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==========================
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Issues and Troubleshooting
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==========================
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If you have trouble installing, configuring or maintaining ownCloud, please
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refer to our community support channels:
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* `The ownCloud Forums`_
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.. note:: The ownCloud forums have a `FAQ page`_ where each topic corresponds
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to typical mistakes or frequently occurring issues
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* `The ownCloud User mailing list`_
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* The ownCloud IRC chat channel ``irc://#owncloud@freenode.net`` on
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freenode.net, also accessible via `webchat`_
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Please understand that all these channels essentially consist of users like you
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helping each other out. Consider helping others out where you can, to
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contribute
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back for the help you get. This is the only way to keep a community like
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ownCloud healthy and sustainable!
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If you are using ownCloud in a business or otherwise large scale deployment,
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note that ownCloud Inc. offers the `Enterprise Subscription`_ with commercial
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support options.
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Bugs
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----
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If you think you have found a bug in ownCloud, please:
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* Search for a solution (see the options above)
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* Double-check your configuration
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If you can't find a solution, please use our `bugtracker`_.
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.. _the ownCloud Forums: http://forum.owncloud.org
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.. _FAQ page: https://forum.owncloud.org/viewforum.php?f=17
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.. _the ownCloud User mailing list:
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https://mailman.owncloud.org/mailman/listinfo/user
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.. _webchat: http://webchat.freenode.net/?channels=owncloud
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.. _Enterprise Subscription: https://owncloud.com/lp/community-or-enterprise/
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.. _bugtracker:
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http://doc.owncloud.org/server/9.0/developer_manual/bugtracker/index.html
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.. TODO ON RELEASE: Update version number above on release
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General Troubleshooting
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-----------------------
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ownCloud Logfiles
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^^^^^^^^^^^^^^^^^
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In a standard ownCloud installation the log level is set to ``Normal``. To find
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any issues you need to raise the log level to ``All`` in your ``config.php``
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file, or to **Everything** on your ownCloud Admin page. Please see
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:doc:`../configuration_server/logging_configuration` for more information on
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these log levels.
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Some logging - for example JavaScript console logging - needs manually editing
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the configuration file. Edit :file:`config/config.php` and add
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``define('DEBUG',
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true);``::
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<?php
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define('DEBUG',true);
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$CONFIG = array (
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... configuration goes here ...
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);
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For JavaScript issues you will also need to view the javascript console. All
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major browsers have developer tools for viewing the console, and you
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usually access them by pressing F12. For Firefox we recommend to installing
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the `Firebug extension <https://getfirebug.com/>`_.
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.. note:: The logfile of ownCloud is located in the data directory
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``owncloud/data/owncloud.log``.
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.. _label-phpinfo:
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PHP Version and Information
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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You will need to know your PHP version and configurations. To do this, create a
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plain-text file named **phpinfo.php** and place it in your Web root, for
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example ``/var/www/html/phpinfo.php``. (Your Web root may be in a different
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location; your Linux distribution documentation will tell you where.) This file
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contains just this line::
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<?php phpinfo(); ?>
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Open this file in a Web browser by pointing your browser to
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``localhost/phpinfo.php``:
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.. figure:: ../images/phpinfo.png
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Your PHP version is at the top, and the rest of the page contains abundant
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system information such as active modules, active `.ini` files, and much more.
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When you are finished reviewing your information you must delete
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``phpinfo.php``, or move it outside of your Web directory, because it is a
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security risk to expose such sensitive data.
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Debugging Sync Issues
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^^^^^^^^^^^^^^^^^^^^^
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.. note:: The data directory on the server is exclusive to ownCloud and must
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not be modified manually.
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Disregarding this can lead to unwanted behaviours like:
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* Problems with sync clients
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* Undetected changes due to caching in the database
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If you need to directly upload files from the same server please use a WebDAV
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command line client like ``cadaver`` to upload files to the WebDAV interface at:
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https://example.org/owncloud/remote.php/webdav
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Common problems / error messages
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Some common problems / error messages found in your logfiles as described above:
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* ``SQLSTATE[HY000] [1040] Too many connections`` -> You need to increase the
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connection limit of your database, please refer to the manual of your database
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for more information.
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* ``SQLSTATE[HY000]: General error: 5 database is locked`` -> You're using
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``SQLite``
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which can't handle a lot of parallel requests. Please consider converting to
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another database like described in
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:doc:`../configuration_database/db_conversion`.
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* ``SQLSTATE[HY000]: General error: 2006 MySQL server has gone away`` -> The
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database request takes too long and therefore the MySQL server times out. Its
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also possible that the server is dropping a packet that is too large. Please
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refer to the manual of your database for how to raise the config options
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``wait_timeout`` and/or ``max_allowed_packet``.
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* ``SQLSTATE[HY000] [2002] No such file or directory`` -> There is a problem
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accessing your SQLite database file in your data directory
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(``data/owncloud.db``). Please check the permissions of this folder/file or
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if it exists at all. If you're using MySQL please start your database.
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* ``Connection closed / Operation cancelled`` -> This could be caused by wrong
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``KeepAlive`` settings within your Apache config. Make sure that
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``KeepAlive`` is set to ``On`` and also try to raise the limits of
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``KeepAliveTimeout`` and ``MaxKeepAliveRequests``.
