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https://bugs.exim.org/show_bug.cgi?id=2597

Bug ID: 2597
Summary: LDAP lookup in smtp_accept_max_per_host does not close
file descriptor
Product: Exim
Version: 4.92
Hardware: x86-64
OS: Linux
Status: NEW
Severity: bug
Priority: medium
Component: Lookups
Assignee: unallocated@exim.org
Reporter: pcernko@mpi-klsb.mpg.de
CC: exim-dev@exim.org

Hello,

if I use an ldap lookup in smtp_accept_max_per_host, exim's main process does
not close the resulting network connection. Obviously after a while, exim dies
with:

Cannot open main log file "/var/log/exim4/mainlog": Too many open files:
euid=204 egid=209

Here's the relevant parts of my exim config:

ldap_default_servers = 127.0.0.1::636 : ldap-c.mpi-klsb.mpg.de::636 :
ldap-a.mpi-klsb.mpg.de::636 : ldap-b.mpi-klsb.mpg.de::636 :
ldap-d.mpi-klsb.mpg.de::636 : ldap0.mpi-klsb.mpg.de::636
LDAP_URL_PREFIX = ldaps:///dc=mpi-klsb,dc=mpg,dc=de

smtp_accept_max_per_host = ${if def:sender_host_address { \
${lookup ldap \

{LDAP_URL_PREFIX?ipHostNumber?sub?(&(istIsMemberOfNetgroup=ex-icinga-ph)(ipHostNumber=${quote_ldap:sender_host_address}))}
\
{40} \
{15} \
} \
}}

I'm running exim 4.92 from Debian Buster.

Feel free to contact me, if you need further information or if I should do some
tests for you.

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