We're using Teamcity 8.0.1 (build 27435). Having this exact same problem. Trying to connect to a bitbucket repo and getting the following exception intermittently:
Failed to collect changes, error: List remote refs failed:
org.eclipse.jgit.errors.TransportException:
https://username@bitbucket.org/myproject/project.git: -1 null
Behind a proxy server and I have added -Dhttps.proxyHost=XXX -Dhttps.proxyPort=1234 to the TEAMCITY_SERVER_OPTS environment variable. That didn't work. There was mention of trying to upgrade to Java7 on another forum but that also didn't help.
Unfortunately, we're not able to use SSH to bitbucket because of the company network rules.
Anyone solved this problem or have suggestions? Thanks for the help!