Fwd: email authentication problems on production servers

Hi ALL


Users are reporting repeated user/pass requests resulting in failures
when they try to access their emails using a verity of mail clients.
Eventualy they will be able to login but it takes few minutes for them
to do so.


The setup is as follows:

Box A :RH9:   Perdition + POSTFIX + replicated LDAP
openldap-2.0.27-8
perdition-0.1.10-1

Box B: RH9: Perdition + Cyrus-imaps
db4-4.0.14-20
cyrus-imapd-2.1.15-1

There are about 600 users on box B. ANd both server have been in
operation for about a year.

When client experiences the repeated requests for authentication, the
logs on box A  show entries like :

Box A logs:

Jun  7 00:34:25 mx1 perdition[1018]: Auth: 1.2.3.4->1.2.2.3
user="user_client_dom" server="im01.domain.net" port="1110"
status="failed: authentication of client with real-server"


Further searching on box B shows things like:

Box B logs:

I noticed

Jun  8 03:28:41 im01 lmtpd[8922]: DBERROR db4: 9 lockers
Jun  8 03:28:42 im01 lmtpd[8931]: DBERROR db4: 9 lockers
Jun  8 03:28:42 im01 lmtpd[8907]: DBERROR db4: 8 lockers
Jun  8 03:28:43 im01 lmtpd[8937]: DBERROR db4: 7 lockers

and immediately aafterwards I started seeing entries like :

Jun  8 03:53:09 im01 saslauthd[13555]: pam_ldap: error trying to bind
as user "uid=user_client_dom, ou=users, ispmanDomain=client.dom,
o=ispman" (Invalid credentials)
Jun  8 03:53:09 im01 saslauthd[13555]: AUTHFAIL: user=user_client_dom
service=pop realm= [PAM auth error]
Jun  8 03:53:09 im01 pop3d[9556]: badlogin: mx1.domain.net[1.2.3.4]
plaintext user_client_dom  SASL(-13): authentication failure:
checkpass failed

I suspect a DB4 cause.


Now I have few questions:

- Has anyone experienced similar issues ?

- would an upgrade to DB4 work with the existing DBs of saslauthd and company ?


Any ideas or suggestions ?



Serving


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