# Problems with running 2 instances with local APCu **URL:** \ **Category:** ℹ️ Support\ **Tags:** apcu, nc26\ **Created:** [April 24, 2023, 8:15am UTC](https://help.nextcloud.com/t/problems-with-running-2-instances-with-local-apcu/160817 "2023-04-24T08:15:10Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![ingmar3](https://help.nextcloud.com/letter_avatar/ingmar3/32/5_5575768a8748004e209b776fc1b2916d.png) [@ingmar3](https://help.nextcloud.com/u/ingmar3)\ **Post date:** [April 24, 2023, 8:15am UTC](https://help.nextcloud.com/t/problems-with-running-2-instances-with-local-apcu/160817/1 "2023-04-24T08:15:10Z")
Nextcloud version: 26.0.1 Operating system and version: Ubuntu 20.04.6 LTS Apache or nginx version: Apache 2.4.41 PHP version: 8.1 Using an LAMP-server with 2 instances of Nextcloud (no docker, just 2 domains), I faced an error 500 after updating both instances to 26.0 (and 26.0.1 doesn’t change anything). I’m using ``` 'memcache.local' => '\\OC\\Memcache\APCu' ``` I debugged the problem and realized, that the ClassLoader is getting the wrong file path and then PHP tries to include a file located in the path of the other instance. In detail the instance who first wins adds it’s path to apcu and apcu\_fetch always returns that path, even to the other instance. For one instance it’s fine, the other one fails due to open\_basedir restriction. I fixed it by changing the APCu-Prefix for one of the two instances in ./lib/base.php:601. I didn’t find a way to change the prefix in config. So is this a bug or am I doing something wrong? Do I need to configure APCu different? ---
**Author:** ![tflidd](https://help.nextcloud.com/letter_avatar/tflidd/32/5_5575768a8748004e209b776fc1b2916d.png) [@tflidd](https://help.nextcloud.com/u/tflidd)\ **Post date:** [April 24, 2023, 8:18am UTC](https://help.nextcloud.com/t/problems-with-running-2-instances-with-local-apcu/160817/2 "2023-04-24T08:18:32Z")
They have a patch for this problem already: > > > backport of #37853 and the original bug report: > > > \### ⚠️ This issue respects the following points: ⚠️ > > \- \[X\] This is a \*\*bug\*\*, …not a question or a configuration/webserver/proxy issue. > \- \[X\] This issue is \*\*not\*\* already reported on Github \_(I've searched it)\_. > \- \[X\] Nextcloud Server \*\*is\*\* up to date. See \[Maintenance and Release Schedule\](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) for supported versions. > \- \[X\] Nextcloud Server \*\*is\*\* running on 64bit capable CPU, PHP and OS. > \- \[X\] I agree to follow Nextcloud's \[Code of Conduct\](https://nextcloud.com/contribute/code-of-conduct/). > > \### Bug description > > I updated from nextcloud 25 to 26, and I have 2 instances of nextcloud running on the same server with differnet domains, databases and data folders. The open\_basedir and permission structure does not allow them to see/read each other. > > Nevertheless, after upgrading I could see errors in nextcloud.log that one instance tries to access files of the oter, and after restarting php-fpm and accessing the second instance, it tried to access files of the other as well - only the first instance I opened kept working, the second showed a HTTP500 and the errors in log with file access. > > I have \`"memcache.local": "\\\\OC\\\\Memcache\\\\Redis",\` enabled with a Redis configuration using a separate \`dbindex\` for each of the instances. > > Only after disabling \`apcu\` it worked. Even if the memcache config should use Redis with its own database. > > \### Steps to reproduce > > 1. Have 2 instances on the same system > 2. Upgrade from NC 25 to NC 26 > 3. Enable apcu > > > \### Expected behavior > > Two instances should not interfere with each other, even with apcu they should use an apcuPrefix or similar. I have no idea if this is related to the upgrade or anything else - but that's the only action I executed. > > \### Installation method > > Community Manual installation with Archive > > \### Nextcloud Server version > > 26 > > \### Operating system > > Debian/Ubuntu > > \### PHP engine version > > PHP 8.1 > > \### Web server > > Nginx > > \### Database engine version > > MySQL > > \### 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) > \--\> Also tested with a FRESH install, same behavior after adding memcached+redis config with active apcu module > > \### Are you using the Nextcloud Server Encryption module? > > None > > \### What user-backends are you using? > > \- \[X\] Default user-backend \_(database)\_ > \- \[\] LDAP/ Active Directory > \- \[\] SSO - SAML > \- \[\] Other > > \### Configuration report > > \`\`\`shell > { > "system": { > "instanceid": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "passwordsalt": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "secret": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "simpleSignUpLink.shown": false, > "trusted\_domains": \[ > "files.example.com" > \], > "datadirectory": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "overwrite.cli.url": "https:\\/\\/files.example.com", > "dbtype": "mysql", > "version": "26.0.0.11", > "dbname": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "dbhost": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "dbport": "", > "dbtableprefix": "oc\_", > "mysql.utf8mb4": true, > "dbuser": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "dbpassword": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "installed": true, > "mail\_from\_address": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "mail\_smtpmode": "smtp", > "mail\_smtpauthtype": "LOGIN", > "mail\_domain": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "maintenance": false, > "theme": "", > "memcache.local": "\\\\OC\\\\Memcache\\\\Redis", > "redis": { > "host": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "dbindex": 2, > "port": 6379 > }, > "updater.release.channel": "stable", > "mail\_smtphost": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*", > "loglevel": 2, > "default\_phone\_region": "AT", > "updater.secret": "\*\*\*REMOVED SENSITIVE VALUE\*\*\*" > } > } > \`\`\` > > > \### List of activated Apps > > \`\`\`shell > Enabled: > - activity: 2.18.0 > - circles: 26.0.0 > - cloud\_federation\_api: 1.9.0 > - comments: 1.16.0 > - contactsinteraction: 1.7.0 > - dav: 1.25.0 > - federatedfilesharing: 1.16.0 > - federation: 1.16.0 > - files: 1.21.1 > - files\_pdfviewer: 2.7.0 > - files\_rightclick: 1.5.0 > - files\_sharing: 1.18.0 > - files\_trashbin: 1.16.0 > - files\_versions: 1.19.1 > - firstrunwizard: 2.15.0 > - logreader: 2.11.0 > - lookup\_server\_connector: 1.14.0 > - nextcloud\_announcements: 1.15.0 > - notifications: 2.14.0 > - oauth2: 1.14.0 > - password\_policy: 1.16.0 > - photos: 2.2.0 > - privacy: 1.10.0 > - provisioning\_api: 1.16.0 > - recommendations: 1.5.0 > - related\_resources: 1.1.0-alpha1 > - serverinfo: 1.16.0 > - settings: 1.8.0 > - sharebymail: 1.16.0 > - support: 1.9.0 > - survey\_client: 1.14.0 > - systemtags: 1.16.0 > - text: 3.7.2 > - theming: 2.1.1 > - twofactor\_backupcodes: 1.15.0 > - updatenotification: 1.16.0 > - user\_status: 1.6.0 > - viewer: 1.10.0 > - weather\_status: 1.6.0 > - workflowengine: 2.8.0 > Disabled: > - admin\_audit: 1.16.0 > - bruteforcesettings: 2.6.0 > - dashboard: 7.6.0 (installed 7.0.0) > - encryption: 2.14.0 > - files\_external: 1.18.0 > - suspicious\_login: 4.4.0 > - twofactor\_totp: 8.0.0-alpha.0 > - user\_ldap: 1.16.0 > \`\`\` > > > \### Nextcloud Signing status > > \`\`\`shell > No errors have been found. > \`\`\` > > > \### Nextcloud Logs > Tested with a FRESH install. It worked, until I added the memcached config with Redis > > \`\`\` > 'memcache.local' =\> '\\\\OC\\\\Memcache\\\\Redis', > 'redis' =\> > array ( > 'host' =\> 'localhost', > 'dbindex' =\> 2, > 'port' =\> 6379, > ), > > \`\`\` > > \`\`\` > {"reqId":"dqf7hKO1FtScvE769qZz","level":3,"time":"2023-04-06T08:20:11+00:00","remoteAddr":"127.0.0.1","user":"webapp2","app":"PHP","method":"GET","url":"/apps/files/?dir=/&fileid=2","message":"include(): open\_basedir restriction in effect. File(/var/www/webapp1/apps/firstrunwizard/lib//AppInfo/Application.php) is not within the allowed path(s): /var/www/webapp2/:/usr/lib/php/:/var/lib/php/sessions/:/usr/share/GeoIP/:/tmp/:/opt/nextcloud-data-webapp2) at /var/www/webapp2/lib/composer/composer/ClassLoader.php#578","userAgent":"Mozilla/5.0 (X11; Linux aarch64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36","version":"26.0.0.11","data":{"app":"PHP"}} > \`\`\` > > \### Additional info > > \_No response\_ ---
**Author:** ![ingmar3](https://help.nextcloud.com/letter_avatar/ingmar3/32/5_5575768a8748004e209b776fc1b2916d.png) [@ingmar3](https://help.nextcloud.com/u/ingmar3)\ **Post date:** [April 24, 2023, 8:23am UTC](https://help.nextcloud.com/t/problems-with-running-2-instances-with-local-apcu/160817/3 "2023-04-24T08:23:05Z")
Thanks and sorry for reopening that, didn’t find that. So I wait for 26.0.2. ---
**Author:** ![wwe](https://help.nextcloud.com/user_avatar/help.nextcloud.com/wwe/32/72963_2.png) [@wwe](https://help.nextcloud.com/u/wwe)\ **Post date:** [December 14, 2024, 12:21pm UTC](https://help.nextcloud.com/t/problems-with-running-2-instances-with-local-apcu/160817/4 "2024-12-14T12:21:18Z")