Ports are duplicating across many devices at random

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1

There was an issue about this in github that was closed in July. We are still seeing this behavior. It seems to get triggered randomly after a poller is rebooted, and does not affect all devices that poller is assigned.

Ports are duplicating across many devices at random #17781

Screenshot_20250829_104303
Screenshot_20250829_104303898×555 38.2 KB

librenms@nms:~$ ./validate.php
===========================================
Component | Version
--------- | -------
LibreNMS  | 25.9.0-dev.18+847754368 (2025-08-26T15:40:09-06:00)
DB Schema | 2025_06_30_080844_add_ipv4_network_index_to_ipv4_addresses_table (354)
PHP       | 8.3.6
Python    | 3.12.3
Database  | MariaDB 10.11.13-MariaDB-0ubuntu0.24.04.1
RRDTool   | 1.7.2
SNMP      | 5.9.4.pre2
===========================================

[OK]    Composer Version: 2.8.11
[OK]    Dependencies up-to-date.
[OK]    Database Connected
[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]    Distributed Polling setting is enabled globally
[OK]    Connected to rrdcached
[OK]    Active pollers found
[OK]    Dispatcher Service not detected
[OK]    Locks are functional
[FAIL]  Some poller nodes have not checked in recently
        Inactive Nodes:
         sea-libre
[OK]    Redis is functional
[OK]    rrdtool version ok
[OK]    Connected to rrdcached
librenms@nms:~$
2

What port association mode?

3

ifIndex for all devices

Our install has distributed pollers

Here’s validate output for the poller that monitors device in screenshot:

===========================================
Component | Version
--------- | -------
LibreNMS  | 25.9.0-dev.22+b3ce49991 (2025-08-29T23:45:41-06:00)
DB Schema | 2025_06_30_080844_add_ipv4_network_index_to_ipv4_addresses_table (354)
PHP       | 8.3.6
Python    | 3.12.3
Database  | MariaDB 10.11.13-MariaDB-0ubuntu0.24.04.1
RRDTool   | 1.7.2
SNMP      | 5.9.4.pre2
===========================================

[OK]    Composer Version: 2.8.11
[OK]    Dependencies up-to-date.
[OK]    Database Connected
[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]    Distributed Polling setting is enabled globally
[OK]    Connected to rrdcached
[OK]    Active pollers found
[OK]    Dispatcher Service not detected
[OK]    Locks are functional
[OK]    Python poller wrapper is polling
[OK]    Redis is functional
[OK]    rrdtool version ok
[OK]    Connected to rrdcached

Here’s validate output for the central mysql/redis/memcached/rrdcached server

===========================================
Component | Version
--------- | -------
LibreNMS  | 25.9.0-dev.22+b3ce49991 (2025-08-29T23:45:41-06:00)
DB Schema | 2025_06_30_080844_add_ipv4_network_index_to_ipv4_addresses_table (354)
PHP       | 8.3.6
Python    | 3.12.3
Database  | MariaDB 10.11.13-MariaDB-0ubuntu0.24.04.1
RRDTool   | 1.7.2
SNMP      | 5.9.4.pre2
===========================================

[OK]    Composer Version: 2.8.11
[OK]    Dependencies up-to-date.
[OK]    Database Connected
[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]    Distributed Polling setting is enabled globally
[OK]    Connected to rrdcached
[OK]    Active pollers found
[OK]    Dispatcher Service not detected
[OK]    Locks are functional
[OK]    Python poller wrapper is polling
[OK]    Redis is functional
[OK]    rrdtool version ok
[OK]    Connected to rrdcached
4

How about discovery or poller debug output when it is duplicating the ports?