Module 'wddx' already loaded at Unknown#0

Nextcloud version (eg, 12.0.2): 13.0.1
Operating system and version (eg, Ubuntu 17.04): FreeNAS-11.1-U4
Apache or nginx version (eg, Apache 2.4.25): nginx 1.12.2
PHP version (eg, 7.1): 7.0

The issue you are facing: I am seeing the following error in the logs every few minutes:

Module ‘wddx’ already loaded at Unknown#0

As near as I can tell, nothing is affected by it, except possibly the updater. I was not able to update from 13.0.0 to 13.0.1 with the WebUI. I had to do it from the command prompt. I’m not sure if this is related, but it’s the only problem I’ve had. I was seeing the error on 13.0.0 as well as 13.0.1.

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

I don’t have to do anything. I just look at the log, and it’s there.

The output of your Nextcloud log in Admin > Logging:

|Error|PHP|Module ‘wddx’ already loaded at Unknown#0|2018-03-30T16:01:29-0500|
|Error|PHP|Module ‘wddx’ already loaded at Unknown#0|2018-03-30T16:01:17-0500|
|Error|PHP|Module ‘wddx’ already loaded at Unknown#0|2018-03-30T16:00:00-0500|
|Error|PHP|Module ‘wddx’ already loaded at Unknown#0|2018-03-30T15:46:59-0500|
|Error|PHP|Module ‘wddx’ already loaded at Unknown#0|2018-03-30T15:46:12-0500|

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

$CONFIG = array (
‘instanceid’ => ‘myid’,
‘passwordsalt’ => ‘’,
‘secret’ => '
’,
‘trusted_domains’ =>
array (
0 => ‘’,
1 => '
’,
2 => ‘*’,
),
‘datadirectory’ => ‘/mnt/files/data’,
‘overwrite.cli.url’ => ‘https://cloud.mydomain.com’,
‘dbtype’ => ‘mysql’,
‘version’ => ‘13.0.1.1’,
‘dbname’ => ‘dbname’,
‘dbhost’ => ‘dbhost’,
‘dbport’ => ‘’,
‘dbtableprefix’ => ‘oc_’,
‘dbuser’ => ‘dbuser’,
‘dbpassword’ => ‘dbpass’,
‘logtimezone’ => ‘UTC’,
‘installed’ => true,
‘memcache.local’ => ‘\OC\Memcache\APCu’,
‘memcache.locking’ => ‘\OC\Memcache\Redis’,
‘redis’ =>
array (
‘host’ => ‘/tmp/redis.sock’,
‘port’ => 0,
),
‘enable_previews’ => true,
‘enabledPreviewProviders’ =>
array (
0 => ‘OC\Preview\PNG’,
1 => ‘OC\Preview\JPEG’,
2 => ‘OC\Preview\GIF’,
3 => ‘OC\Preview\BMP’,
4 => ‘OC\Preview\XBitmap’,
5 => ‘OC\Preview\MarkDown’,
6 => ‘OC\Preview\MP3’,
7 => ‘OC\Preview\TXT’,
8 => ‘OC\Preview\Illustrator’,
9 => ‘OC\Preview\Movie’,
10 => ‘OC\Preview\MSOffice2003’,
11 => ‘OC\Preview\MSOffice2007’,
12 => ‘OC\Preview\MSOfficeDoc’,
13 => ‘OC\Preview\OpenDocument’,
14 => ‘OC\Preview\PDF’,
15 => ‘OC\Preview\Photoshop’,
16 => ‘OC\Preview\Postscript’,
17 => ‘OC\Preview\StarOffice’,
18 => ‘OC\Preview\SVG’,
19 => ‘OC\Preview\TIFF’,
20 => ‘OC\Preview\Font’,
),
‘mail_from_address’ => ‘cloud’,
‘mail_smtpmode’ => ‘php’,
‘mail_domain’ => ‘mydomain.com’,
‘loglevel’ => 2,
‘maintenance’ => false,
‘theme’ => ‘’,
‘updater.secret’ => ‘********’,
);

The output of your Apache/nginx/system log in /var/log/____:

The only errors I can find are in the maillog:

Mar 30 16:15:01 nextcloudsrv sendmail[2421]: w2ULF024002421: from=www, size=395, class=0, nrcpts=1, msgid=201803302115.w2ULF024002421@localhost.localdomain, relay=www@localhost
Mar 30 16:15:01 nextcloudsrv sendmail[2421]: w2ULF024002421: to=www, ctladdr=www (80/80), delay=00:00:01, xdelay=00:00:00, mailer=relay, pri=30395, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection refused by [127.0.0.1]

If anyone else has this problem, my issue was extra included ini file was loading this module a second time. I didn’t see it the first several times I looked at it, but as soon as I removed it, the log messages stopped. I have no idea where it could have come from, but it’s all good now.