Setting up checkpoint…
set CPU flags..
suspend…
Can not suspend container: Invalid argument
Error: unsupported deleted submount: (deleted)/dev/log
Checkpointing failed
Error in run_cmd (pcopy.c:334): Command date ‘+%s.%N’ > /tmp/tmp.sJn0B2zf0e; vzctl –skiplock chkpnt 31581 –suspend –flags 161183 1>&2 failed with code 16
Error: ploop copy -s /dev/ploop45973 failed
Error: Failed to copy top ploop delta
Killed by signal 15.

To find issue:
grep /dev/log /proc/*/mountinfo 2>/dev/null
/proc/20518/mountinfo:259 239 0:85 /log /dev/log rw,nosuid,relatime shared:161 – devtmpfs devtmpfs rw,size=1792000k,nr_inodes=448000,mode=755

lsof -p 20518
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 30264 mysql cwd DIR 182,735569 4096 5768267 /var/lib/mysq