[error] filtering: removing old filter ... no such file or directory

Prerequisites

• I have checked the Wiki and Discussions and found no answer

• I have searched other issues and found no duplicates

• I want to report a bug and not ask a question or ask for help

• I have set up AdGuard Home correctly and configured clients to use it. (Use the Discussions for help with installing and configuring clients.)

Platform (OS and CPU architecture)

Raspberry Pi 4 B 1GB running latest Raspberry Pi OS 64-bit

Installation

GitHub releases or script from README

Setup

On one machine

AdGuard Home version

v0.107.64

Action

Error message in log after every (automatic) update of blocklist.

Actual result

Example:

Aug 02 10:22:52 raspberrypi AdGuardHome[1495]: 2025/08/02 10:22:52.165487 [info] filtering: saving contents id=1754068951 path=/opt/AdGuardHome/data/filters/1754068951.txt
Aug 02 10:22:52 raspberrypi AdGuardHome[1495]: 2025/08/02 10:22:52.288291 [info] filtering: filter updated id=1754068951 bytes_written=428928 rules_count=196385
Aug 02 10:22:52 raspberrypi AdGuardHome[1495]: 2025/08/02 10:22:52.288582 [info] filtering: updated filter id=1754068951 rules_count=196385 prev_rules_count=197016
Aug 02 10:22:54 raspberrypi AdGuardHome[1495]: 2025/08/02 10:22:54.057770 [error] filtering: removing old filter path=/opt/AdGuardHome/data/filters/1754068951.txt err="remove /opt/AdGuardHome/data/filters/1754068951.txt.old: no such file or directory"

[vdr-pty]

Same here:

2025/08/18 09:59:32.604369 [info] dnsproxy: entering listener loop proto=tcp addr=[::]:53
2025/08/18 12:59:38.143134 [info] filtering: saving contents id=1 path=/opt/AdGuardHome/data/filters/1.txt
2025/08/18 12:59:38.148894 [info] filtering: filter updated id=1 bytes_written=2983906 rules_count=127892
2025/08/18 12:59:38.309742 [info] filtering: saving contents id=1731178594 path=/opt/AdGuardHome/data/filters/1731178594.txt
2025/08/18 12:59:38.311489 [info] filtering: filter updated id=1731178594 bytes_written=52640 rules_count=2167
2025/08/18 12:59:38.311518 [info] filtering: updated filter id=1 rules_count=127892 prev_rules_count=124559
2025/08/18 12:59:38.311532 [info] filtering: updated filter id=1731178594 rules_count=2167 prev_rules_count=2229
2025/08/18 12:59:38.964999 [error] filtering: removing old filter path=/opt/AdGuardHome/data/filters/1.txt err="remove /opt/AdGuardHome/data/filters/1.txt.old: no such file or directory"
2025/08/18 12:59:38.965051 [error] filtering: removing old filter path=/opt/AdGuardHome/data/filters/1731178594.txt err="remove /opt/AdGuardHome/data/filters/1731178594.txt.old: no such file or directory"

[exgame]

Same here

2025/09/01 02:20:30.842269 [error] filtering: removing old filter path=/opt/adguardhome/work/data/filters/1.txt err="remove /opt/adguardhome/work/data/filters/1.txt.old: no such file or directory" 2025/09/01 02:20:30.842359 [error] filtering: removing old filter path=/opt/adguardhome/work/data/filters/1633947419.txt err="remove /opt/adguardhome/work/data/filters/1633947419.txt.old: no such file or directory" 2025/09/01 02:20:30.842374 [error] filtering: removing old filter path=/opt/adguardhome/work/data/filters/1633947422.txt err="remove /opt/adguardhome/work/data/filters/1633947422.txt.old: no such file or directory" 2025/09/01 02:20:30.842386 [error] filtering: removing old filter path=/opt/adguardhome/work/data/filters/1636752410.txt err="remove /opt/adguardhome/work/data/filters/1636752410.txt.old: no such file or directory" 2025/09/01 02:20:30.842398 [error] filtering: removing old filter path=/opt/adguardhome/work/data/filters/1671525251.txt err="remove /opt/adguardhome/work/data/filters/1671525251.txt.old: no such file or directory"

[Rar9]

+1 [error] filtering: removing old filter path=/opt/AdGuardHome/data/filters/1661989858.txt err="remove /opt/AdGuardHome/data/f>

[vdr-pty]

+1 [error] filtering: removing old filter path=/opt/AdGuardHome/data/filters/1661989858.txt err="remove /opt/AdGuardHome/data/f>

I made a fresh install with the latest version of AdguardHome, and the install create the path automatically to store the custom filters, etc

/opt/AdGuardHome/data/filters# ls -l
total 3304
-rw------- 1 root root 71108 Sep 2 04:52 1756612384.txt
-rw------- 1 root root 50208 Sep 2 04:52 1756612385.txt
-rw------- 1 root root 3049571 Sep 2 04:52 1.txt
-rw------- 1 root root 203785 Sep 2 04:52 2.txt

This path cannot be removed without losing the filter configuration.

Also, with a few hours of uptime the error appears:

2025/09/02 04:52:27.252225 [info] filtering: saving contents id=1 path=/opt/AdGuardHome/data/filters/1.txt
2025/09/02 04:52:27.265207 [info] filtering: filter updated id=1 bytes_written=3049571 rules_count=131149
2025/09/02 04:52:27.413125 [info] filtering: saving contents id=1756612385 path=/opt/AdGuardHome/data/filters/1756612385.txt
2025/09/02 04:52:27.419254 [info] filtering: filter updated id=1756612385 bytes_written=50208 rules_count=2101
2025/09/02 04:52:27.419264 [info] filtering: updated filter id=1 rules_count=131149 prev_rules_count=133882
2025/09/02 04:52:27.419269 [info] filtering: updated filter id=1756612385 rules_count=2101 prev_rules_count=2118
2025/09/02 04:52:27.636513 [error] filtering: removing old filter path=/opt/AdGuardHome/data/filters/1.txt err="remove /opt/AdGuardHome/data/filters/1.txt.old: no such file or directory"
2025/09/02 04:52:27.636528 [error] filtering: removing old filter path=/opt/AdGuardHome/data/filters/1756612385.txt err="remove /opt/AdGuardHome/data/filters/1756612385.txt.old: no such file or directory"

[ainar-g]

Those definitely need to be warnings, not errors. @schzhn, please replace the logging level there.

[vdr-pty]

Those definitely need to be warnings, not errors. @schzhn, please replace the logging level there.

They try to remove a file that does not exist, which results in an error, maybe the function that creates the file: 1.txt.old

I think the logic for this process should be:

1. The filter update process runs every 24 hours or less.
2. Filter Update Staring --> create backup file --> 1.txt.old
3. Update the file ---> 1.txt
4. If the update is successful, remove the backup file --> 1.txt.old

[schzhn]

In the v0.108.0-b.76, the severity of log messages was lowered.