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slurpd lockups, serialization of updates (ITS#3123)

Full_Name: Quanah Gibson-Mount
Version: 2.2.11
OS: Solaris 8
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (

I'm noticing routine lockups of slurpd in 2.2.11, where it pushes changes to a
single replica (3 are listed), and then refuses to update the remaining 2

In today's case, I then issued a kill command to slurpd, at which point it then
started updating the 2nd replica, and then stopped updating.  After that, I did
a kill -9 to slurpd, fully killing it off, and restarted slurpd.  At that point,
it finished updating the 3rd replica.

What is interesting is that slapd/slurpd processed over 5000 changes to my
replica's last night without issue.  Today, a series of updates to the servers
resulted in this scenario.  This is the 3rd time I've seen this happen.

I will be compiling a debugging symbols version of slurpd and deploying it,
hopefully I can get this to happen again soon and provide more information.

Our 2.2.6 version of slurpd does not appear to have this problem.