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https://issues.apache.org/jira/browse/MESOS-5236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15249169#comment-15249169
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Shuai Lin commented on MESOS-5236:
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[~nfnt] It's not likely a configuration problem, because there is a test filter
that would disable overlay related tests when it detects overlayfs is not
supported, that's what would happen when the overlay kernel module is not
loaded.
After some googling I found a similar issue
[here|https://github.com/coreos/rkt/issues/1537], which is caused by "overlay
over overlay". It could happen If the tests is running inside a docker
container, and the docker storage driver happens to be overlayfs.
[~neilc] can you confirm it?
> OverlayBackendTest.ROOT_OVERLAYFS_OverlayFSBackend test flakiness
> -----------------------------------------------------------------
>
> Key: MESOS-5236
> URL: https://issues.apache.org/jira/browse/MESOS-5236
> Project: Mesos
> Issue Type: Bug
> Reporter: Neil Conway
> Labels: flaky, flaky-test, mesosphere
>
> Observed on internal Mesosphere CI:
> {noformat}
> [13:31:06] : [Step 10/10] [ RUN ]
> OverlayBackendTest.ROOT_OVERLAYFS_OverlayFSBackend
> [13:31:06]W: [Step 10/10] I0419 13:31:06.708961 23289 overlay.cpp:161]
> Provisioning image rootfs with overlayfs:
> 'lowerdir=/tmp/Dkgh5V/source2:/tmp/Dkgh5V/source1,upperdir=/tmp/Dkgh5V/scratch/rootfs/upperdir,workdir=/tmp/Dkgh5V/scrat\
> ch/rootfs/workdir'
> [13:31:06] : [Step 10/10]
> ../../src/tests/containerizer/provisioner_backend_tests.cpp:97: Failure
> [13:31:06] : [Step 10/10] (backends["overlay"]->provision( {layer1,
> layer2}, rootfs, sandbox.get())).failure(): Failed to mount rootfs
> '/tmp/Dkgh5V/rootfs' with overlayfs: No such device
> [13:31:06] : [Step 10/10] [ FAILED ]
> OverlayBackendTest.ROOT_OVERLAYFS_OverlayFSBackend (5 ms)
> {noformat}
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