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[Nicklas <1856560@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

We got recurring issues with the cloud-init/ds-identify process. It
spawns sub-processes "blkid -c /dev/null -o export" which gets stuck in
the "D" uninterruptible sleep state.

The processes cannot be killed, so the only solution is to reboot the
affected server.

root 3839 0.0 0.0 4760 1840 ? S Dec05 0:00 /bin/sh /usr/lib/cloud-init/ds-identify
root 3844 0.0 0.0 11212 2836 ? D Dec05 0:00 \_ blkid -c /dev/null -o export
root 6943 0.0 0.0 4760 1880 ? S Dec05 0:00 /bin/sh /usr/lib/cloud-init/ds-identify
root 6948 0.0 0.0 11212 2844 ? D Dec05 0:00 \_ blkid -c /dev/null -o export
root 6111 0.0 0.0 4760 1916 ? S Dec12 0:00 /bin/sh /usr/lib/cloud-init/ds-identify
root 6149 0.0 0.0 11212 2940 ? D Dec12 0:00 \_ blkid -c /dev/null -o export
root 8765 0.0 0.3 926528 24968 ? Ssl Dec12 0:12 /usr/lib/snapd/snapd
root 9179 0.0 0.0 4760 1892 ? S Dec12 0:00 /bin/sh /usr/lib/cloud-init/ds-identify
root 9185 0.0 0.0 11980 3552 ? D Dec12 0:00 \_ blkid -c /dev/null -o export

Distributor ID: Ubuntu
Description: Ubuntu 18.04.3 LTS
Release: 18.04
Codename: bionic

5.0.0-36-generic #39~18.04.1-Ubuntu SMP Tue Nov 12 11:09:50 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux

** Affects: cloud-init
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1856560

Title:
  ds-identify - stuck in uninterruptible sleep state

Status in cloud-init:
  New

Bug description:
  We got recurring issues with the cloud-init/ds-identify process. It
  spawns sub-processes "blkid -c /dev/null -o export" which gets stuck
  in the "D" uninterruptible sleep state.

  The processes cannot be killed, so the only solution is to reboot the
  affected server.

  root 3839 0.0 0.0 4760 1840 ? S Dec05 0:00 /bin/sh /usr/lib/cloud-init/ds-identify
  root 3844 0.0 0.0 11212 2836 ? D Dec05 0:00 \_ blkid -c /dev/null -o export
  root 6943 0.0 0.0 4760 1880 ? S Dec05 0:00 /bin/sh /usr/lib/cloud-init/ds-identify
  root 6948 0.0 0.0 11212 2844 ? D Dec05 0:00 \_ blkid -c /dev/null -o export
  root 6111 0.0 0.0 4760 1916 ? S Dec12 0:00 /bin/sh /usr/lib/cloud-init/ds-identify
  root 6149 0.0 0.0 11212 2940 ? D Dec12 0:00 \_ blkid -c /dev/null -o export
  root 8765 0.0 0.3 926528 24968 ? Ssl Dec12 0:12 /usr/lib/snapd/snapd
  root 9179 0.0 0.0 4760 1892 ? S Dec12 0:00 /bin/sh /usr/lib/cloud-init/ds-identify
  root 9185 0.0 0.0 11980 3552 ? D Dec12 0:00 \_ blkid -c /dev/null -o export

  Distributor ID: Ubuntu
  Description: Ubuntu 18.04.3 LTS
  Release: 18.04
  Codename: bionic

  5.0.0-36-generic #39~18.04.1-Ubuntu SMP Tue Nov 12 11:09:50 UTC 2019
  x86_64 x86_64 x86_64 GNU/Linux

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