Many PHP errors in the log - illegal offset type in multiple files relating to memory and users

[linucksrox]

Steps to reproduce

Upgrade to 14.0.2 and check the logs

Expected behaviour

No errors

Actual behaviour

Lots of errors

Server configuration

Operating system:
Ubuntu 16.04

Web server:
Apache 2.4

Database:
MySQL 5.7

PHP version:
7.0

Nextcloud version: (see Nextcloud admin page)
14.0.2

Updated from an older Nextcloud/ownCloud or fresh install:
Just upgraded from 13.0.6

Where did you install Nextcloud from:
The internet 😉

I'm using LDAP for user authentication, and noticed on the Users list that people are listed 2 or 3 times when I scroll to the end. I'm not sure if this is related or not, but it's worth mentioning.

These errors spew into the logs during each cron run:

Error | PHP | Illegal offset type in isset or empty at /var/www/nextcloud/lib/private/User/Manager.php#135
Error | PHP | Array to string conversion at /var/www/nextcloud/lib/private/User/Database.php#340
Error | PHP | Illegal offset type at /var/www/nextcloud/lib/private/Cache/CappedMemoryCache.php#73
Error | PHP | Illegal offset type in isset or empty at /var/www/nextcloud/lib/private/User/Manager.php#155
Error | PHP | Illegal offset type in isset or empty at /var/www/nextcloud/lib/private/Cache/CappedMemoryCache.php#42
Error | PHP | Array to string conversion at /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php#105
Error | PHP | Illegal offset type at /var/www/nextcloud/lib/private/Cache/CappedMemoryCache.php#53
Error | PHP | Illegal offset type in isset or empty at /var/www/nextcloud/lib/private/Cache/CappedMemoryCache.php#42
Error | PHP | Array to string conversion at /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php#105
Error | PHP | Illegal offset type at /var/www/nextcloud/lib/private/Cache/CappedMemoryCache.php#53
Error | PHP | Illegal offset type at /var/www/nextcloud/lib/private/User/Manager.php#161

... and repeat

Possibly unrelated, but I saw this once mixed in between, triggered by going to the Users list page:

Error | PHP | ldap_search(): Partial search results returned: Sizelimit exceeded at /var/www/nextcloud/apps/user_ldap/lib/LDAP.php#293

[nextcloud-bot]

GitMate.io thinks possibly related issues are #6784 (Php error?), #3483 (Many errors in log), #4201 (Multiple Errors), #285 (PHP error in logfile), and #10808 (File drop for logged in users).

[PpaiSanchez]

See here: nextcloud/fulltextsearch#395
This has something to do with these apps: Full text search - Elasticsearch

[linucksrox]

Thanks for the information. Not production ready... time to abandon full text search.