[Building Sakai] Unexpected login prompts - Sakai 2.6.0

[Sam Chow]

Dear Sir,

I have a similar problem. I am using  Pound to loadbalance the traffic to 2
sakai web server, what should i config to keep the user session? Thanks.

Best Regards,
Sam Chow



Dave Ross wrote:
> 
> Once you log in the second time, you'll have a valid session on both
> Sakai servers and the problem will be "masked".
> 
> I would review your CSS config. Cookie-based persistence is the
> de-facto standard around here - SSL Session based persistence should
> work but I can't say it's as tried and true as cookie-based.
> 
> On Tue, Jun 15, 2010 at 4:03 PM, Grossman,John E
> <john.grossman at mdanderson.org> wrote:
>>
>> We are running a CSS load balancer with two Sakai instances. The Sakai
>> instances are not cluster aware.
>> The CSS is configured for SSL sticky sessions as we use SSL for all
>> traffic to Sakai. This is based on the SSL Session ID (not the Sakai
>> session ID).
>>
>> We did suspect the load balancer, but the odd thing is that when you get
>> this unexpected prompt to authenticate, you can generally re-enter your
>> Sakai session with no problems. If the load balancer were sending you to
>> the wrong server, it seems like you wouldn't be able to re-enter the
>> Sakai session because the session would only exist on the original
>> server. Am I misunderstanding Sakai sessions?
>>
>> John
>>
>> -----Original Message-----
>> From: sakai-dev-bounces at collab.sakaiproject.org
>> [mailto:sakai-dev-bounces at collab.sakaiproject.org] On Behalf Of Zach A.
>> Thomas
>> Sent: Monday, June 14, 2010 5:16 PM
>> To: sakai-dev at collab.sakaiproject.org
>> Subject: Re: [Building Sakai] Unexpected login prompts - Sakai 2.6.0
>>
>> This is consistent with a cluster environment where the load balancer
>> does not properly "stick" the user to a single server. Thus, they're
>> logged in on one of the nodes, but the next request goes to some other
>> server where they're _not_ logged in.
>>
>> Can you confirm whether you are running a cluster of app servers? And if
>> so, how are you performing load balancing?
>>
>> cheers,
>> Zach Thomas
>> Owner, Aeroplane Software LLC
>>
>> On Sat, 2010-06-12 at 17:10 -0500, Grossman,John E wrote:
>>> We periodically have a problem where a user is in the system working
>>> (constant activity – not a timeout issue) and Sakai unexpectedly
>>> prompts for user name and password. A variation on this is that Sakai
>>> will prompt several times. The correct credentials are entered several
>>> times and then the mangled screen shown shown below appears. The log
>>> shows this:
>>
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-----
Best Regards,

Sam Chow
Research Assistant
Lingnan Unviersity
Hong Kong
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