Hi,

In our 1 Master - several slaves environment master slapd sometimes stucks in such condition that it takes minutes to get replay to simple queries with no visible resource consumption on both: the slapd process itself and the linux it is running on.

Restarting slapd helps for several days. Today I have not been able to restart it without kill -9 because of:

slapd shutdown: waiting for 12 operations/tasks to finish

Waited 5 minutes with no luck, kill -9, start.

slapd: 2.4.28 OS: Ubuntu 12.04.2 LTS

I'm Ok with "try latest version", but it would be nice to have some pointers (maybe bug in this version or error in configuration).

The server is running for 6+ month with no problems. The stucks first appeared 2 weeks ago after changing ACLs to use group.exact instead of set which came deadly slow.