Public bug reported: 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 ** Affects: lvm2 (Ubuntu) Importance: Undecided Status: Confirmed ** Attachment added: "apport.lvm2.zslncg_0.apport" https://bugs.launchpad.net/bugs/1645636/+attachment/4784626/+files/apport.lvm2.zslncg_0.apport -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1645636 Title: deadlock during lvm snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1645636/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
