Akonadi: Difference between revisions

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{{Template:I18n/Language Navigation Bar|Akonadi}}
<languages />
<translate>


==Introduction==
==Introduction== <!--T:1-->
This page is mainly concerned with troubleshooting Akonadi, as there are inevitable glitches in early stages of migration.  For many people the first signs of Akonadi activity will be in KDE SC 4.4, and many will be confused by it.  For a brief description of the purpose of Akonadi, see [[Glossary#Akonadi|this Glossary entry]].  You will also find useful links to further reading.  Once the inevitable teething troubles are over Akonadi will provide a power-house usable by many applications.


===Understanding the Structure===
<!--T:2-->
You can, of course, simply use Kontact to manage all your addressbook, but if you have a backup system in place, for instance, you'll want to know where your data is, and how it's handled. The page [[Akonadi_and_AddressBook]] will help.
The '''Akonadi''' framework is responsible for providing applications with a centralized database to store, index and retrieve the user's personal information. This includes the user's emails, contacts, calendars, events, journals, alarms, notes, etc. In SC 4.4, [[Special:myLanguage/KAddressBook|KAddressBook]] became the first application to start using the '''Akonadi''' framework. In SC 4.7,  
[[Special:myLanguage/KMail|KMail]], [[Special:myLanguage/KOrganizer|KOrganizer]], [[Special:myLanguage/KJots|KJots]], etc. were updated to use '''Akonadi''' as well. In addition, several [[Special:myLanguage/Plasma|Plasma]] widgets also use '''Akonadi''' to store and retrieve calendar events, notes, etc.


== Troubleshooting Tips ==
<!--T:12-->
* When reporting problems with the Akonadi server, always include the comprehensive self-test report. This report can be obtained from the self-test dialog which shows up whenever the Akonadi server was unable to start successfully. You can find the selftest dialog in the kcmmodule that is accessable via 'kcmshell4 kcm_akonadi'.
At the time of writing (August, 2011), the following applications are enabled to use the '''Akonadi''' framework to centrally store and access user data. Follow through to each application's page to learn more.


* Starting the Akonadi server manually on the command line can result in additional useful information. This can be done by running '''akonadictl start''' on a console. Similar, with '''akonadictl stop''' the Akonadi server can be stopped again.  '''akonadictl status''' gives more useful information.
</translate><span id="ApplicationTable"></span><translate>
 
</translate>
==Common Problems==
:{|
 
{{AppItem|KMail|<translate>
===Kontact doesn't start - and doesn't tell me anything===
<!--T:37-->
If Kontact doesn't start, and you see no error messages, check that Akonadi is running.  Akonadi should start on demand, but currently (January 2010) it doesn't.  You have to start it before Kontact will start up if you have any migrated resources (most likely KAddressBook).  Use the AkonadiTray icon to start it.
View-pim-mail.png|
 
KMail</translate>}}<translate><!--T:38-->
===Kontact doesn't start - version II===
Mail Client
Kontact has been known to be hit after an update.  If this happens, try starting KMail, KOrganizer or any of the other applications from KRunner (or Konsole).  Chances are high that they will work as stand-alone apps while you find what went wrong.
Uses '''Akonadi''' to store emails
 
</translate>
===Folder not found: "/Local"===
Many people have reported this error, when Kontact would not start.  There seems to be a bug in the migration that is telling KMail to look for local mail in /home/anne/.local/share/Local, a directory that had not been set up.  The cure for this is not to attempt to correct it, but, with KMail/Kontact closed, to open the Akonadi Console (user krunner, Alt-F2, or 'akonadiconsole' in konsole), and remove the resource that it says is for local mail.  You should now find that you can start Kontact or KMail, and that a new resource will be created, pointing to /home/anne/.local/share/local-mail
 
===There are other new folders under ~/.local/share/===
Yes.  If your addressbook has migrated correctly a new resource will have been created as ~/.local/share/contacts/
 
===What are /usr/bin/akonadi_maildir_resource and /usr/bin/akonadi_maildispatcher_agent?===
 
The akonadi_maildir_resource is created automatically by the akonadi_maildispatcher_agent, while the latter is always started together with the Akonadi server as it provides basic functionality (e.g. sending mail) that is used by all mail applications that are (and will be) based on Akonadi. So it is ok that these two are running, as a user you can simply ignore them.
This autogenerated akonadi_maildir_resource will always point to ~/.local/share/local-mail/ which is your 'Local folders' account where your local folders and emails will be stored.
 
