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(ITS#7008) paged results against ldap-proxy errors with 'cookie is invalid'

Full_Name: Bill MacAllister
Version: 2.4.26
OS: Debian 6
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (

We typically setup local proxy servers to support applications that cannot 
support a GSSAPI bind to the directory server.  The proxy server allows 
anonymous access to the directory for connections from the localhost and 
connects to the master using GSSAPI.  We are experiencing a failures when 
we attempt to use the paged results control on the proxy.  For example:

ldapsearch -E pr=1000/noprompt -x -b "cn=people,dc=stanford,dc=edu" -h localhost
 "(&(objectClass=suPerson)(suVisibIdentity=world))" ou telephonenumber title

ends with the error:

# search result
search: 5
result: 0 Success
control: 1.2.840.113556.1.4.319 false MA0CAQAECCiDAAAAAAAA
pagedresults: cookie=KIMAAAAAAAA=
# extended LDIF
# LDAPv3
# base <cn=people,dc=stanford,dc=edu> with scope subtree
# filter: (&(objectClass=suPerson)(suVisibIdentity=world))
# requesting: ou telephonenumber title 
# with pagedResults control: size=1000

# search result
search: 6
result: 2 Protocol error
text: paged results cookie is invalid

# numResponses: 4005
# numEntries: 4000

This result is not consistent.  We have seen examples where 2000 and 3000
entries being returned and then the error.  Another test that we performed with
a slightly more complex filter, i.e.  


returned usually returned 1000 entries before erroring.

Issuing a similar search directly against the backend ldap server completes

We have seen the same behavior on OpenLDAP 2.4.23 as well.

Logs generated running slapd standalone with '-d stats,packets' are available at