described on our website. Should you have any questions related to personal data protection, please contact 3DS Data Protection Officer at 3DS.compliance-privacy@3ds.com<ma...@3ds.com>
For other languages, go to https://www.3ds.com/terms/email-disclaimer