slave slapd crashing on MOD operation

[Allan Streib <astreib@indiana.edu>]

Both master and slave running OpenLDAP 2.0.27/ldbm.

A change is trying to be replicated to the slave, and the slave crashes.
Slave log shows:

May 19 14:53:54 xxxxxx slapd[2409]: conn=3 op=4 MOD dn="iuEduUPID=f5e016cc9bdb465620b8975f215b0c07,ou=people,dc=iu,dc=edu"
May 19 14:53:54 xxxxxx slapd[2409]: idl_insert_key: idl_fetch_one returned NULL

That is the last log entry.

The dbb files were recently rebuilt (< 3 days ago) using slapadd from a
slapcat dump due to suspected indexing problems.  Since this operation
succeeded on the master, why did it fail on the slave?

I can query the slave entry without error, and slapd restarts without
error.  But if I then restart slurpd the slave immediately crashes again
on the same operation.  Suggestions?

Allan