Comment 13 for bug 1806701

We got recurring problems with 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