[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!

15:49:59 Reserved for us: goldendict-wordnet 1:3.0-35
15:49:59 Reserved for us: amarok-common None
15:49:59 Master stretch2buster-rcmd status: successfully-tested=44114 failed-testing=688 cannot-be-tested=2 waiting-to-be-tested=284 waiting-for-dependency-to-be-tested=763 dependency-failed-testing=4980 dependency-cannot-be-tested=2 dependency-does-not-exist=5 unknown=0 outdated=0 total=50838
15:49:59 Connection to master closed
15:50:09 Deleting old reference-chroot-metadata.dat
15:50:09 Testing package stretch2buster-rcmd/gaupol 1.3.1-1
15:57:17 Deleting outdated reference-chroot-metadata.dat
15:57:17 Testing package stretch2buster-rcmd/shorewall6-lite 5.1.12.3-1
15:59:36 Testing package stretch2buster-rcmd/python-taurus-doc None
16:00:45 Testing package stretch2buster-rcmd/astro-all 1.2