/rm/web results in HTTP 400 error
Accepted answer
One possible cause is that the database server is not running.
Make sure that database server is up and running.
If the possible cause is that the database server is not running, you will see the following in rm.log
ERROR com.ibm.team.repository - CRJAZ2654E The server was unable to connect to the database because the database connection settings are invalid or because database is unreachable (SQLSTATE: 08001, SQLCODE: -4499). Verify the connection settings in your teamserver.properties file. See the Jazz Team Server log for more information.