CSS/JS resources not loaded over Tomcat HTTPS connector, breaking UI

Summary

When accessing Bamboo over an HTTPS connector configured in Tomcat's server.xml, the UI appears broken under certain browsers as some CSS/JS resources are not being loaded.

Steps to Reproduce

1. Configure an HTTPS connector in <BAMBOO_INST>/conf/server.xml
2. Start Bamboo and attempt to connect over HTTPS in Chrome or Firefox

Note: This issue does not present in Safari.

Expected Results

UI should load as normal

Actual Results

• UI appears broken, as the browser refuses to load certain CSS/jQuery resources. See attached bamboo_login_ui.png
• Chrome throws an ERR_SSL_PROTOCOL_ERROR. See attached bamboo_510_https_connector.har

Workaround

The HTTPS connector definition in <BAMBOO_INST>/conf/server.xml can be modified to work around this. Add the following attribute:

protocol="org.apache.coyote.http11.Http11Protocol"

to your existing HTTPS connector declaration.