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Re: (ITS#7008) paged results against ldap-proxy errors with 'cookie is invalid'
- To: openldap-its@OpenLDAP.org
- Subject: Re: (ITS#7008) paged results against ldap-proxy errors with 'cookie is invalid'
- From: email@example.com
- Date: Tue, 2 Aug 2011 17:54:26 GMT
- Auto-submitted: auto-generated (OpenLDAP-ITS)
--On Tuesday, August 02, 2011 10:08:32 AM -0700 Bill MacAllister <firstname.lastname@example.org> wrote:
> --On Monday, August 01, 2011 02:46:50 PM -0700 Howard Chu <email@example.com> wrote:
>> firstname.lastname@example.org wrote:
>>> Full_Name: Bill MacAllister
>>> Version: 2.4.26
>>> OS: Debian 6
>>> URL: ftp://ftp.openldap.org/incoming/
>>> Submission from: (NULL) (126.96.36.199)
>>> 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: 1.2.840.1135188.8.131.529 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
>> Your log shows that the subsequent search request initiates a new
>> Bind to the remote server, which implies that it's not re-using the
>> same connection as the first request. Since a paged results cookie
>> is only valid within the context of a single connection, you get
>> this error result.
> Not sure which log you are looking at. When I look at the log:
> The only connection I see in the log is conn=1000 and it ends with:
> conn=1000 op=5 SEARCH RESULT tag=101 err=2 nentries=0 text=paged results cookie is invalid
> ldap_read: want=8, got=7
> 0000: 30 05 02 01 07 42 00 0....B.
> ldap_read: want=8, got=0
> conn=1000 op=6 UNBIND
> conn=1000 fd=11 closed
> These tests where made with a single ldapsearch request. The ldapsearch
> tests fail when using the proxy and succeed when connecting directly to
> the LDAP server with the database on it.
> A side node: the test case I submitted used ldapsearch, but the
> problem was uncovered using a python application that is used for
> syncing Gmail account data.
I have copied the backend server configuration to
http://www.stanford.edu/~whm/files/ldap-debugging/. I dumped an
copy of cn=config and there is a files based version the in ldap
subdirectory as well.
Infrastructure Delivery Group, Stanford University