We have found the problem is the overloading the master server, once we
switch client to use a consumer server as primary ldap server, all
problems are gone.
The Master has 16G RAM, two quad-core 3G CPU and it is binding to 400
client machines with 7000 TCP connections. I will try some performance
Sent: Thursday, January 31, 2008 2:57 PM
Subject: RE: Random UID not found problem
We just found that all cron jobs at 0,10,20,30,50 every hour would
fail consistently and give the error in my original post, but any
other minutes all cron jobs are OK.
We are using nss_ldap_226-18 and crontabs-1.10-7. I will check if UID
not found problem occurs also at 10th minutes.
Sent: Wednesday, January 30, 2008 2:42 PM
Subject: Random UID not found problem
Some of our users get "UID xxxx not found" message when they open a
new terminal or run a rsh command, it appears a few times a day and
it is mostly just annoying message because users can continue to work
as normal, however, sometimes It also causes cron jobs to fail,
In system log, it shows,
crond(pam_unix): could not identify user (from
crond: User not known to the underlying authentication module
We are using Fedora DS 1.0.4, and clients are RHEL 4.5 . This problem
started ever since we switched into LDAP three months ago.