The MR job that runs functional tests, RunTests, does not report back on which tests passed and failed. The mapper that runs each functional test merely outputs the text from standard output, and the reducer is just an identity reducer. As noted in a comment:
Update the job to produce results that allow a tester to ascertain the pass/fail status of each test. For example:
- which tests passed and which failed
- a count of pass and fail
- which hosts ran which tests, for drilling down
While this only applies to 1.4/1.5, it's worth checking if 1.6 has a similar capability and the nature of its reporting.