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In some cases when SASL is used, openldap might try to canonicalize the hostname by doing a reverse lookup. This might be a blocking call because openldap uses glibc's getnameinfo (The openldap function is ldap_pvt_get_hname).
It is possible to turn off this check by setting LDAP_OPT_X_SASL_NOCANON.
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cc: => myllynen@redhat.com
It is not only a problem about blocking on DNS calls. It may also cause failures to get a ticket because the PTR is wrong. Bad DNs configuration for reverse addresses is very common, especially in test environments, and small networks.
rhbz: => 732935
component: SSSD => LDAP Provider milestone: NEEDS_TRIAGE => SSSD 1.5.13
owner: somebody => jhrozek
Fixed by: - a2e6bd6 (master) - ad54c09 (sssd-1-6) - 4fe4e06 (sssd-1-5)
resolution: => fixed status: new => closed
rhbz: 732935 => [https://bugzilla.redhat.com/show_bug.cgi?id=732935 732935]
Metadata Update from @jhrozek: - Issue assigned to jhrozek - Issue set to the milestone: SSSD 1.5.13
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