At this point, in KDE SC 4.4, mail is not yet being migrated.
 
===Nepomuk Indexing Agents have been Disabled===
Kontact is now working, but you keep seeing this notice:
 
[[image:NepomukError.png|418px|center]]
 
The most common reason for this notice is that Nepomuk is simply disabled in System Settings. Please try enabling it in System Settings under Advanced / Desktop Search / Basic Settings by checking "Nepomuk Semantik Desktop" and clicking Apply.
 
If this does not help (or if the option was already checked when you got the error) and if you have previously been using prereleases of KDE SC 4.4, you may be affected by a change to the database layout (due to an upgrade of the Virtuoso database server from version 5 to version 6; production releases of KDE SC 4.4 are expected to be shipped with Virtuoso version 6). The following commands should get it working again:
{|style="width:98%; border:2px dotted #BCBCBC; background:#EEEEEE;"
| qdbus org.kde.NepomukServer /nepomukserver org.kde.NepomukServer.quit
|-
|-
| rm -r ~/.kde/share/apps/nepomuk
{{AppItem|KAddressBook|<translate>
<!--T:39-->
View-pim-contacts.png|
KAddressBook</translate>}}<translate><!--T:40-->
Contact Manager
Uses '''Akonadi''' to store contact information
</translate>
|-
|-
| rm -r ~/.kde4/share/apps/nepomuk
{{AppItem|KOrganizer|<translate>
<!--T:41-->
View-pim-calendar.png|
KOrganizer</translate>}}<translate><!--T:42-->
Personal Organizer
Uses '''Akonadi''' to store calendars, events, journals, etc.
</translate>
|-
|-
| nepomukserver
{{AppItem|KJots|<translate>
|}
<!--T:43-->
Note that the above commands will '''not''' enable Nepomuk permanently if it isn't already enabled, you have to use System Settings for that.
kjots.png|
 
KJots</translate>}}<translate><!--T:44-->
A running Nepomuk is necessary to have a working Akonadi, and thus a working Kontact.
Note Taking Application
However, you can disable the Strigi file indexer, it is not needed for Kontact. Strigi file indexing is used for desktop searching only, which is unrelated to Kontact. Just make sure Nepomuk itself is running correctly for Kontact.
Uses '''Akonadi''' to store notes
 
</translate>
In Kontact, Nepomuk is used for many different things, ranging from displaying upcoming birthdays, over handling free/busy lists to showing a contact photo in the message viewer. If Nepomuk is not running, several different things in Kontact will cease to work. The notice is there to warn you about the reduced functionality. Enabling Nepomuk as described above fixes the problem.
|}<translate>
 
You can check if Nepomuk is correctly running by typing ''akonadictl status''.
 
===I want to use my current Address Book and Organizer - Can I?===
Yes.  When you use the Akonadi Console to add a resource it allows you to choose as Standard Addressbook - point that to your std.vcf should work fine.  Migration does not destroy your old addressbook.  You can continue to use it, though you will lose any benefits that Akonadi can bring.  Alternatively you can have both an Akonadi addressbook and your original one, for a time, if you feel safer that way.
 
===I can't see any details in my Address Book===
At the moment, the cause of this is not identified, but the cure is simple.  Close Kontact, and start KAddressBook as a stand-alone application.  After you close it you will be able to use it within Kontact.  It seems that something is not being triggered when Kontact launches, and I expect this to be identified and fixed soon.
 
===My contacts don't show when I use the Select button in KMail===
Check System Settings > Advanced tab > KDE Resources.  Make sure that your Akonadi controlled address book(s) are listed there - add them if necessary.  At the same time, it's a good idea to make your main Akonadi addressbook, usually called Personal Contacts, is set to be the default.
 
===How do I get my Groupware addressbook back?===
Two solutions: using the old framework or the new one.
 
Old framework: In akonadiconsole, add a "KDE Address Book (traditional)".  The KDE Address Book means you can set up old kresources for Akonadi.  In the configuration of "KDE Address Book (traditional)", you point it to an "IMAP over KMail" KResource and in KMail, the groupware options should be enabled.  This should work for Kolab, eGroupware and similar addressbooks - you will need to check the options to make sure that the correct type is selected.
 
