Contacts do not show in web app for all users any more

[h3rb3rt]

This is a copy of the bug ticket already created (Contacts do not show in web app for all users any more · Issue #3253 · nextcloud/contacts · GitHub) hoping someone could help me and the NC team to fix it even faster.

Thanks

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Describe the bug

I assume since the last version of contacts got installed, the contacts app is empty for all users. DAVx seems to synronize without errors, so I must assume that the contacts are still stored in the DB but the web app cannot read the information.

https://sub.exampel.com/apps/contacts/Alle%20Kontakte

Steps to reproduce

1. Go to Contacts
2. Empty

Expected behavior

I should see my few hundred contacts and groups

Actual behavior

empty contact list, except the circles nothing shows up

Contact version

5.1.0

Operating system

NCP (https://hub.docker.com/r/ownyourbits/nextcloudpi)

PHP engine version

PHP 8.1

Web server

Apache (supported)

Database

MariaDB

Additional info

This is what I see in the docker log when opening the contacts app, even though it makes no sense because everything else works.

2023-02-27 13:22:59 650 [Warning] Aborted connection 650 to db: 'nextcloud' user: 'ncadmin' host: 'localhost' (Got an error reading communication packets)

2023-02-27 13:22:59 651 [Warning] Aborted connection 651 to db: 'nextcloud' user: 'ncadmin' host: 'localhost' (Got an error reading communication packets)

[h3rb3rt]

There seems someone else having the same - unfixed - problem

Contacts menu links to contacts app with no contacts

Hi! When I click on the contact icon in the menu on the right, I see a list of all users in the organization. I scroll down and it says “Show all contacts,” and I click on that link and it takes me to the Contacts App which is blank. According to some other posts , the Contacts Menu button is not related to the Contacts App. [Screen Shot 2023-01-05 at 19.44.32] My questions: Why don’t I see all contacts from the contact menu in the contacts app? Why does the contact menu link to the contact…

[Assim]

Hi, after update I have same problem. Thank you for any help.

[h3rb3rt]

I am still investigating but this is the closest I got so far

memcache file locking very unreliable

[h3rb3rt]

Contacts do not show in web app for all users any more

The last 5 days I had not problem with the contacts app loading, any more. Seems that the initial error

2023-02-27 13:22:59 650 [Warning] Aborted connection 650 to db: 'nextcloud' user: 'ncadmin' host: 'localhost' (Got an error reading communication packets)
2023-02-27 13:22:59 651 [Warning] Aborted connection 651 to db: 'nextcloud' user: 'ncadmin' host: 'localhost' (Got an error reading communication packets)

Gets solved by @szaimen idea of raising the max_allowed_packed value. I raised it to 256MB but I cannot say if it is too much or not enough.
I am still wondering what has changed from the previous contacts web app to the one raising the error in my setup. Perhaps this could be checked by nextcloud to have a proper max_allowed_packet value.