Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: lvm2 (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1645636
Title:
deadlock during lvm snapshot
Status in lvm2 package in Ubuntu:
Confirmed
Bug description:
I'm doing backup of a running mongodb using LVM snapshot. Sometimes I
run into a deadlock situation and kernel reports blocked tasks for jbd2,
mongod, dmeventd and my tar doing backup.
This happens very rarely (one in a thousand) but the effect is rather
severe as mongodb stops working. I also can't remove and unmount the
snapshot.
I have Ubuntu 16.04.1 (lvm2 2.02.133-1ubuntu10) with mongod 3.2.9 on a
64bit system.
According to the link below its a kernel race fixed in latest lvm2
package.
https://www.redhat.com/archives/linux-lvm/2016-November/msg00037.html
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