New framework (only tested with kolab): In the akonadi configuration module (run 'kcmshell4 kcm_akonadi' to see it), add an "IMAP E-Mail Server" resource, and set up your mail server name, username and password, then click Auto-Detect. Then add a kolab resource. The next step is to wait for the imap resource to synchronize, this can take quite a long time. The status will appear in the akonadi configuration module. If nothing happens, try restarting akonadiserver. After some time the kolab addressbook(s) should appear in kaddressbook.
 
===You experience long delays when sending mail===
This is accompanied by KMail freezing until the mail is actually dispatched.
 
A bug has been found in the way Nepomuk checks addresses, which can cause huge delays.  This is fixed for SC 4.4.1.  Until that is with us, there is this work-around:
 
Close Kontact or KMail and KAddressbook if you are running
stand-alone apps.  Disable Strigi in SystemSettings.  Stop Nepomuk, delete the
database and restart ''nepomukserver''.  The actual commands you need are (as
user)
 
{|style="width:98%; border:2px dotted #BCBCBC; background:#EEEEEE;"
|qdbus org.kde.NepomukServer /nepomukserver org.kde.NepomukServer.quit
|-
|rm -r ~/.kde/share/apps/nepomuk
|-
|rm -r ~/.kde4/share/apps/nepomuk
|-
|nepomukserver
|}
 
This will, of course, wipe out all the database, including any tags you've
added.  In theory, I understand that it's possible to do a more selective wipe
of the database.  If this matters to you you can find the instructions at
http://techbase.kde.org/Development/Tutorials/Metadata/Nepomuk/TipsAndTricks#Remove_all_Strigi-indexed_data
 
== Some Technical Issues ==
=== Nepomuk ===
Starting with KDE 4.4, it is required that Nepomuk is running in order for Akonadi to work correctly. Akonadi will check this and display an error dialog on startup if this is not the case.
 
Nepomuk only works with the Virtuoso backend.
You can check whether the Nepomuk is running with the correct backend by using the Akonadi self-test dialog, as described above.
 
Although Nepomuk is required to be running, you can still disable Strigi file indexing, which is usually the most resource-intensive part of the Nepomuk framework.
 
=== Apparmor ===
Some distributions using Apparmor have it set up in a way that prevents Akonadi from running its internal database server. This can result in a variety of fuzzy error messages, including but not limited to the following:
* unknown error 255 when running akonadictl
* "DB error: 'Could not open required defaults file: /home/$username/.local/share/akonadi/mysql.conf"
 
You can solve this by running '''aa-complain mysqld''' with root privileges then reload apparmor.
On KUbuntu this is:
sudo aa-complain mysqld
sudo /etc/init.d/apparmor reload
 
Note that you might be using Apparmor even if it does not show up in the process list.
 
Also note that some distributions ship an additional ''mysqld'' binary called ''mysqld-akonadi'' which has AppArmor set up correctly. If that's the case on your system and you see this problem nevertheless, there are two possible reasons:
* Akonadi still uses ''mysqld'' instead of ''mysqld-akonadi''. You can change that in Systemsettings -> Advanced -> Akonadi -> Server configuration.
* AppArmor is not setup correctly for ''mysqld-akonadi'' either. Try running the ''aa-complain'' command noted above with ''mysqld-akonadi'' instead of ''mysqld''.
 
---
 
You will also experience this problem if you are running an encrypted home directory using encryptfs combined with AppArmor as the Akonadi apparmor profile currently does not account for an ecrypted home (common with Ubuntu Jaunty users).  Error messages with include:
* dmesg produces:
      ecryptfs_do_create: Failure to create dentry in lower fs; rc = [-13]
      ecryptfs_create: Failed to create file inlower filesystem
* Akonadi will list the following errors:
      Akonadi server process not registered at D-Bus
 
The fix is to edit the following file "/etc/apparmor.d/usr.sbin.mysqld-akonadi".
Below the line:
      @{HOME}/.local/share/akonadi/** rwk,
Add a new line:
      @{HOME}/.Private/** rwk,
 
Restart apparmor and restart akonadi.
 


=== Missing Prerequisite ===
To use Akonadi you need to have the following packages installed (names might differ depending on your distribution):


* The MySQL server (called ''mysql'' on OpenSuse)
<!--T:14-->
* The Qt4 MySQL plugin (called ''libqt4-sql-mysql'' on OpenSuse)
In addition to this, plasma widgets like the '''Digital Clock''' widget, the '''Notes''' widget also use '''Akonadi''' to store and retrieve events and notes.


