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From Daniel Mikusa <>
Subject RE: Login fails, then works subsequently (Tomcat 7)
Date Wed, 21 Dec 2011 22:37:57 GMT

>The http trace would show if the id/pw were different.  But that would 
>pretty much imply that the browser is messing up what it sends.  I guess
>that's always a possibility.  

Not necessarily, the browser will send things other than the login and 
password like headers and cookies.

>But I haven't changed browsers in months.
>And it's sending a saved id/pw in all cases.  the login form appears, and
>the id/pw is already filled in.  

You could be right, but garbage in equals garbage out so it's worth verifying.
Especially when it's pretty painless to do.  If you're using Firefox there are
plugins that can help like TamperData and Live HTTP Headers.


On Wed, Dec 21, 2011 at 4:01 PM, Chema <> wrote:

> You can try to set traces into the code of your realm class, if it's a
> custom realm : to watch the query executed ,  to watch the
> user/password passed from browser, to catch exceptions and print stack
> trace ...
> If you dont have a custom realm, you can try to create one for testing
> Can you paste your server.xml conf ? Only realm parts (all), without
> sensible data
> Good luck
> 2011/12/21 Jerry Malcolm <>:
> > About a month ago, I upgraded two different servers from TC 5 to TC 7.
>  The
> > migration went cleanly, and everything has been working fine with the
> > exception of one thing.   About 50% of the time, when I log in to the
> realm
> > for my web app (form-based login), the login will fail.  When I try again
> > with the same id/pw it works.  I can then log out and log back in
> > repeatedly with no problem.  But if I come back later and try to log on
> > again, same things.  Fails once, and then passes.
> >
> > My authentication configuration hasn't changed for years on these
> webapps,
> > and this has worked solid on TC 5.  My database (MySQL) hasn't changed,
> and
> > the user tables are unchanged.  The only thing that has changed is TC 5-
> > -->TC 7.  And the problem has hit both servers, completely independent of
> > each other, other than they both got the TC 7 upgrade.
> >
> > First of all, has anyone ever heard of this situation?  Second, any idea
> > how where/how to turn on detailed tracing/logging of the authentication
> > calls to see what might be going on in the authentication code in TC?
>  The
> > only information I'm getting is that the id/pw were not correct.  But
> > again, same id/pw becomes correct when I submit it a 2nd time.
> >
> > The one thing I didn't change was the MySQL connector.  Should that have
> > been changed for TC 7? (Just guessing now)
> >
> > Suggestions for how to proceed?
> >
> > Thx.
> >
> > Jerry
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