Authentication Error on Confluence Links within Jira Cloud
Platform Notice: Cloud Only - This article only applies to Atlassian products on the cloud platform.
Summary
Upon tapping the Authenticate with Confluence to see this page button on a Jira issue, the following error is displayed:
Authentication failed!
An error occurred while trying to obtain an access token. For application link "<Confluence site name> (<Applink-ID>) http://INSTANCE.atlassian.net/wiki confluence"
OAuth Problem Details
realm: 'http://INSTANCE.atlassian.net/wiki'
oauth_problem: 'consumer_key_rejected' Diagnosis
Confirm that the instance URL pointed to in the error is from the same domain/site for both Jira and Confluence. For example, if the Jira site is
http://<instance>.atlassian.netConfluence is also underhttp://<instance>.atlassian.net.As a Jira administrator, go to the Application Links page (via ⚙ > Products > Application Links) and confirm that there is an application link with a "Config Error" message.
When editing the application link with errors, confirm that the instance's URL is the same as the Jira instance. Editing it will also show a No remote application link message.
As Confluence and Jira should be under the same instance's URL, on the list of application links, make sure that there is a System Confluence (Primary). There, tap the three dots (⋯) and select Go to remote to confirm that this is from the same URL as Jira.
In a Confluence page that has Jira issues linked, tap the Jira issue count at the top of the page, which will display a button to authenticate. Tapping this button will result in the same error message from Jira.
In the Jira issue, tap the View in Confluence to make sure that this is pointing to a page from the same URL, confirming that the access is properly granted:
Cause
By default, when Confluence and Jira are under the same instance, the application links are automatically created and can't be modified or removed. When attempting to configure a new application link for the already existing instance's URL, although it will be created, you will see the configuration error message.
This prevents the integration between both products from working properly because the erroneous application link will be used in the OAuth handshake process, rejecting the consumer key.
Solution
Delete the created application link, as there are already system ones that make the integration work automatically:
As a Jira administrator, go to Application Links (via the gear icon at the top-right > Products > Application Links).
Select the Delete option from the menu next to the application link.
Tap Delete again to confirm the deletion.
If an application link was also created in Confluence, make sure to perform the same process as a Confluence administrator. To do so, go to the cog icon (⚙) at the top-right and select Application Links to follow the same process as Jira.
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