We have downgraded to kernel 3.19.x on the affected host and can also confirm the bug is not present there:
# uname -a
Linux host6 3.19.0-47-generic #53-Ubuntu SMP Mon Jan 18 14:02:48 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Currently we will have to run the 3.19-series kernel until the bug gets fixed. We are unable to use a mainstream kernel on that host, as we rely on aufs, which is not available in that kernel.
We have downgraded to kernel 3.19.x on the affected host and can also confirm the bug is not present there:
# uname -a
Linux host6 3.19.0-47-generic #53-Ubuntu SMP Mon Jan 18 14:02:48 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Currently we will have to run the 3.19-series kernel until the bug gets fixed. We are unable to use a mainstream kernel on that host, as we rely on aufs, which is not available in that kernel.