YouTrack is always connected to a Hub service. The Hub service supports authentication, authorization, and user management.
When YouTrack is installed as a self-hosted application, you can choose whether to use the Hub service that is built into YouTrack or install and run Hub as an external application. An external Hub installation lets you centralize user management operations for YouTrack and TeamCity installations. It also enables single sign-on and some additional integration features for these applications.
In a YouTrack Server installation that is integrated with an external Hub service, you have access to a dedicated page in YouTrack that lets you troubleshoot and manage the integration.
To access this page, open the Administration menu and select . Scroll to the bottom of the Server Configuration tab and click the link.
At the top of the Hub Integration page, you see a short description of the Hub service itself. You also see a description of the deployment modes that are available for the Hub integration. The description indicates which mode is currently enabled in YouTrack.
The following example shows a YouTrack Server installation that is connected to an external Hub service:
When you migrate from the built-in Hub service to an external Hub, you can use this information to verify whether your migration to an external Hub service was successful.
The Hub Integration page displays a collection of health indicators that you can use to monitor the status of your Hub integration. Use these indicators to diagnose problems with your Hub installation.
Connection to Hub
This indicates whether YouTrack has an active connection to the Hub service. Under normal conditions, the connection status is Active and working.
If your Hub service is down or unresponsive, this metric displays the condition that is the likely source of the problem. Use the following list to resolve the problem:
These messages indicate problems with the installation that require technical support. To ask one of our engineers to repair the Hub integration, submit a support request.
YouTrack isn't trusted in Hub
In most cases, a user has accessed the list of services that are connected to Hub and has distrusted YouTrack. To resolve this problem, access the Services page in Hub and trust the YouTrack service.
Unknown host in Hub URL
The Hub domain name cannot be resolved by your DNS service. Check your network infrastructure or contact your ISP.
Can't connect to Hub
There is a connectivity issue. For details, see Connectivity Issues.
Connection to Hub timed out
Hub is unreachable or has performance issues. For details, see Connectivity Issues.
Hub event sync
This indicator displays the current status of the Hub event sync routine. Under normal conditions, the status is Active, syncing everything.
If the status reads Not started, contact support.
Here you see the current source that is used for access authorization. Under normal conditions, the source is Hub permission management. If the status reads YouTrack permission management, contact support.
This is the URL of your Hub service.
If you experience connectivity issues with an external Hub installation, open this URL on the machine that runs YouTrack to verify that the Hub service is accessible from YouTrack.
YouTrack Service ID
Here you find the ID that is assigned to YouTrack as a connected service in Hub.
When a service is connected to Hub, it is assigned a unique service ID. If you want to connect to YouTrack using the REST API, use this service ID for access and authorization.
If you suspect that your Hub integration is not working as intended, follow the instructions for Troubleshooting.
The Hub Integration page includes a set of tools that you can use to identify and fix problems with the Hub integration. The following operations are available:
For improved performance, there are a number of objects that are stored in both the Hub and YouTrack databases. This includes users and their related records for group membership, licenses, notification settings, and so on. These duplicated data structures are mapped using universally unique identifiers (UUIDs).
A background routine regularly checks both sides of the mapping, eliminating possible data discrepancies. If you experience problems with the connection between YouTrack and Hub, the two databases can be out of sync.
This operation synchronizes records for users and groups, using Hub as the data source.
An export routine regularly locates records that only exist in YouTrack and exports them to the Hub database.
This operation locates orphan entities that have not been exported, assigns them UUIDs, and exports them to Hub.
This operation conducts a range of self-checks that locate broken mappings, identify suspicious data patterns, and diagnose other problems with the Hub integration. If a problem is located, the diagnostics routine offers a quickfix action, when available. Quickfix actions are found in the Integration Log at the bottom of the page.
There is also a routine diagnostics check that runs in the background. If the background routine detects a problem, you will also see suggestions for available quickfixes in the integration log.
Hub provides YouTrack with a remote permission cache. This cache is used to check user permissions in memory without making network calls to Hub.
During Hub outages or similar events, the permission cache may become corrupted. This operation flushes the local permission cache and reloads fresh data from Hub. If you experience unusual behavior related to access permissions in YouTrack, run this operation.
At the bottom of the Hub Integration page, you find a list of recent events that have been written to the integration log.
Check this section of the page for quickfixes. Use quickfixes to resolve problems that are detected by the diagnostics routine.
This section describes the most frequently encountered problems with the Hub integration and the steps you can take to resolve them.
The most obvious indication that there is a problem with your Hub integration is when users are unable to log in. To determine whether YouTrack can establish a connection to the Hub service, check the login form.
If the connection to Hub is active, the Hub login form is displayed.
If the connection is broken, the native YouTrack login form is displayed.
Hub login form, connection is OK
Native login form, no connection to Hub
The Connection to Hub metric on the Hub Integration page displays the current connection status. If any of the following status messages are shown, there is a problem with YouTrack that requires the attention of the support team. To resolve any of these issues, submit a support request.
Empty Hub URL
Malformed Hub URL
Wrong Hub URL
YouTrack is not registered in Hub
YouTrack is registered in Hub, but its service ID and secret do not match
If any of the following conditions are present, follow the instructions provided to investigate and resolve the problem.
Condition — YouTrack cannot establish a connection to the Hub service. The Connection to Hub status reads Can't connect to Hub or Connection to Hub timed out. When you attempt to log in, you see the message Permission management service (Hub) is unavailable.
The Hub service has shut down or is unresponsive.
Verify the condition by accessing the Hub service. If you are unable to establish a connection, restart it.
If the problem persists, submit a support request. For faster processing, attach your
Condition — YouTrack isn't trusted in Hub.
In most cases, a user has accessed the list of services that are connected to Hub and has distrusted YouTrack.
Access the Services page in Hub and trust the YouTrack service.
Condition — Unknown host in Hub URL.
The Hub domain name cannot be resolved by your DNS service.
Check your network infrastructure or contact your ISP.
Hub Event Sync Issues
Under normal conditions, the Hub event sync status is Active, syncing everything. If any of the following conditions are present, follow the instructions provided to investigate and resolve the problem.
Condition — The Hub event sync status reads Not started.
There is a problem with your installation.
Condition — The Hub event sync status reads Initialization error or Incompatible Hub server detected.
There is either a problem with your installation or the Hub version is incompatible with YouTrack.
Check that you are using the most recent release version. If not, upgrade your installations to the latest versions of YouTrack and Hub.
Permission Management Issues
Under normal conditions, the Permission management status is Hub permission management. If the status displays YouTrack permission management, submit a support request.
Broken Data Mappings
Data mapping is a virtual connection between objects that are stored in the YouTrack and Hub databases. For example, each user has two user profiles. For application features to work properly, these profiles must be linked.
Diagnostic routines check all mappings for consistency and offer quick fixes for any problems they encounter.
Condition — Users report problems with access in one or more projects.
There are users who have been added to or removed from groups or other changes that were applied in YouTrack that are not mapped to the Hub database.