mediawiki DBLoadBalancer error while setting up wiki

0
votes

I've just installed MediaWiki 1.28 on arch linux with nginx 1.10.3, php 7.1.1, php-fpm, and sqlite 3.16.2. I followed the arch wiki guide: https://wiki.archlinux.org/index.php/MediaWiki. I've installed the required PHP extensions and PHP, sqlite, nginx all seem to run fine on their own.

Now when I'm trying to do the setting up LocalSettings.php part of the MediaWiki installation, I go to 0.0.0.0/mediawiki in the browser, click the setup and get the error below. Maybe it's a setting for sqlite that has to be enabled?

[1449c8c65e65734059748f4e] /mw-config/index.php MediaWiki\Services\ServiceDisabledException from line 340 of /usr/share/webapps/mediawiki/includes/services/ServiceContainer.php: Service disabled: DBLoadBalancer

Backtrace:

#0 /usr/share/webapps/mediawiki/includes/MediaWikiServices.php(509): MediaWiki\Services\ServiceContainer->getService(string)
#1 /usr/share/webapps/mediawiki/includes/GlobalFunctions.php(3089): MediaWiki\MediaWikiServices->getDBLoadBalancer()
#2 /usr/share/webapps/mediawiki/includes/GlobalFunctions.php(3075): wfGetLB(boolean)
#3 /usr/share/webapps/mediawiki/includes/cache/LinkCache.php(267): wfGetDB(integer)
#4 /usr/share/webapps/mediawiki/includes/Title.php(3184): LinkCache->addLinkObj(Title)
#5 /usr/share/webapps/mediawiki/includes/Title.php(934): Title->getArticleID(integer)
#6 /usr/share/webapps/mediawiki/includes/content/ContentHandler.php(282): Title->getContentModel()
#7 /usr/share/webapps/mediawiki/includes/Title.php(4684): ContentHandler::getForTitle(Title)
#8 /usr/share/webapps/mediawiki/includes/parser/Parser.php(867): Title->getPageLanguage()
#9 /usr/share/webapps/mediawiki/includes/parser/Parser.php(2110): Parser->getTargetLanguage()
#10 /usr/share/webapps/mediawiki/includes/parser/Parser.php(2075): Parser->replaceInternalLinks2(string)
#11 /usr/share/webapps/mediawiki/includes/parser/Parser.php(1290): Parser->replaceInternalLinks(string)
#12 /usr/share/webapps/mediawiki/includes/parser/Parser.php(441): Parser->internalParse(string)
#13 /usr/share/webapps/mediawiki/includes/installer/Installer.php(675): Parser->parse(string, Title, ParserOptions, boolean)
#14 /usr/share/webapps/mediawiki/includes/installer/WebInstaller.php(681): Installer->parse(string, boolean)
#15 /usr/share/webapps/mediawiki/includes/installer/WebInstaller.php(657): WebInstaller->getInfoBox(string, string, string)
#16 /usr/share/webapps/mediawiki/includes/installer/WebInstaller.php(401): WebInstaller->getErrorBox(string)
#17 /usr/share/webapps/mediawiki/mw-config/index.php(54): WebInstaller->showError(Message, string)
#18 /usr/share/webapps/mediawiki/mw-config/index.php(38): wfInstallerMain()
#19 {main}
2
mediawiki
Recently I encountered exactly the same issue, unfortunately I can't remember how exactly it was solved. It's definitely related to missing system component or even wrong directory permissions. Following error log it seems that WebInstaller fails at starting a PHP session for your request and ServiceDisabledException is just an additional error. See /index.php line 54 - wakalaka

2 Answers

0
votes

The problem was I had my php/sessions directory in /tmp. I moved it to session.save_path = "/var/lib/php/sessions" in php.ini and repeated these steps:

mkdir -p /var/lib/php/sessions
chown http:http /var/lib/php/sessions
chmod go-rwx /var/lib/php/sessions
0
votes

Regardless of what Tgr said above, fixing the sessions did fix the issue for me. I'm using Apache ITK so the resolution I use is slightly different since each virtual host runs under its own unique uid.

First I create a separate directory for the sessions and change ownership

mkdir /var/lib/php/sessions-wiki
chown wiki. /var/lib/php/sessions-wiki

Then in my VirtualHosts directive I tell Apache/php where to find the session files by adding

php_admin_value session.save_path "/var/lib/php/sessions-wiki"

Then to make sure your config didn't break it.

apachectl configtest

Finally reload your config

apachectl graceful