Scheduled recurring maintenance shows devices constantly under maintenance

Tags: #<Tag:0x00007fb04a05b278>

I think I found a bug in the maintenance window scheduler of the current LibreNMS version.

Short description:
When I set a recurring maintenance window for a device group of ICMP monitored devices (ping), the devices from that group constantly show up as if the maintenance window is currently ongoing, but it is not.

Here is screenshot of my maintenance window settings how I set them…

… it then shows with the status “SET” in the list of scheduled maintenance windows, which is fine.

Problem: The availability map on the dashboard showing the devices constantly greyed out as if they are under maintenance, but it is currently around 8 o’clock in the morning. The maint. window should last from midnight until 05:00.
The device also has the wrench symbol next its name in the details, indicating the ongoing maintenance.

Here the output of the validate.php:
[email protected]:~$ ./validate.php
Component | Version
--------- | -------
LibreNMS | 21.3.0-71-gecb87d967
DB Schema | 2021_02_09_122930_migrate_to_utf8mb4 (205)
PHP | 7.4.3
Python | 3.8.5
MySQL | 10.3.25-MariaDB-0ubuntu0.20.04.1
RRDTool | 1.7.2

[OK]    Composer Version: 2.0.12
[OK]    Dependencies up-to-date.
[OK]    Database connection successful
[OK]    Database schema correct

Devices are shown as under maintenance for the whole day when the maintenance occurs, although they have a time window of only 3 hours where the maintenance is acutally scheduled.

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