If you compile Qt4 yourself, make sure to tell the ''configure'' script to build in MySQL support by passing it the '-plugin-sql-mysql' option.  If ''configure'' cannot locate the necessary MySQL client code (i.e, says "MySQL support cannot be enabled due to functionality tests") then ensure that the corresponding package is installed (typically called ''[lib]mysql[client]-dev[el]''). Also, depending on the install location of the MySQL headers, additional parameters to ''configure'' might be needed (eg. ''-I /usr/include/mysql'' on OpenSuse).
==Controlling the Akonadi server== <!--T:15-->


If you get the Qt4 direct from Nokia, such as a download of
<!--T:59-->
  qt-sdk-linux-x86_64-opensource-2009.05.bin
The '''Akonadi''' control module started by the context menu of the '''Akonadi''' tray icon provides an easy means to starting, stopping, restarting and querying the status of the '''Akonadi''' server.  You may also accomplish this from the commandline using the command <code>akonadictl</code>. Using this method, you can get additional useful information on the console.


you will ( by the command "akonadictl start") get an error at Test 1:
<!--T:17-->
  ''Database driver not found.''
To start the '''Akonadi''' server,
  ''Details: The QtSQL driver 'QMYSQL' is required by your current Akonadi server configuration.''
  ''The following drivers are installed: QSQLITE.''
  ''Make sure the required driver is installed.''


The driver you need is ''libqsqlmysql.so''
<!--T:18-->
{{Input|1=akonadictl start}}


Unfortunately this driver is not part of the distribution (until january 2010).
<!--T:19-->
You need to compile the source. Download it
To stop the '''Akonadi''' server,
  qt-everywhere-opensource-src-4.6.0.tar.bz


''configure'' and ''make'' as above. But the ''make install'' doesn't copy the driver. So you have to copy it by yourself:
<!--T:20-->
  ''cp <qt-src-dir>/qt-everywhere-opensource-src-4.6.0/plugins/sqldrivers/libqsqlmysql.so /usr/local/bin/sqldrivers/ ''
{{Input|1=akonadictl stop}}


'''But''' the Revision '''4.6.1''', such as qt-sdk-linux-x86_64-opensource-2010.xx.bin
<!--T:21-->
has the driver you needed.
To restart a running '''Akonadi''' server,
=== Environment Setup ===
The Akonadi server searches for Akonadi agents and resources in the paths defined in the '''XDG_DATA_DIRS''' environment variable. If Akonadi complains about not finding agents or resources, check if this variable is set correctly. Also keep in mind that even if set in a current console session, it might not have been set when starting the server. Starting the server manually in the current console session excludes this cause.


=== mysqld: unknown variable 'innodb_file_per_table=1' ===
<!--T:22-->
{{Input|1=akonadictl restart}}


If the MySQL server log contains the following error:
<!--T:23-->
<code>
To query the status of the '''Akonadi''' server,
[ERROR] /usr/libexec/mysqld: unknown variable 'innodb_file_per_table=1'
[ERROR] Aborting</code>


then your MySQL server was built without the InnoDB support which is required by Akonadi.
<!--T:24-->
{{Input|1=akonadictl status}}


===Disabling the Akonadi subsystem=== <!--T:56-->


===Table 'mysql. servers' doesn't exist===
<!--T:57-->
If MySQL server log contains the following error:
The '''Akonadi''' server is started by any '''Akonadi'''-enabled application. If you don't want Akonadi to be started after login, you have to ensure that no '''Akonadi'''-enabled application is launched at login or thereafter. Remember to check '''Plasma''' widgets as well — the '''Digital Clock''' widget in the default panel, for instance uses '''Akonadi''' to (optionally) display calendar events and this is enabled in its settings by default (see the "Display Events" option) .  You must remove any widgets that may start it from your start-up, if you wish Akonadi to start only when you start '''KMail''' or other applications.
<code>[ERROR] Can't open and lock privilege tables: Table 'mysql.servers' doesn't exist
[ERROR] Cannot open mysql.db
[ERROR] Cannot open mysql.user
[ERROR] Cannot open mysql.event</code>
then, most probably, you don't have your MySQL configuration file in place. Copy it from ''/usr/share/config/akonadi/mysql-global.conf'' into ''~/.config/akonadi/mysql-local.conf''. (For debian and openSuSE users the file ist located in ''/etc/akonadi/mysql-global.conf''). Then open it and uncomment the line '''sql_mode=strict_trans_tables'''. If, after that, you get the following errors:
<code>[ERROR] Plugin 'InnoDB' init function returned error.
[ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE
failed.
[ERROR] Unknown/unsupported table type: innodb
[ERROR] Aborting</code>
then in the same file find the line that starts just like the one above (which you have uncommented), but has additional parameters, separated by commas (something like '''sql_mode=strict_trans_tables,strict_all_tables, ...etc'''). Comment the shorter ''sql_mode=...'' line and uncomment the longer one.


