[SOLVED] How to recover: "PDOException: could not find driver in /srv/nextcloud/html/3rdparty/doctrine/dbal/src/Driver/PDO/PDOConnect.php:28"

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1

The Basics

  • Nextcloud Server version: 33.0.8
  • Operating system and version: Debian 13.6
  • Web server and version: apache2/2.4.68-1~deb13u1
  • Reverse proxy and version: none
  • PHP version: 8.4
  • Is this the first time you’ve seen this error?: Yes
  • When did this problem seem to first start?
    • When attempting to 'maintenance:repair'
  • Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
  • Are you using CloudfIare, mod_security, or similar?: No

Summary of the issue you are facing:

During an attempted upgrade, I mistakenly removed the entire Nextcloud …/html/ directory. Realising this was a problem I attempted to recover:

  • Ensure the Nextcloud database is not damaged.
  • Ensure the Nextcloud …/data/ directory is not damaged.
  • Restore the Nextcloud …/html/config/ directory.
  • Download the Nextcloud installation archive from https://download.nextcloud.com/server/releases/nextcloud-33.0.8.zip
    • Unpack that installation archive to …/html/.
  • Run … occ maintenance:repair command to correct this broken Nextcloud instance.

Nextcloud crashes, complaining (accurately) that a file it wants is not in …/html/3rdparty/.

How can I continue the repair beyond this point; how do I provide Nextcloud the correct contents of …/html/3rdparty/? It does not appear in the installation archive, nor in any backup I have.

I assume there might be many more files Nextcloud expects to find in that directory. How can I get the repair complete without those files; alternatively, how can I find and install those files correctly?

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

  1. Make the mistake of deleting everything within …/html/.

  2. Restore the …/html/config/ directory.

  3. Download and install Nextcloud installation archive nextcloud-33.0.8.zip into …/html/.

  4. Run Nextcloud admin command … occ maintenance:repair.

Nextcloud crashes with a traceback:

An unhandled exception has been thrown:
PDOException: could not find driver in /srv/nextcloud/html/3rdparty/doctrine/dbal/src/Driver/PDO/PDOConnect.php:28
Stack trace:
…

Configuration

Nextcloud

<?php

$CONFIG = array(
    'instanceid' => 'REDACTED',
    'passwordsalt' => 'REDACTED',
    'secret' => 'REDACTED',
    'config_is_read_only' => false,
    'installed' => true,
    'log_type' => 'syslog',
    'logdateformat' => DateTime::ISO8601,
    'maintenance' => false,
    'maintenance_window_start' => 23,
    'trusted_domains' => [
        'REDACTED.example.org',
    ],
    'overwrite.cli.url' => 'https://REDACTED.example.org/nextcloud',
    'htaccess.RewriteBase' => '/nextcloud',
    'mail_from_address' => 'nextcloud',
    'mail_domain' => 'REDACTED.example.org',
    'mail_send_plaintext_only' => true,
    'default_language' => 'en',
    'default_locale' => 'en_AU',
    'default_phone_region' => 'AU',
    'trashbin_retention_obligation' => 'auto, 30',
    'memcache.locking' => '\\OC\\Memcache\\Redis',
    'redis' => array(
        'host' => 'localhost',
        'port' => 6379,
        'timeout' => 0.0,
        'password' => '',
    ),
);
?>
2

That’s the official source repo snapshot, but not an installation asset. For example, it lacks 3rdparty/ and other core components located in other repositories, that are required for an actual installation.

Please use the official Archive download links.

3

When did that change? I’ve been installing from those archives for years without a problem.

Looking in the installation page today, it leads me to a file in the same directory, but with no Nextcloud version (‘latest.zip’). This is not suitable for a reliable automated install, I need to download the file for the specific version I’ve chosen, for a reproducible deployment. So which file should I be using for that?

The only archive files there that are marked by full version number (e.g. “33.0.8”), are the files named starting with ‘nextcloud’ (e.g. https://download.nextcloud.com/server/releases/nextcloud-33.0.8.zip for version “33.0.8”). If you say I should not be using those, which file with a fully-specified version URL are you saying I should install?

Also this does not seem to do much to address the problem I face immediately: How do I get the ‘3rdparty’ directory populated correctly, for some specific Nextcloud version?

4

Attempting to proceed:

  • Downloaded ‘latest-33.zip’ and unpacked it to a temporary directory.
  • Replaced (removed existing, copied from the unpacked files) the ‘3rdparty/’ directory.

When I run …/occ maintenance:repair I get the same crash and error as initially reported.

How do I determine what files are needed, and how to install precisely those files to satisfy this Nextcloud instance to the point it can repair?

5

My bad. I completely misread the URL; I thought you were pulling it from the GitHub link. I blame my mobile device I was reading your message on yesterday. :slight_smile: Sorry about that.

6

The full stack trace would be more helpful, but this isn’t say a file is missing from 3rdparty. It’s saying the PHP extension for your database isn’t installed.

I don’t see any database configuration in your provided config file.

7

Thank you for this. It prompted me to verify the restored configuration, and indeed the database connection settings were not there.

I now have the database settings in one place, where the ‘autoconfig.php’ and ‘config.php’ can both use them. With this in place, the error ceases and I can continue.