====== The TaskRunner Process ======

DokuWiki uses a background process triggered by a [[wp>Web beacon|webbug]] to execute administrative tasks like building the [[search]] index, creating a [[sitemap]] or updating [[metadata]].

The task runner is located in ''lib/exe/taskrunner.php'' and is included as hidden image by the ''tpl_indexerWebBug()'' function.

For more info about the technique used see [[https://www.sitepoint.com/web-bugs-for-job-scheduling-hack-or-solution/|Web bugs for job scheduling]]

Note: this mechanism used to be called "indexer" because it was implemented for the search index first. Over time it took care of more tasks and thus was renamed.

===== Debugging =====

If you have problems with the indexer or the services it should provide, you can get some debugging output, by enabling the [[config:allowdebug]] option, calling it directly and appending the parameter ''debug=1''.

Example: ''%%http://example.com/dokuwiki/lib/exe/taskrunner.php?id=start&debug=1%%''