High CPU usage with syncrepl on 2.26

[Ben Beuchler <insyte@gmail.com>]

I'm using OpenLDAP 2.26 on Ubuntu linux.   Replication appears to be
working in that when I first fired up the secondary server it pulled
across the full database and if I modify an entry on the primary
server, the modification is properly sync'd to the secondary. 
However, if I add a new entry to the primary, the CPU load on the
primary immediately jumps to 100% and stops responding.  As this is a
production server, I haven't been able to wait to see how long this
state lasts.  If I shut down the secondary server and add the new
entry to the primary, it is sync'd as soon as I start the secondary
back up.

This is the syncrepl section from the secondary config:

syncrepl rid=42
        provider=ldaps://ldap.mcad.edu
        type=refreshAndPersist
        searchbase="dc=ldap,dc=mcad,dc=edu"
        filter="(objectclass=*)"
        scope=sub
        updatedn="cn=replicant,dc=bindaccts,dc=ldap,dc=mcad,dc=edu"
        bindmethod=simple
        binddn="cn=syncclient,dc=bindaccts,dc=ldap,dc=mcad,dc=edu"
        credentials=<snip>

And the sessionlog entry from the primary server:

sessionlog 1 100

Any thoughts on why this might be happening?

Thanks!

-Ben