[Bug]: cron issues messages like that roughly 2-3x per day

[flaminmoe]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• Nextcloud Server is running on 64bit capable CPU, PHP and OS.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Error: Call to a member function getBodyPart() on null in /var/www/html/apps/mail/lib/IMAP/MessageMapper.php:727
Stack trace:
#0 [internal function]: OCA\Mail\IMAP\MessageMapper->OCA\Mail\IMAP{closure}()
nextcloud/server#1 /var/www/html/apps/mail/lib/IMAP/MessageMapper.php(738): array_map()
nextcloud/server#2 /var/www/html/apps/mail/lib/IMAP/PreviewEnhancer.php(86): OCA\Mail\IMAP\MessageMapper->getBodyStructureData()
nextcloud/server#3 /var/www/html/apps/mail/lib/Service/PreprocessingService.php(81): OCA\Mail\IMAP\PreviewEnhancer->process()
nextcloud/server#4 /var/www/html/apps/mail/lib/BackgroundJob/PreviewEnhancementProcessingJob.php(94): OCA\Mail\Service\PreprocessingService->process()
nextcloud/server#5 /var/www/html/lib/public/BackgroundJob/Job.php(78): OCA\Mail\BackgroundJob\PreviewEnhancementProcessingJob->run()
nextcloud/server#6 /var/www/html/lib/public/BackgroundJob/TimedJob.php(103): OCP\BackgroundJob\Job->start()
nextcloud/server#7 /var/www/html/lib/public/BackgroundJob/TimedJob.php(93): OCP\BackgroundJob\TimedJob->start()
nextcloud/server#8 /var/www/html/cron.php(152): OCP\BackgroundJob\TimedJob->execute()
nextcloud/server#9 {main}

Steps to reproduce

crontab -u www-data -l
shows:

*/5 * * * * php8.0 -f /var/www/html/cron.php

Expected behavior

no error mails

Installation method

Community Manual installation with Archive

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.0

Web server

Apache (supported)

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

Updated to a major version (ex. 22.2.3 to 23.0.1)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

root@mobian:/var/www/html# sudo -u www-data php occ config:list system
{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "mobian.inf.ethz.ch"
        ],
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "filelocking.enabled": true,
        "dbtype": "mysql",
        "version": "25.0.1.1",
        "overwrite.cli.url": "https:\/\/mobian.inf.ethz.ch",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "maintenance": false,
        "mail_smtpmode": "sendmail",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauthtype": "PLAIN",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "default_phone_region": "DE",
        "app_install_overwrite": [
            "keeweb",
            "ransomware_detection",
            "onlyoffice",
            "officeonline"
        ],
        "theme": "",
        "loglevel": 0,
        "updater.release.channel": "stable"
    }
}

List of activated Apps

root@mobian:/var/www/html# sudo -u www-data php occ app:list
Enabled:
  - activity: 2.17.0
  - admin_audit: 1.15.0
  - calendar: 4.1.0
  - circles: 25.0.0
  - cloud_federation_api: 1.8.0
  - comments: 1.15.0
  - contacts: 5.0.1
  - contactsinteraction: 1.6.0
  - dashboard: 7.5.0
  - dav: 1.24.0
  - deck: 1.8.2
  - event_update_notification: 2.0.0
  - federatedfilesharing: 1.15.0
  - federation: 1.15.0
  - files: 1.20.1
  - files_external: 1.17.0
  - files_pdfviewer: 2.6.0
  - files_rightclick: 1.4.0
  - files_sharing: 1.17.0
  - files_trashbin: 1.15.0
  - files_versions: 1.18.0
  - firstrunwizard: 2.14.0
  - groupfolders: 13.1.0
  - keeweb: 0.6.10
  - logreader: 2.10.0
  - lookup_server_connector: 1.13.0
  - mail: 2.1.4
  - music: 1.7.0
  - nextcloud_announcements: 1.14.0
  - notes: 4.6.0
  - notifications: 2.13.1
  - oauth2: 1.13.0
  - onlyoffice: 7.6.8
  - password_policy: 1.15.0
  - photos: 2.0.0
  - privacy: 1.9.0
  - provisioning_api: 1.15.0
  - recommendations: 1.4.0
  - related_resources: 1.0.3
  - serverinfo: 1.15.0
  - settings: 1.7.0
  - sharebymail: 1.15.0
  - spreed: 15.0.1
  - support: 1.8.0
  - survey_client: 1.13.0
  - systemtags: 1.15.0
  - tasks: 0.14.5
  - text: 3.6.0
  - theming: 2.0.1
  - twofactor_backupcodes: 1.14.0
  - twofactor_totp: 7.0.0
  - twofactor_webauthn: 1.0.0
  - updatenotification: 1.15.0
  - user_status: 1.5.0
  - viewer: 1.9.0
  - weather_status: 1.5.0
  - workflowengine: 2.7.0
Disabled:
  - announcementcenter: 6.4.0
  - apporder: 0.15.0
  - bruteforcesettings: 2.4.0
  - duplicatefinder: 0.0.15
  - encryption
  - passwords: 2022.11.21
  - polls: 4.0.0
  - ransomware_detection: 0.10.0
  - ransomware_protection: 1.14.0
  - suspicious_login
  - user_ldap

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

No response

Additional info

No response

[ChristophWurst]

https://github.com/nextcloud/mail/issues?q=is%3Aissue+is%3Aopen+%22getBodyPart%28%29+on+null%22

Duplicate of #7646