[Bug]: Web updater fails integrity check after long download

⚠️ 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 OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

When the download takes very long, the "Verifying integrity" step fails. Maybe the session expires (?)

Steps to reproduce

1. Update via Web UI
2. Slow down download
3. After (rough estimate) 20 minutes, the verify step will fail
4. log out
5. log back in
6. continue update
7. verify step succeeds

Expected behavior

No session expiry or instructions on how to recover (maybe s.th. like "Please log in again and continue update")

Nextcloud Server version

29

Operating system

Other

PHP engine version

PHP 8.2

Web server

Nginx

Database engine version

PostgreSQL

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

Updated from a MINOR version (ex. 32.0.1 to 32.0.2)

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

{                                                                                                                                                                                                                    
    "system": {                                                                                                                                                                                                      
        "instanceid": "***REMOVED SENSITIVE VALUE***",                                                                                                                                                               
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",                                                                                                                                                             
        "secret": "***REMOVED SENSITIVE VALUE***",                                                        
        "trusted_domains": [                                                                              
            "cloud.feldmochinger.de"                                                                      
        ],                                                                                                
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",                                               
        "overwritecondaddr": "^192\\.168\\.101\\.1$",                                                     
        "datadirectory": "***REMOVED SENSITIVE VALUE***",                                                 
        "overwrite.cli.url": "https:\/\/cloud.feldmochinger.de",                                          
        "dbtype": "pgsql",                                                                                
        "version": "29.0.13.2",                                                                           
        "dbname": "***REMOVED SENSITIVE VALUE***",                                                        
        "dbhost": "***REMOVED SENSITIVE VALUE***",                                                        
        "dbtableprefix": "oc_",                                                                           
        "dbuser": "***REMOVED SENSITIVE VALUE***",                                                        
        "dbpassword": "***REMOVED SENSITIVE VALUE***",                                                    
        "installed": true,                                                                                
        "memcache.local": "\\OC\\Memcache\\APCu",                                                         
        "memcache.locking": "\\OC\\Memcache\\APCu",                                                       
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",                                             
        "mail_smtpmode": "sendmail",                                                                      
        "mail_domain": "***REMOVED SENSITIVE VALUE***",                                                   
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",                                                 
        "mail_smtpport": "25",                                                                            
        "simpleSignUpLink.shown": false,                                                                  
        "maintenance": false,           
        "theme": "",                    
        "loglevel": 2,                                                                                    
        "default_phone_region": "DE",                                                                     
        "mail_sendmailmode": "pipe", 
        "maintenance_window_start": 2                                                                     
    }                                
}

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

updater.log:

2024-05-24T14:20:54+0000 O3JFtchEjc [info] Step 3 is in state "end".
2024-05-24T14:20:54+0000 O3JFtchEjc [info] POST request for step "4"
2024-05-24T14:20:54+0000 O3JFtchEjc [error] POST request failed with other exception
2024-05-24T14:20:54+0000 O3JFtchEjc [error] Exception: Exception
Message: Not authenticated
Code:0
Trace:
#0 {main}
File:/var/www/hosts/cloud/htdocs/updater/index.php
Line:1325

Additional info

No response

Start with updater/index.php around line 1325 and the updater.log entry for the failed POST request for step 4. Reproduce the web update with a deliberately slow download and trace the authentication state through verification. Done means the integrity-check step either remains usable after a long download or clearly tells the user how to recover.