Hello, Mark.

Up until recently, this had been working great. We are now experiencing hangs whenever we try to update the records with one particular group. I think the hangs are occur when we try to feed too much data to ldapmodify at a time. For instance, if I have the above group and try to apply the following ldif file:

Large collections of values can be slow for some uses; have you looked at the sortvals option? (needs a db reload with slapcat+slapadd)

memberUid: t2479

That doesn't seem terribly large, no. sortvals is more pertinent if you have 100k+ values on the attribute...

The update simply hangs. Tossing a "-d 65535" shows that the process is sitting in loop spitting out messages similar to:

ldap_int_select

This looks like you added -d to your ldapmodify. More useful here would be server logs; try running slapd with -d 263 so we can see more of what the server is trying. (1+2+4+256)

I'm happy to provide any additional details or debugging information, just let me know what you need.

Can you attach a gdb backtrace taken during the hang? (thread apply all backtrace full)

Matthew Backes Symas Corporation mbackes@symas.com