# Warning in Logfile

**URL:** <https://help.nextcloud.com/t/warning-in-logfile/237665>\
**Category:** ℹ️ Support\
**Tags:** nc32, onlyoffice, nextcloudlog, setup\_warning\
**Created:** [December 21, 2025, 1:41pm UTC](https://help.nextcloud.com/t/warning-in-logfile/237665 "2025-12-21T13:41:04Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![smartysmart34](https://help.nextcloud.com/user_avatar/help.nextcloud.com/smartysmart34/32/16168_2.png) [@smartysmart34](https://help.nextcloud.com/u/smartysmart34)\
**Post date:** [December 21, 2025, 1:41pm UTC](https://help.nextcloud.com/t/warning-in-logfile/237665/1 "2025-12-21T13:41:04Z")

</div>

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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can. ❤

## The Basics

- Nextcloud Server version _(e.g., 29.x.x)_:
  - `32.0.3`

- Operating system and version _(e.g., Ubuntu 24.04)_:
  - `Opensuse Leap 16.0`

- Web server and version _(e.g, Apache 2.4.25)_:
  - `nginx`

- Reverse proxy and version \_(e.g. nginx 1.27.2)
  - `nginx`

- PHP version _(e.g, 8.3)_:
  - `8.4`

- Is this the first time you’ve seen this error? (Yes / No):
  - `No`

- When did this problem seem to first start?
  - `a long while ago. But it is annoying by now.`

- Installation method _(e.g. AlO, NCP, Bare Metal/Archive, etc.)_
  - `Bare metal`

- Are you using CloudfIare, mod\_security, or similar? _(Yes / No)_
  - `No`

### Summary of the issue you are facing:

I use Onlyoffice in a Docker container, lined into my Nextcloud instance via the Onlyoffice Connector. I CAN open and edit Files, I can see no issue in functionality. I am NOT using Colabora. Every once in a while I see the following entries in the Nextcloud log (GUI)

```auto
exec(): Unable to fork \[command -v -- 'openoffice'\] at /srv/www/htdocs/Nextcloud/3rdparty/symfony/process/ExecutableFinder.php#97

```

and:

```auto
exec(): Unable to fork \[command -v -- 'libreoffice'\] at /srv/www/htdocs/Nextcloud/3rdparty/symfony/process/ExecutableFinder.php#97

```

So once Libreoffice, once Openoffice, neither of which I am using. There is a Docker container running Onlyoffice and it is connected and does work.

How can I get rid of these messages?

### Steps to replicate it (hint: details matter!):

1. In my case: Install NExtcloud

2. Instal and connect Onlyoffice in a Docker container

3. Log in, open Office Files

4. Check the Event log in the Web GUI when logged in as an admin

### Log entries

#### Nextcloud

Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the _Copy raw_ option from _Administration settings-\>Logging_ screen or from your `nextcloud.log` located in your data directory). Feel free to use a pastebin/gist service if necessary.

```auto
PASTE HERE

```

#### Web Browser

If the problem is related to the Web interface, open your browser inspector _Console_ and _Network_ tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.

```auto
PASTE

```

#### Web server / Reverse Proxy

The output of your Apache/nginx/system log in `/var/log/ ____ `:

```auto
PASTE HERE

```

### Configuration

#### Nextcloud

The output of `occ config:list system` or similar is best, but, if not possible, the contents of your `config.php` file from `/path/to/nextcloud` is fine (make sure to remove any identifiable information!):

```auto
PASTE HERE

```

#### Apps

The output of `occ app:list` (if possible).

### Tips for increasing the likelihood of a response

- Use the `preformatted text` formatting option in the editor for all log entries and configuration output.
- If screenshots are useful, feel free to include them.
  - If possible, also include key error output in text form so it can be searched for.

- Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.

---

<div class="post-metadata">

**Author:** ![jtr](https://help.nextcloud.com/letter_avatar/jtr/32/6_22734026db12803ebb3e059622ac3534.png) [@jtr](https://help.nextcloud.com/u/jtr)\
**Post date:** [December 21, 2025, 6:52pm UTC](https://help.nextcloud.com/t/warning-in-logfile/237665/2 "2025-12-21T18:52:58Z")

</div>

It’s challenging to assist since you didn’t include your config nor app list.

`preview_libreoffice_path` comes to mind.

That error shouldn’t normally occur though.

The error itself indicates the shell can’t be executed at all (e.g., /bin/sh missing, permissions issue, or fork failure due to resource problems).

---

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**Author:** ![smartysmart34](https://help.nextcloud.com/user_avatar/help.nextcloud.com/smartysmart34/32/16168_2.png) [@smartysmart34](https://help.nextcloud.com/u/smartysmart34)\
**Post date:** [December 22, 2025, 7:10am UTC](https://help.nextcloud.com/t/warning-in-logfile/237665/3 "2025-12-22T07:10:17Z")

</div>

Hello jtr.

Thank you for the right hint maybe. At some point a while ago I activated AppArmor and yes, I remember declining shell authorization as I didnt see a reason why Nextcloud should be authorized to start shells (for the same reason I don’t use the APP API to not have nextcloud basically administer Docker).

But why would nextcloud anyways want to try and start libreoffice or Openoffice? I don’t understand this.

I will try and check the parameter you mentioned.

Update: I neither have the “enable previews” set, nor the libreoffice path. These parameters don’t exist in my config.php file…

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<div class="post-metadata">

**Author:** ![smartysmart34](https://help.nextcloud.com/user_avatar/help.nextcloud.com/smartysmart34/32/16168_2.png) [@smartysmart34](https://help.nextcloud.com/u/smartysmart34)\
**Post date:** [December 23, 2025, 6:07am UTC](https://help.nextcloud.com/t/warning-in-logfile/237665/4 "2025-12-23T06:07:56Z")

</div>

Hello all, to whom it may concern: I solved the issue now. Basically the hint regarding the Previews was the right one.

Turns out: Even when the config.php has NO mention of previews at all, the Nextcloud default kicks in and that includes the generation of previews for office files for which it will try to use a locally installed libreoffice/openoffice.

To switch this off, one needs to ADD a preview section to config.php and that section shall NOT have the office formats. This will stop the error message.

Instead, in the Onlyoffice connector settings, one can select Onlyoffice to then generate the previews for the office files. → Problem solved.

Cheers and merry christmas everyone!

---

<div class="post-metadata">

**Author:** ![jtr](https://help.nextcloud.com/letter_avatar/jtr/32/6_22734026db12803ebb3e059622ac3534.png) [@jtr](https://help.nextcloud.com/u/jtr)\
**Post date:** [December 23, 2025, 4:24pm UTC](https://help.nextcloud.com/t/warning-in-logfile/237665/5 "2025-12-23T16:24:36Z")

</div>

> [@smartysmart34](#):
>
> Update: I neither have the “enable previews” set, nor the libreoffice path. These parameters don’t exist in my config.php file…

Yeah there’s a default value for `enabledPreviewProviders` as documented in the _[Admin Manual](https://docs.nextcloud.com/server/stable/admin_manual/)_ [here](https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/config_sample_php_parameters.html#enabledpreviewproviders).

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<div class="post-metadata">

**Author:** ![system](https://help.nextcloud.com/user_avatar/help.nextcloud.com/system/32/29333_2.png) [@system](https://help.nextcloud.com/u/system)\
**Post date:** [December 31, 2025, 4:25pm UTC](https://help.nextcloud.com/t/warning-in-logfile/237665/6 "2025-12-31T16:25:25Z")

</div>

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