Bitbucket Data Center 9.5 release notes
7 January 2025
The Bitbucket Data Center 9.5 release is now available for upgrade.
Highlights include:
Default reviewer groups for pull requests
For: ADMINS
Add reviewer groups as default reviewers of pull requests so that you no longer need to manually select individual default reviewers. When you create a pull request, the default reviewers from the selected groups will be immediately added to it.
To set up a group as default reviewers, select existing reviewer groups when adding default reviewers. Start adding reviewer groups as default reviewers
Rotate your encryption keys like clockwork
For: ADMINS
Bitbucket already automatically encrypts plaintext secrets through default secrets encryption. Now, you can further protect your system through encryption key rotation. Use API calls to re-encrypt your existing secrets with a new key, and to manage your inactive keys. This extra security is available for both single-node and clustered environments.
More details on encryption key rotation
Logging and profiling for mirrors
For: ADMINS
If both the mirror farm and upstream are upgraded to Bitbucket 9.5.0 and above, the admin console allows you to toggle logging and profiling for mirror farms. This allows quicker troubleshooting of issues without restarting the mirror farm.
Other improvements
Adaptive throttling now incorporates memory usage
For: ADMINS
Adaptive throttling for SCM hosting operations (for example, Git clone, fetch, and push) now incorporates memory usage when calculating the number of hosting tickets available. This helps to reduce the chance of the hosting load exhausting memory on under-provisioned systems, and reduces the need for manual tuning of adaptive throttling properties.
New endpoint for fetching delayed-sync mirrored repositories
For: ADMINS
A new REST end-point is added for fetching repositories that are delayed for syncing on mirrors. For more information please visit REST API docs.
Before you upgrade to 9.5
Before upgrading from an earlier version, check out our upgrade guide and upgrade matrix. Remember to renew your active software maintenance license too.
Download and install the Oracle driver if you use it as your database
Bitbucket Data Center 9.0 no longer includes the Oracle database driver.
If your Bitbucket instance connects to an Oracle database, manually download and install the Oracle thin driver before starting your upgrade. If you skip this step, Bitbucket won’t be able to connect to your Oracle database after the upgrade.
- Download the latest supported Oracle JDBC driver (ojdbc8.jar) directly from Oracle.
- To install the driver in your Bitbucket installation directory, follow the steps in our Connect Bitbucket to Oracle.
Plan for search reindex
Bitbucket Data Center 9.5 includes an updated bundled OpenSearch version that requires a new index format.
If you're using bundled search, your existing search indexes will be automatically cleared and rebuilt during the upgrade. Remote OpenSearch configurations are not affected.
Depending on your repository size, reindexing may take several hours or days. Plan your upgrade accordingly.
If you have concerns about reindexing time or want to explore alternatives, contact Atlassian Support to discuss your options.
Security advisories
At Atlassian, we prioritize the security of our products and have implemented a vulnerability management program to identify and resolve any security issues as quickly and comprehensively as possible. To stay informed about the latest security vulnerabilities and their corresponding fixes, visit Security Advisories.
As part of our new pull request experience from version 7.0 and higher, we have created a collection of new features for you to check out on one page, Enhancements to your code review workflow.
Change log
Resolved issues in Bitbucket Data Center 9.5.2
Released 7 March 2025
Resolved issues in Bitbucket Data Center 9.5.1
Released 11 February 2025
Resolved issues in Bitbucket Data Center 9.5.0
Released 7 January 2025