Full_Name: Rajalakshmi Version: 2.4.44 OS: RHEL 7.6 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (116.197.184.12)

(1) What problem/issue/behavior are you having trouble with? What do you expect to see? Using OpenLDAP version 2.4.44 we are not seeing Concurrency whereas in OpenLDAP Version 2.4.23 we are seeing Concurrent LDAP Requests. In our product OpenLDAP 2.4.23 was previously used and the concurrent request for search using the API ' ldap_search_ext_s() ' was working as expected and our product scalability was better. We have recently upgraded LDAP to OpenLDAP 2.4.44. But with this version, the api 'ldap_search_ext_s()' does not seem to work as expected, i.e concurrent requests handling is not happening.

(2) Where are you experiencing the behavior? What environment? In RHEL 7.6. If we sent 10 Concurrent Requests each request is processed one by one. Most of the threads are waiting in ldap_search_req.

(3) When does the behavior occur? Frequently? Repeatedly? At certain times? Repeatedly.

(4) What information can you provide around timeframes and the business impact?

There is a release impact due to the open issue. Hence seeking a reply at the earliest.

In our product, the API ‘ldap_search_req ‘ is used and this will be called by multiple threads at a time. On the process startup of the application, bind to ldap Server is created. status = ldap_search_ext_s(m_ld, pszBase, nScope, pszFilter, ppszAttrs2, nAttrsOnly, NULL, NULL, pTimeout2, LDAP_NO_LIMIT, ppResult);

(5) Whether we need to do anything on that? Request for a solution at the earliest, is there any alternative api to support concurrency request Is there any open defect in the 'OpenLDAP 2.4.44' related to the synchronous handling method ' ldap_search_ext_s() '.