Hello Manuel, I found a bug in liblockfile1, which makes a lockfile stale after 10 seconds instead of 5 minutes (#505851). So, please report if the fix mentioned there also solves your problem, then we can merge and close this bug.
All the best, Wolfram -- Dipl.-Ing. Wolfram Sang | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry
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