The 'Submit' via Gerrit is disabled for the older project 'Impala' to make sure that no one accidentally does a 'Submit'. It is now only available in 'Impala-ASF'. Code reviews can still continue in 'Impala' and +1/+2 permissions are still available, although I would recommend abandoning changes and moving them to the 'Impala-ASF' project.
- Sailesh
