ldapmodify command line tool results in 'deferring operation: too many executing'

[Sean Burford <unix.gurus@gmail.com>]

Hi,

During a recent ldapmodify of 1000 records, I got some "deferring operation: too many executing" messages from OpenLDAP slapd 2.3.39.

I am surprised by this, since I thought that since ldapmodify waited for the result of each operation nothing would be queued.

Could this be caused by there being too many operations in progress across the entire server?

This was the ldapmodify command line:
ldapmodify -v -H "ldaps://master.example.com" -x -W -D "uid=person,ou=people,dc=example,dc=com" -c -f file.ldif

The ldif only contained OpenLDAPaci attribute deletes that fit this template:
dn: cn=host1000.example.com,ou=servers,dc=example,dc=com
changetype: modify
delete: OpenLDAPaci

The ldapmodify output looked normal:
delete OpenLDAPaci:
modifying entry "cn=host1000.example.com,ou=servers,dc=example,dc=com"
modify complete

delete OpenLDAPaci:
modifying entry "cn=host1001.example.com,ou=servers,dc=example,dc=com"
modify complete

But the logs show the 'deferring operation: too many executing':
Feb 24 08:27:54 server slapd[9433]: conn=19226 op=640 MOD dn="cn=host1000.example.com,ou=servers,dc=example,dc=com"
Feb 24 08:27:54 server slapd[9433]: conn=19226 op=640 MOD attr=OpenLDAPaci
Feb 24 08:27:54 server slapd[9433]: conn=19226 op=640 RESULT tag=103 err=0 text=
Feb 24 08:27:54 server slapd[9433]: connection_input: conn=19226 deferring operation: too many executing
Feb 24 08:27:54 server slapd[9433]: conn=19226 op=641 MOD dn="cn=host1001.example.com,ou=servers,dc=example,dc=com"
Feb 24 08:27:54 server slapd[9433]: conn=19226 op=641 MOD attr=OpenLDAPaci
Feb 24 08:27:54 server slapd[9433]: conn=19226 op=641 RESULT tag=103 err=0 text=

-- 
Thanks,
Sean Burford