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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-20028

zabbix-agent2 5.4.5 broken, probably leaking file descriptors

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Details

    • Problem report
    • Status: Confirmed
    • Trivial
    • Resolution: Unresolved
    • 5.4.5
    • None
    • Agent (G)

    Description

      After upgrade from 5.4.4 to 5.4.5 zabbix-agent2 basically stopped working.

      The issue disappeared immediately after downgrade back to 5.4.4

       

      Steps to reproduce:

      1. Upgrade from zabbix-agent2 5.4.4 to zabbix-agent2 5.4.5

      Result:
      Agent unusable, checks failing

      From the zabbix-agent2 log:

      2021/09/29 16:30:43.246468 Zabbix Agent 2 stopped. (5.4.4)
      2021/09/30 00:30:43.343153 Starting Zabbix Agent 2 (5.4.5)
      2021/09/30 00:30:43.343718 OpenSSL library (OpenSSL 1.1.1g FIPS 21 Apr 2020) initialized
      2021/09/30 00:30:43.343793 using configuration file: /etc/zabbix/zabbix_agent2.conf
      2021/09/30 00:30:43.343861 using plugin 'Agent' providing following interfaces: exporter
      ...
      2021/09/30 00:30:43.344074 using plugin 'ZabbixSync' providing following interfaces: exporter
      2021/09/30 00:30:43.344172 Zabbix Agent2 hostname: [monitored01]
      2021/09/30 00:30:44.284060 [Postgres] Connection failed: failed to connect to `host=localhost user=zbx_monitor database=postgres`: hostname resolving error (lookup localhost: no suc
      h host).
      2021/09/30 00:30:44.443604 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443619 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443624 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443629 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443633 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443640 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443645 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443649 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443654 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      2021/09/30 00:30:44.443658 cannot accept incoming connection: accept tcp [::]:10050: accept4: too many open files
      ....
      2021/09/30 00:30:44.446318 [Postgres] Connection failed: failed to connect to `host=localhost user=zbx_monitor database=postgres`: hostname resolving error (lookup localhost: no such host).

      Expected:
      Agent working normally

      zabbix-agent2.conf

      ControlSocket=/tmp/agent.sock
      HostMetadata=Linux
      Hostname=MONITORED01
      Include=/etc/zabbix/zabbix_agent2.d/*.conf
      LogFileSize=0
      LogFile=/var/log/zabbix/zabbix_agent2.log
      PidFile=/var/run/zabbix/zabbix_agent2.pid
      Server=10.xx.xx.xxx,10.xx.xx.xxx,10.xx.xxx.xx,10.xx.xxx.xx,10.x.xx.xx

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            zabbix.dev Zabbix Development Team
            nohal Pavel Kalian
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            Dates

              Created:
              Updated: