yaroslavr@digdes.com wrote:

Full_Name: Yaroslav Rutsky Version: 2.4.40 OS: CentOS release 6.6 (Final) URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (85.114.5.9)

We used customized OpenLDAP RPM-packets, builded from openldap-2.4.40-6.el6_7.src.rpm, from CentOS repository with patch to support Outlook addressbook browsing feature (in conjunction with sssvlv overlay):

What is the root cause of this error ("double free or corruption" at malloc.c)? What direction we should dig to troubleshoot this error? Should we monitor memory leaks or try to use tcmalloc instead of malloc?

Since it appears that you can reproduce this problem, it ought to be easy to identify the cause using valgrind.

Meanwhile, 2.4.40 is 3 releases behind and we're about to release 2.4.44. If you can reproduce the problem in the current RE24 release candidate and track it down in valgrind there may be time to fix it for the 2.4.44 release. Otherwise, you'll have to wait for the next release.