Investingating the 16.04.x problem.
The multipathd instance in initramfs _sometimes_ does not die with the default
signal, only with 9.
It's intermittent.
And refuses to happen with -d / foreground logging enabled. sigh.
I'll try to insert rsyslog into initramfs and get something useful.
It looks like a deadlock among the main and another thread.
Continuing tomorrow.
Begin: Running /scripts/local-bottom ... Begin: Stopping multipathd ... done.
done.
Begin: Running /scripts/init-bottom ... done.
Spawning shell within the initramfs
BusyBox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.
(initramfs) ps w | grep multipath
433 root 1357m S /sbin/multipathd -B
3486 root 3456 S {exe} grep multipath
(initramfs) kill 433
(initramfs) ps w | grep multipath
433 root 1357m S /sbin/multipathd -B
3489 root 3456 S {exe} grep multipath
(initramfs) kill -9 433
(initramfs) ps w | grep multipath
3492 root 3456 S {exe} grep multipath
(initramfs) grep PRETTY /etc/*release
PRETTY_NAME="Ubuntu 16.04.2 LTS"
...
another run:
(initramfs) ps w | grep multipathd
434 root 1357m S /sbin/multipathd -B
3524 root 3456 S {exe} grep multipathd
(initramfs) kill 434
(initramfs) ps w | grep multipathd
434 root 1357m S /sbin/multipathd -B
3527 root 3456 S {exe} grep multipathd
(initramfs) ls -ld /proc/434/task/*
dr-xr-xr-x 7 0 /proc/434/task/440
dr-xr-xr-x 7 0 /proc/434/task/434
(initramfs) cat /proc/434/task/434/stack
[<0000000000000a01>] 0xa01
[<c000000000015c78>] __switch_to+0x1f8/0x350
[<c000000000166578>] futex_wait_queue_me+0xf8/0x1e0
[<c000000000167d74>] futex_wait+0x174/0x2c0
[<c000000000169e44>] do_futex+0x234/0xd70
[<c00000000016aa34>] SyS_futex+0xb4/0x1e0
[<c000000000009204>] system_call+0x38/0xb4
(initramfs) cat /proc/434/task/440/stack
[<c0000002afd8adc0>] 0xc0000002afd8adc0
[<c000000000015c78>] __switch_to+0x1f8/0x350
[<c000000000166578>] futex_wait_queue_me+0xf8/0x1e0
[<c000000000167d74>] futex_wait+0x174/0x2c0
[<c000000000169e44>] do_futex+0x234/0xd70
[<c00000000016aa34>] SyS_futex+0xb4/0x1e0
[<c000000000009204>] system_call+0x38/0xb4
(initramfs)
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https://bugs.launchpad.net/bugs/1670811
Title:
Multipath services fails to start on Ubuntu 17.04 on boot and kdump
(initramfs)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1670811/+subscriptions
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