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 tuning.
> From: markwu > Sent: Thursday, January 31, 2008 2:57 PM > To: '[email protected]' > 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. > > _____________________________________________ > From: markwu > Sent: Wednesday, January 30, 2008 2:42 PM > To: '[email protected]' > Subject: Random UID not found problem > > Hi, > 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)[9225]: could not identify user (from > getpwnam(USERNAME)) > crond[9225]: 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. > > Thanks >
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