Bug in Plugin Deleted files 1.1.0 in case of using custom user quota?

[thomasimgit]

Steps to reproduce

1. set user quota to 20GB, use less than 50% of this quota, in my cas 700MB
2. enable external storage (in my case 4 local mounts)
3. delete some files from your cloud
4. check they are displayed in recycle bin, additional you also can check oc_jobs table for new jobs
5. wait some minutes according to cron running jobs table
   After cron was running, recycle bin is empty.

In case of setting user quota to a standard value like 10GB I did not observe this behaviour again.

Expected behaviour

Plugin "Deleted Files" should calculate correct in case of custom user quota limits.

Actual behaviour

Plugin "Deleted Files" delete files too soon in case of setting custom user quota.

Server configuration

Operating system:
Ubtuntu 16.4 (4.4.0-67)

Web server:
Apache/2.4.18 (Ubuntu)
delivered by Ubtunu

Database:
MariaDB
delivered by Ubtunu

PHP version:
7.0.15 and additional apcu 5.1.3
delivered by Ubtunu

Nextcloud version: (see Nextcloud admin page)
11.0.2

Where did you install Nextcloud from:
nextcloud.com

Signing status:
No errors have been found.

List of activated apps:
Enabled:

• activity: 2.4.1
• activitylog: 0.0.1
• apporder: 0.3.3
• audioplayer: 1.4.1
• calendar: 1.5.2
• comments: 1.1.0
• dav: 1.1.1
• federatedfilesharing: 1.1.1
• files: 1.6.1
• files_automatedtagging: 1.1.1
• files_downloadactivity: 1.0.1
• files_external: 1.1.2
• files_pdfviewer: 1.0.1
• files_sharing: 1.1.1
• files_texteditor: 2.2
• files_trashbin: 1.1.0
• files_versions: 1.4.0
• files_videoplayer: 1.0.0
• gallery: 16.0.0
• logreader: 2.0.0
• lookup_server_connector: 1.0.0
• nextcloud_announcements: 1.0
• notifications: 1.0.1
• password_policy: 1.1.0
• provisioning_api: 1.1.0
• serverinfo: 1.1.1
• systemtags: 1.1.3
• tasks: 0.9.5
• theming: 1.1.1
• twofactor_backupcodes: 1.0.0
• updatenotification: 1.1.1
• weather: 1.3.5
• workflowengine: 1.1.1
  Disabled:
• admin_audit
• announcementcenter
• encryption
• external
• federation
• files_accesscontrol
• files_retention
• firstrunwizard
• notes
• richdocuments
• sharebymail
• survey_client
• templateeditor
• user_external
• user_ldap
• user_saml

The content of config/config.php:

<?php
$CONFIG = array (
  'instanceid' => 'REMOVED',
  'passwordsalt' => 'REMOVED',
  'secret' => 'REMOVED',
  'trusted_domains' => 
  array (
    0 => 'REMOVED',
    1 => 'REMOVED.REMOVED.REMOVED',
  ),
  'datadirectory' => '/media/storage/nextcloud/data',
  'overwrite.cli.url' => 'http://localhost/nextcloud',
  'dbtype' => 'mysql',
  'version' => '11.0.2.7',
  'dbname' => 'REMOVED',
  'dbhost' => 'REMOVED',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'REMOVED',
  'dbpassword' => 'REMOVED',
  'logtimezone' => 'UTC',
  'installed' => true,
  'versions_retention_obligation' => '180, auto',
  'maintenance' => false,
  'trashbin_retention_obligation' => '180, auto',
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'loglevel' => 2,
  'quota_include_external_storage' => false,
  'updater.release.channel' => 'stable',
);

Are you using external storage, if yes which one: local/smb/sftp/...
local

Are you using encryption: yes/no
no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
no

Client configuration

Browser:
FF 52, Chrome 50

Operating system:
Ubuntu 16.4 , Windows 10

Logs
there are no error entrys inside the log for this problem

[thomasimgit]

Please feel free to contact me, if you need additional informations.

[MorrisJobke]

cc @icewind1991 @schiessle

[skjnldsv]

There are multiple other issues about this topic iirc.
https://help.nextcloud.com/t/trash-bin-retention-and-threshold-configuration/24650
https://docs.nextcloud.com/server/stable/user_manual/files/deleted_file_management.html