On openSUSE 11.2 running the command
<code>mysql_install_db --datadir=$HOME/.local/share/akonadi/db_data/</code>
will fix this problem.


=== Can't initialize character set latin1 ===
<!--T:26-->
If you get the following error when starting Akonadi:
{{Remember|1=If you don't want to have '''Akonadi''' running on your system at all, you can not use any of the '''Akonadi'''-enabled applications. Such applications will not work when '''Akonadi''' is disabled using the steps below. See the list of [[Special:myLanguage/Akonadi#ApplicationTable|Akonadi-enabled applications]]. Also note, that some '''Plasma''' widgets, such as the '''Digital Clock''' uses '''Akonadi'''.}}


<code>Character set 'latin1' is not a compiled character set and is not specified in
<!--T:27-->
the '/usr/share/mysql/charsets/Index.xml' file
The '''Akonadi''' server is launched automatically at login whenever any '''Akonadi'''-enabled application requests access to it.
Nepomuk QueryServer interface not available!
Connecting to deprecated signal
QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
DataStore::unhideAllPimItems()
Character set 'latin1' is not a compiled character set and is not specified in
the '/usr/share/mysql/charsets/Index.xml' file
Database error: Cannot open database.
Last driver error: "QMYSQL: Unable to connect"
Last database error: "Can't initialize character set latin1 (path:
/usr/share/mysql/charsets/)"
Database error: Cannot open database.
Last driver error: "QMYSQL: Unable to connect"
Last database error: "Can't initialize character set latin1 (path:
/usr/share/mysql/charsets/)"</code>


then you're probably using a MySQL server which has a version > 5.1.42.
<!--T:28-->
There is a known regression in MySQL 5.1.43 and 5.1.44 which prevents MySQL from starting.
To disable the '''Akonadi''' subsystem, shut down the running Akonadi server from the control module or the command line:


See http://bugs.kde.org/226960 for more details.
<!--T:29-->
{{Input|1=akonadictl stop}}


<!--T:58-->
To ensure that Akonadi is not started, check that no applications require it at login. In particular, open the Plasma clock applet preferences, go to <menuchoice>Calendar</menuchoice> and uncheck <menuchoice>Show events</menuchoice> to prevent Plasma from requesting information from Akonadi and thus allowing it to start.


=== Restarting after a previous error ===
==Frequently Asked Questions== <!--T:34-->
If you had problems starting Akonadi and fixed those (such as a missing package or the Apparmor problem) make sure that the Akonadi server is completely shut down before trying to start it again, by calling '''akonadictl stop''' on the command line. You can confirm that it was indeed shut down completely by running '''akonadictl status'''.


Under some circumstances the Akonadi server can be stuck in a partially running state after a failure which will prevent the next attempt to start it to fail as well. Please file a bug report if you run into this problem including the self-test report of the initial problem.
=== Where is my data now? === <!--T:45-->


=== The so-called "Gentoo-Assert" ===
<!--T:46-->
That's an especially nasty problem that so far only affects users of source-based distributions, most prominently Gentoo. It is named after MySQL assertions like the following example and is most likely caused by a MySQL protocol mismatch between the MySQL server and the client library or the Qt MySQL driver.
A full explanation of where the data is stored and Akonadi's interaction with it is available in [http://blogs.kde.org/node/4503 Andras Mantia's blog]


<code>
=== How to upgrade my PostgreSQL database? === <!--T:60-->
akonadiserver: libmysql.c:4301: setup_one_fetch_function: Assertion `param->buffer_length != 0' failed.
</code>


It is extremely hard to diagnose as the assertion mentioned above are only triggered sometimes. Instead you'll get a wide range of weird symptoms:
<!--T:61-->
* ASAP protocol logs show successful creation of objects which are supposedly no longer available when the next commands accesses them again.
After updating your PostgreSQL server to a new major version, sometimes you will have to convert your Akonadi database for use with this new version. Instructions can be found on [[Special:myLanguage/Akonadi/Postgres_update|this page]].
* SQL protocol logs show INSERT or UPDATE commands with values that mismatch the corresponding column types and nevertheless succeed.
* SQL protocol logs showing large apparently random record ids which are nevertheless considered valid.


