[DRBD-user] Not enough free bitmap slots when assigning a resource on an additional node

[Yannis Milios]

Hello,

On a 3 node/zfs backed drbd9 cluster, while trying to assign-resource on an
additional node, I'm getting "Not enough free bitmap slots" and the resync
does not start.

Removing/reassigning the resource does not help either. I couldn't find
enough information about this error when searching ML archives.

Any ideas what is causing this ?

Thanks

Some logs:
========
│[137368.869743] drbd vm-122-disk-1: Preparing cluster-wide state change
3649068569 (0->-1 3/1)
                            │
│[137368.870076] drbd vm-122-disk-1: State change 3649068569:
primary_nodes=5, weak_nodes=FFFFFFFFFFFFFFF8
                                       │
│[137368.870078] drbd vm-122-disk-1: Committing cluster-wide state change
3649068569 (0ms)
                           │
│[137368.870082] drbd vm-122-disk-1: role( Secondary -> Primary )

                          │
│[142124.120066] drbd vm-122-disk-1 pve1: Preparing remote state change
152764597 (primary_nodes=1, weak_nodes=FFFFFFFFFFFFFFFC)
                             │
│[142124.120284] drbd vm-122-disk-1 pve1: Committing remote state change
152764597
                             │
│[142124.120289] drbd vm-122-disk-1: State change failed: Refusing to be
Outdated while Connected
                            │
│[142124.120399] drbd vm-122-disk-1/0 drbd103: Failed: disk( UpToDate ->
Outdated )
                            │
│[142124.120410] drbd vm-122-disk-1: FATAL: Local commit of prepared
152764597 failed!
                                 │
│[142124.350767] drbd vm-122-disk-1: Preparing cluster-wide state change
3667315219 (0->1 496/16)
                            │
│[142124.350948] drbd vm-122-disk-1: State change 3667315219:
primary_nodes=5, weak_nodes=FFFFFFFFFFFFFFFB
                                       │
│[142124.350949] drbd vm-122-disk-1 pve2: Cluster is now split

                         │
│[142124.350950] drbd vm-122-disk-1: Committing cluster-wide state change
3667315219 (0ms)
                           │
│[142124.350970] drbd vm-122-disk-1 pve2: conn( Connected -> Disconnecting
) peer( Secondary -> Unknown )
                          │
│[142124.350973] drbd vm-122-disk-1/0 drbd103 pve2: pdsk( Diskless ->
DUnknown ) repl( Established -> Off )
                                │
│[142124.350994] drbd vm-122-disk-1 pve2: ack_receiver terminated

                          │
│[142124.350996] drbd vm-122-disk-1 pve2: Terminating ack_recv thread

                          │
│[142124.467248] drbd vm-122-disk-1 pve2: Connection closed

                          │
│[142124.467428] drbd vm-122-disk-1 pve2: conn( Disconnecting -> StandAlone
)
                          │
│[142124.467432] drbd vm-122-disk-1 pve2: Terminating receiver thread

                          │
│[142124.467504] drbd vm-122-disk-1 pve2: Terminating sender thread

                          │
│[142133.966538] drbd vm-122-disk-1 pve2: Starting sender thread (from
drbdsetup [1502468])
                              │
│[142133.968349] drbd vm-122-disk-1/0 drbd103 pve2: Not enough free bitmap
slots
                           │
│[142135.077014] drbd vm-122-disk-1/0 drbd103 pve2: Not enough free bitmap
slots
                           │
│[142227.488145] drbd vm-122-disk-1/0 drbd103 pve2: Not enough free bitmap
slots
                           │
│[142232.509729] drbd vm-122-disk-1/0 drbd103 pve2: Not enough free bitmap
slots
                           │
│[142272.526580] drbd vm-122-disk-1/0 drbd103 pve2: Not enough free bitmap
slots
                           │
│[143361.840005] drbd vm-122-disk-1 pve2: Terminating sender thread

                          │
│[143505.002551] drbd vm-122-disk-1 pve2: Starting sender thread (from
drbdsetup [3396832])
                              │
│[143505.004330] drbd vm-122-disk-1/0 drbd103 pve2: Not enough free bitmap
slots
                           │
│[143506.090369] drbd vm-122-disk-1/0 drbd103 pve2: Not enough free bitmap
slots
                           │
│[143633.980319] drbd vm-122-disk-1 pve2: Terminating sender thread
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