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From Ethan Jewett <>
Subject Re: [Lift] JSON handler doesn't respond
Date Tue, 01 Sep 2009 12:31:10 GMT
Sounds like this might be a browser bug (or perhaps "working as designed" in
SAP parlance). Unless I'm mistaken, the user is identified by a session
cookie. Cookies are stored in some manner by the browser, usually with the
domain as the key. It sounds like at least in Firefox, the cookie for 2 of
the 3 user sessions is being replaced at some point by the cookie of the 3rd
user session, resulting in an inability to post or read messages with the
users who are now using the wrong session cookie.
Chrome has a more sandboxed model than Firefox, so it probably keeps the
cookies for a given window or tab local to that window until the window is
closed. Interesting question for Chrome: Open three windows with three
different users. Close each window. Open ESME again in Chrome. Which user is
logged in? I'd bet it's the user that was logged into the last of the three
windows that was closed.
If this is what is happening, then I doubt that there is much that can be
done on the Lift side of the house.


On Tue, Sep 1, 2009 at 1:42 AM, Anne Kathrine Petter√łe <>wrote:

> I only use Firefox as a browser, and have had this error several times.
> So maybe it is the browser making a difference?
> /Anne
> On 01 Sep, 2009, at 06:51 , Vassil Dichev wrote:
>  I built Lift locally and put dumps in LiftSession's cleanupUnseenFuncs
>> and updateFuncByOwner. So far I cannot reproduce the problem.
>>    <snapshot>
>>>>     <buildNumber>1724</buildNumber>
>>>>   </snapshot>
>>>>   <lastUpdated>20090828152733</lastUpdated>
>>>> Do I have the correct updated jar?
>>> I have no idea.
>> Since you've mentioned in the past that you're using hudson for
>> building the lift jars before they're uploaded to the public maven
>> repo, I was hoping that one can associate the build number or date
>> with the specific commit.
>>  Can you specify the exact steps to reproduce the problem?  I have really,
>>> really tried to make it happen and can't. :-(
>> I'm using Firefox, on different versions of Linux. I have three users
>> (e.g. a follows b, b follows c) and I open up the ESME main page in a
>> separate browser for each user. I post a message for each to make sure
>> it works. I leave the browsers open and after a while I check again
>> whether I can send a message with all users. Usually half an hour is
>> enough for 2-3 of the users to block. The problem can always be
>> reproduced on the Stax instance, too, by just leaving a session open-
>> Dick can confirm that it regularly happens to him, too. Maybe he can
>> add some details on how he reproduces it.
>> Let's see if the fix works this time. If not, the only difference I
>> can think of is the browser- you could be using Chrome or Safari. I've
>> tried reproducing with Chrome in the past once or twice and couldn't.
>> Vassil

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