6. Troubleshooting#

When you encounter problems with the operation of the OX Connector app, this section provides information where you can look closer into and to get an impression about what’s going wrong.

6.1. Log files#

The OX Connector app produces different logging information in different places.

Listener Converter: /var/log/univention/listener_modules/ox-connector.log

Contains log information from the Listener Converter about create, update and delete actions of objects.

It also shows warnings and errors when the OX Connector configuration isn’t correct, or the connector can’t establish a connection to the SOAP API.

App Center: /var/log/univention/appcenter.log

Contains log information around activities in the App Center.

The App Center writes OX Connector relevant information to this file, when you run app lifecycle tasks like install, update and uninstall or when you change the app settings.

Domain join: /var/log/univention/join.log

Contains log information from the join processes. When the App Center install OX Connector, the app also joins the domain.

6.2. Health check#

First, have a look at the log file for the Listener Converter and look for warnings and errors, see Log files.

The OX Connector has a good health when the number of files for provisioning for the Listener and the Listener Converter is low. For a quick verification, run the following command on the UCS system with the OX Connector installed:

Listing 6.1 Verify the number of unprocessed files for the Listener.#
$ DIR_LISTENER="/var/lib/univention-appcenter/listener/ox-connector"
$ ls -1 "$DIR_LISTENER"/*.json 2> /dev/null | wc -l
0
Listing 6.2 Verify the number of unprocessed files for the Listener Converter.#
$ DIR_CONVERTER="/var/lib/univention-appcenter/apps/ox-connector/data/listener"
$ ls -1 "$DIR_CONVERTER"/*.json 2> /dev/null | wc -l
0

The Listener Converter logs consecutive errors in the log file, for example:

INFO    This is consecutive error #{some number}

Such entries indicate that the provisioning has issues with processing the queue. For more information, see Queuing.

6.3. Provisioning stops working#

When the provisioning stopped working, a previous change in UDM is a probable reason and the OX Connector doesn’t know how to proceed. The connector retries the action over and over again until an administrator repairs the cause manually.

First, see the Log files and look for warnings and errors. If it’s not a temporary problem like for example network connectivity, the fix requires manual action.

As a last resort, the administrator can delete the flawed file. The log file reveals the flawed file and its path, see Delete one item from the queue.

6.4. Queuing#

The queue for provisioning consists of JSON files. How the connector works describes the connector’s data processing. Administrators can manually intervene with the queue in the following cases.

6.4.1. Delete one item from the queue#

Administrators can remove an item in the queue, if the connector can’t process it and interrupts the provisioning process. The connector retries to provision this item and continually fails.

To find and remove the problematic item from the queue, follow these steps:

  1. Open the log file of the Listener Converter. For the log file location, see Log files.

  2. Find the filename of the item that the Listener Converter retries to provision. For example, the log file shows:

    Error while processing /var/lib/univention-appcenter/apps/ox-connector/data/listener/$timestamp.json

    $timestamp has the format %Y-%m-%d-%H-%M-%S.

  3. Remove the problematic item:

    $ rm /var/lib/univention-appcenter/apps/ox-connector/data/listener/$timestamp.json

6.4.2. Re-provision one specific UDM object#

The OX Connector allows to re-provision one UDM object to OX App Suite. The following snippet provisions one user object:

Listing 6.3 Re-provision one UDM object#
DN="uid=user100,cn=users,$(ucr get ldap/base)"
ENTRY_UUID="$(univention-ldapsearch -b "$DN" + | grep entryUUID | awk '{ print $2 }')"
cat > /var/lib/univention-appcenter/listener/ox-connector/$(date +%Y-%m-%d-%H-%M-%S).json <<- EOF
{
    "entry_uuid": "$ENTRY_UUID",
    "dn": "$DN",
    "object_type": "users/user",
    "command": "modify"
}
EOF

6.4.3. Re-provision all data#

Warning

Depending on the number of users and groups in the UCS LDAP directory, this task may take a lot of time.

Reprovisioning all data isn’t recommended.

The following command reads all UDM objects from the UCS LDAP directory and adds them to the provisioning queue:

Listing 6.4 Re-provisioning all UDM objects to OX App Suite#
$ univention-directory-listener-ctrl resync ox-connector

The re-provisioning won’t run any delete operations, because the Listener only adds existing UDM objects to the queue.

Caution

The OX Connector may decide to delete objects based on data in the JSON files. For example isOxGroup = Not in a group object.

6.5. Rebuild cache#

The internal ID of objects in the database of OX App Suite can become corrupted, for example after a backup restore of the database. For more information about the cache, see Cache.

To rebuild the cache, run the following commands:

Listing 6.5 Rebuild cache for internal ID#
$ univention-app shell ox-connector
/oxp # update-ox-db-cache --delete
/oxp # update-ox-db-cache

Changed in version 2.0.0: Rebuild the cache after an update to version 2.0.0, because previous versions didn’t maintain the cache for the internal ID.

Otherwise, the OX Connector app falls back into the much slower mechanism and runs a database query per user during the provisioning.

Tip

Retrieve all users per context in one request

Rebuilding the cache may take a long time and depends on the amount of users in the OX App Suite database.

update-ox-db-cache --build-cache can speed up the rebuild, because it retrieves all users of a context with one request.

Warning

Memory consumption

On the UCS system with the OX Connector, the rebuild process may use up to 1 GB memory per 10,000 users in the database for OX App Suite.

System load

Furthermore, the process may generate a lot of load on the OX App Suite system and the OX Connector app.

6.6. Collect information for support ticket#

Before you open a support ticket, make sure to collect and provide relevant details about your case, so that the Univention Support team can help you: