[Piuparts-reports] problem with piuparts-slave detected

[piuparts slave]

Either a test is running for a very long time (but no test
should run longer than an hour), piuparts-slave hangs or is
not running at all or wasn't started with
~piupartss/bin/slave_run - please investigate and take
appropriate measures!

21:06:05 -------------------------------------------
21:06:05 Running section stretch2proposed (precedence=3)
21:06:05 idle (3543)
21:06:05 -------------------------------------------
21:06:05 Running section stretch-rcmd (precedence=4)
21:06:21 Reserved for us: science-all 1.7
21:06:21 Master didn't reserve anything (more) for us
21:06:21 Master stretch-rcmd status: successfully-tested=50833 failed-testing=10 cannot-be-tested=3 waiting-to-be-tested=1 waiting-for-dependency-to-be-tested=0 dependency-failed-testing=6 dependency-cannot-be-tested=0 dependency-does-not-exist=4 unknown=0 outdated=0 total=50857
21:06:21 Connection to master closed
21:06:26 Testing package stretch-rcmd/science-all 1.7