Issue Summary

An intermittent problem that seems quite vague to reproduce occurs on Jira whereby the project pages on a Jira returns a 500 error when loading. The associated confluence page on the project page refuses to load and shows the below warning to contact support.

Steps to Reproduce

1. Link a confluence space or page in Jira's project page
2. Revisit the page and it will display an error.
3. This problem seems to be hard to replicate in some instances.

Expected Results

The associated project page show simply display the result

Actual Results

A failure occurs due to →

could not map exception type org.springframework.transaction.UnexpectedRollbackException with message 'Transaction rolled back because it has been marked as rollback-only' to a specific REST status. 

Defaulting to InternalServerError

Which results in 500 errors and a rollback is done

The below exception is thrown in the log

message: Performing rollback. Transactions:
  ->[null]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly (Session #1970057003)
   micros_container: confluence
   product: confluence
   thread: http-nio-8081-exec-4 [tenantId:d5a0dca1-21be-4ad4-8ac2-dd508e93a0eb, experience:unknown] [traceId:13986d0a37d244a4]
   time: 2021-09-24T13:12:16.870827535Z
   timestamp: 2021-09-24T13:12:16.870

On Jira, the project pages seem to be making a request to the collab service by request the URL for the page or space that has been linked

https://your-instance.atlassian.net/wiki/rest/api/content/1655xxxx32/child/page?limit=200&start=0&expand=childTypes.page,history.contributors.publishers.users,history.lastUpdated,metadata.frontend.collabService

Workaround

• Connect to another page or space in Jira’s project pages and reconnect the previous page again.

• Create the space via Project pages in Jira. Then browse over to Confluence, and create a new page there, refreshing it in Jira.