KrbException : Request is a replay

[suma]

Hi All,

I am unable to successfully authenticate user in concurrent threads
from the same client.  One of the thread would fail with error; while
other requests are successful.
=========================
KrbException: request is a replay
=========================

Is KDC thinking that it is a replay attack and discarding one of my
authentication request?

I am using kerberos login module from JAAS for authentication.

Appreciate your time,

Thanks in advance,
--Suma