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Re: LDAP searches hang after returning results...

Jeff Lebo wrote:

I was able to get 2.4.40 compiled and installed.  Having the same issue.. here
is the syslog output... you can see the timestamp difference between where the
hang happens, and where slapd finally disconnects.


Use slapd -d7, not syslog.
The null search references look suspicious, most likely AD is returning malformed references and back-ldap is hitting a DNS timeout trying to resolve them. 


Oct 21 20:51:24 LDAP02 slapd[28955]: => send_search_entry: conn 1001
dn="cn=TEST,ou=Support,ou=Users,ou=Staff,dc=domain,dc=com"
Oct 21 20:51:24 LDAP02 slapd[28955]: <= send_search_entry: conn 1001 exit.
Oct 21 20:51:24 LDAP02 slapd[28955]: => send_search_reference: dn="(null)"
Oct 21 20:51:24 LDAP02 slapd[28955]: <= send_search_reference
Oct 21 20:51:25 LDAP02 slapd[28955]: => send_search_reference: dn="(null)"
Oct 21 20:51:25 LDAP02 slapd[28955]: <= send_search_reference
Oct 21 20:53:32 LDAP02 slapd[28955]: => send_search_reference: dn="(null)"
Oct 21 20:53:32 LDAP02 slapd[28955]: <= send_search_reference
Oct 21 20:53:32 LDAP02 slapd[28955]: send_ldap_result: conn=1001 op=1 p=3
Oct 21 20:53:32 LDAP02 slapd[28955]: send_ldap_response: msgid=2 tag=101 err=0
Oct 21 20:53:32 LDAP02 slapd[28955]: connection_get(12): got connid=1001
Oct 21 20:53:32 LDAP02 slapd[28955]: connection_read(12): checking for input
on id=1001
Oct 21 20:53:32 LDAP02 slapd[28955]: op tag 0x42, time 1413950012
Oct 21 20:53:32 LDAP02 slapd[28955]: ber_get_next on fd 12 failed errno=0
(Success)
Oct 21 20:53:32 LDAP02 slapd[28955]: conn=1001 op=2 do_unbind
Oct 21 20:53:32 LDAP02 slapd[28955]: connection_close: conn=1001 sd=12
Oct 21 20:53:32 LDAP02 slapd[28955]: =>ldap_back_conn_destroy: fetching conn 1001
Oct 21 20:53:32 LDAP02 slapd[28955]: =>ldap_back_conn_destroy: destroying conn
1001 refcnt=0 flags=0x00000101

Any ideas?

------------------------------------------------------------------------------
From: jeflebo@outlook.com
To: quanah@zimbra.com; openldap-technical@openldap.org
Subject: RE: LDAP searches hang after returning results...
Date: Tue, 21 Oct 2014 19:39:45 -0700

Unfortunately just dealing with what was handed to me.  I'll try and get a new
version compiled and see if that resolves this issue.

 > Date: Tue, 21 Oct 2014 18:21:56 -0700
 > From: quanah@zimbra.com
 > To: jeflebo@outlook.com; openldap-technical@openldap.org
 > Subject: RE: LDAP searches hang after returning results...
 >
 > --On Tuesday, October 21, 2014 6:27 PM -0700 Jeff Lebo
 > <jeflebo@outlook.com> wrote:
 >
 > >
 > > 2.4.31
 >
 > Why are you wasting everyone's time, but most importantly your own time,
 > using something so ancient?
 >
 > <http://www.openldap.org/software/release/changes.html>
 >
 > Install a current release (2.4.40), and then see what issues you hit.




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  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/