First login being too slow

Hello,

I am having a big problem configuring login with CAS and defining new directories of my own for users and groups.

Everything works fine, in the sense I don't get any error in any moment. But the problem is that when a user make first login (of the day for example), this login is taking too much time (over 6 minutes). This is happening for all users except for Administrator user, and, as I have said, only in their first login.

I don't know if it does matter, but we are using Oracle Dialect for user and groups directories.

Has anyone any idea of what could be happening?

Thanks in advance

Kind Regards

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ANSWER

To investigate what happens during slow periods like that, please use jstack (a standard java command-line tool) to capture a full stack trace of the server. Do a few of them at 10 seconds interval, and try to extract the relevant stack trace.
09/20/2013