Hello, I run into this same issue. However the segfault only happens if the dds overlay is defined before the syncprov overlay in slapd.conf. Br, Petteri Stenius -----Original Message----- From: openldap-bugs-bounces(a)OpenLDAP.org [mailto:openldap-bugs-bounces@OpenLDAP.org] On Behalf Of dieter(a)dkluenter.de Sent: 30. marraskuuta 2011 12:12 To: openldap-its(a)openldap.org Subject: (ITS#7102) slapd segfaults on slapo-dds refresh with syncprov enabled Full_Name: Dieter Kluenter Version: OS: URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (141.38.5.243) slapd crashes with segmentation fault on a slapo-dds refresh operation, if syncprov is enabled and configured (gdb) bt #0 0x00000000004dd429 in slap_get_commit_csn (op=0x7f01d8013530, maxcsn=0x7f01e6a346d0, foundit=0x7f01e6a346cc) at ctxcsn.c:59 #1 0x00007f01f0d0a401 in syncprov_op_response (op=0x7f01d8013530, rs=0x7f01e6a34a30) at syncprov.c:1793 #2 0x000000000045cbff in slap_response_play (op=0x7f01d8013530, rs=0x7f01e6a34a30) at result.c:505 #3 0x000000000045ce24 in send_ldap_response (op=0x7f01d8013530, rs=0x7f01e6a34a30) at result.c:580 #4 0x000000000045e292 in slap_send_ldap_extended (op=0x7f01d8013530, rs=0x7f01e6a34a30) at result.c:915 #5 0x000000000048aedb in fe_extended (op=0x7f01d8013530, rs=0x7f01e6a34a30) at extended.c:237 #6 0x000000000048ab57 in do_extended (op=0x7f01d8013530, rs=0x7f01e6a34a30) at extended.c:177 #7 0x0000000000446a15 in connection_operation (ctx=0x7f01e6a34b60, arg_v=0x7f01d8013530) at connection.c:1138 #8 0x0000000000446fb3 in connection_read_thread (ctx=0x7f01e6a34b60, argv=0x10) at connection.c:1274 #9 0x00007f01f5929fc0 in ldap_int_thread_pool_wrapper (xpool=0x91d540) at tpool.c:685 #10 0x00007f01f48f0a3f in start_thread (arg=0x7f01e6a35700) at pthread_create.c:297 #11 0x00007f01f3c1166d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 #12 0x0000000000000000 in ?? () (gdb) frame 0 #0 0x00000000004dd429 in slap_get_commit_csn (op=0x7f01d8013530, maxcsn=0x7f01e6a346d0, foundit=0x7f01e6a346cc) at ctxcsn.c:59 59 LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) { (gdb) frame 1 #1 0x00007f01f0d0a401 in syncprov_op_response (op=0x7f01d8013530, rs=0x7f01e6a34a30) at syncprov.c:1793 1793 slap_get_commit_csn( op, &maxcsn, &foundit ); (gdb) frame 2 #2 0x000000000045cbff in slap_response_play (op=0x7f01d8013530, rs=0x7f01e6a34a30) at result.c:505 505 rc = op->o_callback->sc_response( op, rs ); (gdb) frame 3 #3 0x000000000045ce24 in send_ldap_response (op=0x7f01d8013530, rs=0x7f01e6a34a30) at result.c:580 580 rc = slap_response_play( op, rs ); (gdb) -Dieter