NC not reachable after failed DAV sync

ℹ️ Support
,
1

Hello!

I am currently running an Ubuntu 18.04.3 server with NC 16.0.6 and dav 1.9.2. The nginx version is 1.17.5 and php 7.3.11.

I am no longer able to access NC via the web browser nor the desktop sync client. Perhaps the issue is connected to a failed attempt to setup contact sync from my phone using davX5 just before the problems occured.
Utilizing the occ command I have found the following:

occ app:check-code dav
Analysing /var/www/nextcloud/apps/dav/lib/CardDAV/CardDavBackend.php
 1 errors
    line 1156: != - is discouraged
Analysing /var/www/nextcloud/apps/dav/lib/CardDAV/PhotoCache.php
 1 errors
    line  143: OC_Image - private class must not be instantiated
Analysing /var/www/nextcloud/apps/dav/lib/Files/Sharing/FilesDropPlugin.php
 1 errors
    line   80: OC_Helper - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Files/BrowserErrorPagePlugin.php
 2 errors
    line   27: OC_Template - private class must not be imported with a use statement
    line   94: OC_Template - private class must not be instantiated
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/BearerAuth.php
 2 errors
    line   64: OC_Util - Static method of private class must not be called
    line   73: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/Node.php
 1 errors
    line  227: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php
 1 errors
    line  333: OC_Helper - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/File.php
 8 errors
    line  208: OC_Helper - Static method of private class must not be called
    line  336: OC_Hook - Static method of private class must not be called
    line  341: OC_Hook - Static method of private class must not be called
    line  346: OC_Hook - Static method of private class must not be called
    line  362: OC_Hook - Static method of private class must not be called
    line  366: OC_Hook - Static method of private class must not be called
    line  370: OC_Hook - Static method of private class must not be called
    line  456: OCP\App - Static method of deprecated class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/Auth.php
 5 errors
    line  124: OC_Util - Static method of private class must not be called
    line  128: OC_Util - Static method of private class must not be called
    line  131: OC_Util - Static method of private class must not be called
    line  236: OC_User - Static method of private class must not be called
    line  239: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/PublicAuth.php
 1 errors
    line   96: OC_User - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/v2/remote.php
 1 errors
    line   31: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/v2/direct.php
 1 errors
    line   32: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/v1/webdav.php
 1 errors
    line   37: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/v1/publicwebdav.php
 4 errors
    line   34: OC_App - Static method of private class must not be called
    line   36: OC_Util - Static method of private class must not be called
    line   85: OC_Util - Static method of private class must not be called
    line   86: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/app.php
 1 errors
    line   30: OC_App - Static method of private class must not be called
App is not compliant

When I experienced problems with other apps in the past I was often able to resolve them by disabling the app, usually allowing me to log back into NC via the web browser. However disabling dav is not possible.

occ app:disable dav
dav can't be disabled.

The nginx error log shows this line:

2019/11/16 10:49:00 [crit] 954#954: *1 connect() to unix:/run/php/php7.2-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: **ip_removed**, server: **server_removed**, request: "PROPFIND /remote.php/dav/files/Felix/Documents/KPS HTTP/2.0", upstream: "fastcgi://unix:/run/php/php7.2-fpm.sock:", host: "**host_removed**"

Do you have any suggestions how to proceed from here? How can I interpret the errors? Is there a way to “reset” dav?

This is the current dav config: 
    "apps": {
        "dav": {
            "buildCalendarSearchIndex": "yes",
            "chunks_migrated": "1",
            "enabled": "yes",
            "generateBirthdayCalendar": "no",
            "installed_version": "1.9.2",
            "regeneratedBirthdayCalendarsForYearFix": "yes",
            "types": "filesystem"
        }
    }

Thanks for your help!

Felix

2

It’s probably your php-fpm that crashed. You can restart, should be something like service php-fpm start or service php7.2-fpm start.

Don’t forget to check the logs why it crashed (should be in some apache-log or some dedicated php-fpm log, or syslog). In doubt, you can check to enable more specific logging in case it happens again.

3

Probably the wrong socket is used because nginx complains about php7.2-fpm.sock but php7.3-fpm.sock should be used?

4

I had restarted php previously without being able to reach NC afterwards. However I did give it another try now and NC is available again:

service php7.2-fpm restart

Thanks a lot for that easy fix :clap:

I’ve also updated to php 7.3.11

In addition my update channel suggested an update to 17.0.1 now, which I performed hoping to get rid of the DAV app check-code errors. However, they have hardly changed.

occ app:check-code dav 
Analysing /var/www/nextcloud/apps/dav/lib/CardDAV/CardDavBackend.php
 1 errors
    line 1162: != - is discouraged
Analysing /var/www/nextcloud/apps/dav/lib/CardDAV/PhotoCache.php
 1 errors
    line  143: OC_Image - private class must not be instantiated
Analysing /var/www/nextcloud/apps/dav/lib/CalDAV/Schedule/IMipPlugin.php
 1 errors
    line  245: == - is discouraged
Analysing /var/www/nextcloud/apps/dav/lib/Files/Sharing/FilesDropPlugin.php
 1 errors
    line   80: OC_Helper - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Files/BrowserErrorPagePlugin.php
 2 errors
    line   27: OC_Template - private class must not be imported with a use statement
    line   94: OC_Template - private class must not be instantiated
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/BearerAuth.php
 2 errors
    line   64: OC_Util - Static method of private class must not be called
    line   73: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/Node.php
 1 errors
    line  227: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php
 1 errors
    line  333: OC_Helper - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/File.php
 8 errors
    line  208: OC_Helper - Static method of private class must not be called
    line  336: OC_Hook - Static method of private class must not be called
    line  341: OC_Hook - Static method of private class must not be called
    line  346: OC_Hook - Static method of private class must not be called
    line  362: OC_Hook - Static method of private class must not be called
    line  366: OC_Hook - Static method of private class must not be called
    line  370: OC_Hook - Static method of private class must not be called
    line  456: OCP\App - Static method of deprecated class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/Sabre/Auth.php
 5 errors
    line  124: OC_Util - Static method of private class must not be called
    line  128: OC_Util - Static method of private class must not be called
    line  131: OC_Util - Static method of private class must not be called
    line  236: OC_User - Static method of private class must not be called
    line  239: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/lib/Connector/PublicAuth.php
 1 errors
    line   96: OC_User - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/v2/remote.php
 1 errors
    line   31: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/v2/direct.php
 1 errors
    line   32: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/v1/webdav.php
 1 errors
    line   37: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/v1/publicwebdav.php
 4 errors
    line   34: OC_App - Static method of private class must not be called
    line   36: OC_Util - Static method of private class must not be called
    line   85: OC_Util - Static method of private class must not be called
    line   86: OC_Util - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/dav/appinfo/app.php
 1 errors
    line   30: OC_App - Static method of private class must not be called
App is not compliant

I have also realized now, that I get the “app is not compliant” check-code result for several other apps like files. Is this something I should to dig into? The admin page does not show any security or setup warnings.

5

if you run the occ command, make sure you use the right php version (especially if you have different installed on your computer):

sudo -u www-data php7.3 occ ...

6

Good point, but it’s also the case with the correct php version.