[Qa-jenkins-scm] Build failed in Jenkins: reproducible_setup_schroot_unstable_armhf_jtx1a #3

[jenkins at jenkins.debian.net]

See <https://jenkins.debian.net/job/reproducible_setup_schroot_unstable_armhf_jtx1a/3/display/redirect>

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Started by user Holger Levsen
[EnvInject] - Loading node environment variables.
Building remotely on jtx1a-armhf-rb.debian.net (armhf jtx1a) in workspace <https://jenkins.debian.net/job/reproducible_setup_schroot_unstable_armhf_jtx1a/ws/>
[reproducible_setup_schroot_unstable_armhf_jtx1a] $ /bin/sh -xe /tmp/hudson7900574261785543800.sh
+ /srv/jenkins/bin/jenkins_master_wrapper.sh
Host key verification failed.
Sat  3 Jun 22:49:08 UTC 2017 - jtx1a-armhf-rb.debian.net seems to be down, exiting with error.
Build step 'Execute shell' marked build as failure