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* ``No basic authentication headers were found`` -> This error is shown in your
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``data/owncloud.log`` file. Some Apache modules like ``mod_fastcgi``, ``mod_fcgid``
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or ``mod_proxy_fcgi`` are not passing the needed authentication headers to
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PHP and so the login to ownCloud via WebDAV, CalDAV and CardDAV clients is
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failing. Information on how to correctly configure your environment can be
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found at the `forums <https://forum.owncloud.org/viewtopic.php?f=17&t=30646>`_.
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Troubleshooting Webserver and PHP problems
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------------------------------------------
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Logfiles
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^^^^^^^^
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When having issues the first step is to check the logfiles provided by PHP, the
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Webserver and ownCloud itself.
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.. note:: In the following the paths to the logfiles of a default Debian
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installation running Apache2 with mod_php is assumed. On other webservers,
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Linux distros or operating systems they can differ.
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* The logfile of Apache2 is located in ``/var/log/apache2/error.log``.
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* The logfile of PHP can be configured in your ``/etc/php5/apache2/php.ini``.
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You need to set the directive ``log_errors`` to ``On`` and choose the path
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to store the logfile in the ``error_log`` directive. After those changes you
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need to restart your Webserver.
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* The logfile of ownCloud is located in the data directory
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``/var/www/owncloud/data/owncloud.log``.
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Webserver and PHP modules
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^^^^^^^^^^^^^^^^^^^^^^^^^
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.. note:: Lighttpd is not supported with ownCloud, and some ownCloud features
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may not work at all on Lighttpd.
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There are some Webserver or PHP modules which are known to cause various
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problems like broken up-/downloads. The following shows a draft overview of
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these modules:
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1. Apache
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* mod_pagespeed
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* mod_evasive
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* mod_security
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* mod_reqtimeout
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* mod_deflate
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* libapache2-mod-php5filter (use libapache2-mod-php5 instead)
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* mod_spdy together with libapache2-mod-php5 / mod_php (use fcgi or php-fpm
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instead)
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* mod_dav
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* mod_xsendfile / X-Sendfile (causing broken downloads if not configured
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correctly)
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2. NginX
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* ngx_pagespeed
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* HttpDavModule
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* X-Sendfile (causing broken downloads if not configured correctly)
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3. Mac OS X server
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* mod_auth_apple
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* com.apple.webapp.webdavsharing
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4. PHP
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* eAccelerator
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Troubleshooting WebDAV
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----------------------
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ownCloud uses SabreDAV, and the SabreDAV documentation is comprehensive and
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helpful.
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.. note: Lighttpd is not supported on ownCloud, and Lighttpd WebDAV does not
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work with ownCloud.
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See:
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* `SabreDAV FAQ <http://sabre.io/dav/faq/>`_
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* `Webservers <http://sabre.io/dav/webservers>`_ (Lists lighttpd as not
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recommended)
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* `Working with large files <http://sabre.io/dav/large-files/>`_ (Shows a PHP
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bug in older SabreDAV versions and information for mod_security problems)
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* `0 byte files <http://sabre.io/dav/0bytes>`_ (Reasons for empty files on the
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server)
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* `Clients <http://sabre.io/dav/clients/>`_ (A comprehensive list of WebDAV
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clients, and possible problems with each one)
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* `Finder, OS X's built-in WebDAV client
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<http://sabre.io/dav/clients/finder/>`_
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(Describes problems with Finder on various webservers)
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There is also a well maintained FAQ thread available at the `ownCloud Forums
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<https://forum.owncloud.org/viewtopic.php?f=17&t=7536>`_
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which contains various additional information about WebDAV problems.
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Troubleshooting Contacts & Calendar
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-----------------------------------
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Service discovery
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^^^^^^^^^^^^^^^^^
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Some clients - especially iOS - have problems finding the proper sync URL, even
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when explicitly configured to use it.
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There are several techniques to remedy this, which are described extensively at
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the `Sabre DAV website <http://sabre.io/dav/service-discovery/>`_.
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Apple iOS
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^^^^^^^^^
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Below is what has been proven to work with iOS including iOS 7.
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If your ownCloud instance is installed in a subfolder under the web server's
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document root and the client has difficulties finding the Cal- or CardDAV
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end-points, configure your web server to redirect from a "well-known" URL to
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the
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one used by ownCloud. When using the Apache web server this is easily achieved
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using a :file:`.htaccess` file in the document root of your site.
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Say your instance is located in the ``owncloud`` folder, so the URL to it is
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``ADDRESS/owncloud``, create or edit the :file:`.htaccess` file and add the
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following lines::
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Redirect 301 /.well-known/carddav /owncloud/remote.php/carddav
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Redirect 301 /.well-known/caldav /owncloud/remote.php/caldav
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Now change the URL in the client settings to just use ``ADDRESS`` instead of
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e.g. ``ADDRESS/remote.php/carddav/principals/username``.
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This problem is being discussed in the `forum
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<http://forum.owncloud.org/viewtopic.php?f=3&t=71&p=2211#p2197>`_.
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Unable to update Contacts or Events
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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If you get an error like ``PATCH https://ADDRESS/some_url HTTP/1.0 501 Not
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Implemented`` it is likely caused by one of the following reasons:
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Using Pound reverse-proxy/load balancer
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As of writing this Pound doesn't support the HTTP/1.1 verb.
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Pound is easily `patched
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<http://www.apsis.ch/pound/pound_list/archive/2013/2013-08/1377264673000>`_
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to support HTTP/1.1.
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Other issues
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------------
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Some services like *Cloudflare* can cause issues by minimizing JavaScript
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and loading it only when needed. When having issues like a not working
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login button or creating new users make sure to disable such services
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first. |