Lately I was having an issue with a Lion Server that refused logins of users stored in OpenDirectory. A quick check of
/var/log/opendirectoryd.log revealed an issue with the «Password Server»:
Module: AppleODClient - unable to send command to Password Server - sendmsg() on socket fd 16 failed: Broken pipe (5205)
As this message apparently doesn’t appear on Google yet, there’s my contribution to solving this.
The fix was to kill -9 the kerberos authentication daemon:
sudo killall kpasswdd
which in fact didn’t help (sometimes even sudo isn’t enough), so I had to be more persuasive to get rid of the apparently badly hanging process:
sudo killall -9 kpasswdd
This time the process was really killed and subsequently instantly restarted by launchd.
After that, the problem went away.