main.mysqld--help 'unix' sometimes fails with a timeout in buildbot

Description

As of now, happened 3 times according to the cross-reference report:
http://buildbot.askmonty.org/buildbot/builders/kvm-bintar-quantal-x86/builds/1484
http://buildbot.askmonty.org/buildbot/builders/kvm-bintar-quantal-x86/builds/1479
http://buildbot.askmonty.org/buildbot/builders/kvm-bintar-quantal-x86/builds/1299

Always on 10.1*, always on kvm-bintar-quantal-x86.
Different slaves.
Couldn't reproduce it so far on the same VM image with the same sequence of tests

Environment

None

Assignee

Sergei Golubchik

Reporter

Elena Stepanova

Labels

Components

Fix versions

Affects versions

Priority

Minor
Configure