[DRBD-user] PingAck did not arrive in time.

[Robert Altnoeder]

On 6/21/19 9:16 AM, Oleksiy Evin wrote:
> I've tried to update the kernel and DRBD 9 to the last available
> version, but nothing helped with the PingAck issue. So I had to
> downgrade to DRBD 8.4 which is started to replicate fine
> [...]
> Can anyone help me on the "PingAck did not arrive in time." repeated
> error while initial bitmap synchronization?
> [...]
> I'm using the basic drbd configuration on 527TB LVM volume

This is not generally a version problem, except maybe for the
performance side effects of various versions. It's probably actually a
size problem. Bitmap operations on a 527 TB volume take some time to be
processed, and some operation probably blocks one of the DRBD kernel
threads long enough to cause DRBD to be too slow to answer a DRBD PING
request from its peer.

There is an option "ping-timeout" (in the "net" section, the value being
in tenth of a second) that can be adjusted to change the ping timeout.

br,
Robert