Cannot validate Subversion repository during plan configuration  

The most common repository error is :

This is not a valid Subversion Repository: svn: Authentication required for '<http://svnhost:80; My Subversion Repository'

In all likelihood, the authentication failed due to invalid login credentials. Please double-check  your username and password and try again.

Using self signed SSL certifactes

If you are using a self signed, you need to get subversion to cache your repository connection as there is no way to instruct Bamboo to accept self-signed SSL certificates.

On Linux

• Open up a command line (as the user running Bamboo) and checkout your repository before using Bamboo.

On Windows

• If you are running Bamboo as a service on Windows, then consult this document to run the service as the local user, 
• Login as the user running Bamboo, and checkout your repository.

Troubleshooting SVN Connection

If you are still having trouble connecting to repository,

1. Try logging in outside of Bamboo, from the command line or from any other repository client. If this step fails, then it's likely that your repository is not configured correctly.
2. Please the consult our JIRA issue tracker for known Bamboo repository issues.
3. If you still can't connect to Subversion, please raise a support request and attach your atlassian-bamboo server logs to the support request.