References:
=== Migration problems === <!--T:47-->
* http://forum.kde.org/viewtopic.php?f=20&t=61738
* http://bugs.gentoo.org/show_bug.cgi?id=267513
* https://bugs.kde.org/202623 (contains a possible solution)
* http://bbs.archlinux.org/viewtopic.php?id=78358


Possible solution: Rebuild the Qt MySQL driver after upgrading MySQL (which most likely caused this problem in the first place).
<!--T:35-->
'''Akonadi's''' [[Special:myLanguage/Glossary#Akonadi|Glossary entry]] has a brief description of Akonadi's purpose, and other useful links. [[Special:myLanguage/Akonadi_and_AddressBook|This page]] explains how '''Akonadi''' and '''KAddressBook''' work together.


<!--T:9-->
[[Category:System]]
[[Category:System]]
</translate>

Latest revision as of 22:37, 29 December 2020

Other languages:

Introduction

The Akonadi framework is responsible for providing applications with a centralized database to store, index and retrieve the user's personal information. This includes the user's emails, contacts, calendars, events, journals, alarms, notes, etc. In SC 4.4, KAddressBook became the first application to start using the Akonadi framework. In SC 4.7, KMail, KOrganizer, KJots, etc. were updated to use Akonadi as well. In addition, several Plasma widgets also use Akonadi to store and retrieve calendar events, notes, etc.

At the time of writing (August, 2011), the following applications are enabled to use the Akonadi framework to centrally store and access user data. Follow through to each application's page to learn more.

KMail

Mail Client

Uses Akonadi to store emails

KAddressBook

Contact Manager

Uses Akonadi to store contact information

KOrganizer

Personal Organizer

Uses Akonadi to store calendars, events, journals, etc.

KJots

Note Taking Application

Uses Akonadi to store notes

In addition to this, plasma widgets like the Digital Clock widget, the Notes widget also use Akonadi to store and retrieve events and notes.

Controlling the Akonadi server

The Akonadi control module started by the context menu of the Akonadi tray icon provides an easy means to starting, stopping, restarting and querying the status of the Akonadi server. You may also accomplish this from the commandline using the command akonadictl. Using this method, you can get additional useful information on the console.

To start the Akonadi server, 

akonadictl start

To stop the Akonadi server, 

akonadictl stop

To restart a running Akonadi server, 

akonadictl restart

To query the status of the Akonadi server, 

akonadictl status

Disabling the Akonadi subsystem

The Akonadi server is started by any Akonadi-enabled application. If you don't want Akonadi to be started after login, you have to ensure that no Akonadi-enabled application is launched at login or thereafter. Remember to check Plasma widgets as well — the Digital Clock widget in the default panel, for instance uses Akonadi to (optionally) display calendar events and this is enabled in its settings by default (see the "Display Events" option) . You must remove any widgets that may start it from your start-up, if you wish Akonadi to start only when you start KMail or other applications.


Remember
If you don't want to have Akonadi running on your system at all, you can not use any of the Akonadi-enabled applications. Such applications will not work when Akonadi is disabled using the steps below. See the list of Akonadi-enabled applications. Also note, that some Plasma widgets, such as the Digital Clock uses Akonadi.


The Akonadi server is launched automatically at login whenever any Akonadi-enabled application requests access to it.

To disable the Akonadi subsystem, shut down the running Akonadi server from the control module or the command line: 

akonadictl stop

To ensure that Akonadi is not started, check that no applications require it at login. In particular, open the Plasma clock applet preferences, go to Calendar and uncheck Show events to prevent Plasma from requesting information from Akonadi and thus allowing it to start.

Frequently Asked Questions

Where is my data now?

A full explanation of where the data is stored and Akonadi's interaction with it is available in Andras Mantia's blog

How to upgrade my PostgreSQL database?

After updating your PostgreSQL server to a new major version, sometimes you will have to convert your Akonadi database for use with this new version. Instructions can be found on this page.

Migration problems

Akonadi's Glossary entry has a brief description of Akonadi's purpose, and other useful links. This page explains how Akonadi and KAddressBook work together.

Retrieved from "https://wikisandbox.kde.org/index.php?title=Akonadi&oldid=462121"