[DRBD-user] Sending time expired on SyncSource node

[Bao Nguyen]

Hello everyone,

When my 2 nodes resync the data (about 7GB data), I see that a lot of
below messages on the SyncSource node:

drbd drbd0 my-1: [drbd_s_drbd0/6434] sending time expired, ko = 4294967295

The resync has been done after about 2h.

I am using drbd 9.0.1.

Could you please let me know what is the meaning of this message? Is
it a drbd data packet cannot be sent? And in what conditions the
message is thrown, is it network overload? and how to avoid this
message?

Thanks a lot,
Brs,
Bao