On 16/12/14 16:30, Matthias Egger wrote:
What happened:
A few weeks ago one of the LDAPS Servers which is not maintained by us
has crashed. From that moment on, users could still login to check their
emails, but they were not able to send any email through postfix (which
uses smtpd_sasl_type = dovecot)
What i do not understand, is why did dovecot not switch to the second
configured LDAPS Server? It looks like it retried for ever to reconnect
to the crashed LDAP Server.
This is speculation, but what has happened to us in the past is that the
LDAP server stopped responding to queries, but the TCP socket was still
open for connections. A new TCP connection would be established, but the
daemon would not be notified of it.
So, depending on precisely how the first LDAP server crashed, it may not
be the same test as killing the process, but closer to sending it 'kill
-STOP' (and then 'kill -CONT' afterwards, obviously)
Simon.
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