Configured snmp applications keep disappearing

pleae help me to understand why an application is disappearing from host after it had been enabled and successfully polled.
Also, it should be noted in advance - only bind is disappearing, I have also enabled systemd for this particuar host and it never disappears.
However, for other hosts I have different apps that disappears, too, like borgbackup. So it is not limited to bind only.

  • Steps to reproduce an issue.
  1. Configure monitored host with SNMP v3, authPriv
  2. Configure snmp monitoring for bind with snmp extend
  3. Verify it is working locally
  4. Enable bind app in LibreNMS host configuration
  5. Observe bind is polled and graphs created in LibreNMS GUI
  6. After some time (few hours or even less) application is disabled again in host configuration and graphs disappear from LibreNMS GUI :frowning:
  • The output of ./validate.php
    [librenms@monitoring ~]$ ./validate.php
    Component | Version
    --------- | -------
    LibreNMS | 24.4.1-14-g1dc62454f (2024-04-26T23:10:24+03:00)
    DB Schema | 2024_04_22_161711_custom_maps_add_group (292)
    PHP | 8.3.6
    Python | 3.9.18
    Database | MariaDB 11.3.2-MariaDB
    RRDTool | 1.7.2
    SNMP | 5.9.1

[OK] Composer Version: 2.7.4
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database Schema is current
[OK] SQL Server meets minimum requirements
[OK] lower_case_table_names is enabled
[OK] MySQL engine is optimal
[OK] Database and column collations are correct
[OK] Database schema correct
[OK] MySQL and PHP time match
[OK] Active pollers found
[OK] Dispatcher Service not detected
[OK] Locks are functional
[OK] Python poller wrapper is polling
[OK] Redis is unavailable
[OK] rrdtool version ok
[OK] Connected to rrdcached
[librenms@monitoring ~]$

Poller output

Screenshot from monitored application (bind) with gaps.