[Drbd-dev] DRBD9 - ASSERTION FAILED: pp_in_use

[Ml Ml]

Hello List,

i am writing to this Dev-Mailing list because i dont seem to get help
or an answer on the drbd-users mailing list or the proxmox support
team.

We run a 3 Node (Proxmox) Cluster with drbd, and each time we add the
3rd node we run into this error after a while:

(...)
[Mon Sep 26 19:39:57 2016] drbd vm-105-disk-1 node07: ASSERTION
FAILED: pp_in_use: -29 < 0
[Mon Sep 26 19:40:00 2016] drbd vm-105-disk-1 node07: ASSERTION
FAILED: pp_in_use: -1 < 0
[Mon Sep 26 19:40:00 2016] drbd vm-105-disk-1 node07: ASSERTION
FAILED: pp_in_use: -5 < 0
[Mon Sep 26 19:40:00 2016] drbd vm-105-disk-1 node07: ASSERTION
FAILED: pp_in_use: -13 < 0
[Mon Sep 26 19:40:00 2016] drbd vm-105-disk-1 node07: ASSERTION
FAILED: pp_in_use: -29 < 0
(...)

This error spams my logs and after a while the system gets unseable
slow until you have to hard reset it.

root at node06:~# dpkg -l |grep drbd
ii  drbd-utils                     8.9.8-1
amd64        RAID 1 over TCP/IP for Linux (user utilities)
ii  drbdmanage                     0.97.3-1
amd64        Distributed configuration management for DRBD

root at node06:~# uname -r
4.4.19-1-pve


I was told on the irc freenode channel:
- to use the latest github drbd source
- to no use drbd9 yet

I also asked the drbd users in april:
  http://lists.linbit.com/pipermail/drbd-user/2016-April/022893.html

Is this a bug or a wrong setup? I really love drbd but with this
problem we might have to move to ceph if we cant solve it.... :-(

I would be glad for any hint.
( i dont even understand what that error means )

Thanks.