masarati@aero.polimi.it wrote:

No. Some overlay along the lines apparently mucks with e_private in the entry that back-ldap is sending. It's probably slapo-pcache. I need to debug this. You say it happens seldom. Can you recognize anything special in the operation that triggers the assertion failure? I mean: either in terms of special data, or in terms of special state of the cache? This could help narrow down some means to reproduce the issue.

Thanks, p.

What is interesting is that most of the logs are something like this one:

conn=6891 op=1 SRCH attr=spamassassin query template of incoming query = (&(objectClass=)(cn=)) Entering QC, querystr = (&(objectClass=mailUser)(cn=nobody)) Lock QC index = 0x7e0a7b8 QUERY ANSWERABLE (answered 3267 times) conn=6891 op=1 SEARCH RESULT tag=101 err=0 nentries=0 text= conn=6891 fd=32 closed (connection lost) query template of incoming query = (&(objectClass=)(uid=)) QUERY NOT ANSWERABLE QUERY NOT CACHEABLE query template of incoming query = (&(objectClass=)(uid=)) QUERY NOT ANSWERABLE QUERY NOT CACHEABLE query template of incoming query = (&(objectClass=)(uid=)) QUERY NOT ANSWERABLE QUERY NOT CACHEABLE query template of incoming query = (&(objectClass=)(uid=)) QUERY NOT ANSWERABLE QUERY NOT CACHEABLE query template of incoming query = (&(objectClass=)(uid=)) QUERY NOT ANSWERABLE QUERY NOT CACHEABLE conn=3573 op=812 SRCH base="dc=ciela.net,dc=hosting,dc=spnet,dc=net" scope=1 deref=0 filter="(&(objectClass=mailUser)(uid=diana))" conn=3573 op=812 SRCH attr=uid userPassword mailMessageStore uidNumber gidNumber query template of incoming query = (&(objectClass=)(uid=)) Entering QC, querystr = (&(objectClass=mailUser)(uid=diana)) Lock QC index = 0x7ee9fe8 Base of added query = dc=ciela.net,dc=hosting,dc=spnet,dc=net QUERY ANSWERABLE (answered 63 times) conn=3573 op=812 SEARCH RESULT tag=101 err=0 nentries=1 text= slapd: /home/luben/openldap-2.4.18-h/servers/slapd/entry.c:483: entry_clean: Assertion `e->e_private == ((void *)0)' failed.

This sequence of : query template of incoming query = (&(objectClass=)(uid=)) QUERY NOT ANSWERABLE QUERY NOT CACHEABLE

is something I could not explain. There is not a log entry for incomming search. I have restarted the cache with more logging (stats+trace+pcache) to see from where they come.

I have some core dumps and if you tell me for what to look for, tomorrow I will debug them and see if there is a common pattern.

Luben