Public bug reported:
We encounter a multipath issue on Ubuntu 14.04.2 LTS.
dm state (i.e. failed) cannot be recovered automatically when the
interface is back. But path check state (i.e. faulty) can.
In order to describe the issue clearly, the attached slides shows the detail of
reproduce steps.
Meanwhile, attachment also includes the output from multipath tool.
P.S. We are writing the IO to the volume through dm device during the
interface enable/disable.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Attachment added: "Multipath_Issue.zip"
https://bugs.launchpad.net/bugs/1499622/+attachment/4474036/+files/Multipath_Issue.zip
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https://bugs.launchpad.net/bugs/1499622
Title:
multipath keep failure after the interface is recovered
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