DevNet validator won’t start after 0.7.5 → 0.9.3

We upgraded our DevNet validator (docker-compose, migration id 1) from Splice 0.7.5 to 0.9.3 on Oct 21 and it hasn’t started since. The upgrade landed in the topology freeze ahead of the LSU to serial 6 / PV 36, and at first the validator looped on check_establish_topology_mapping with FAILED_PRECONDITION: Condition is not yet observed, so we waited.

Two days later, init now fails at Vet packages and the app exits:

ABORTED: TOPOLOGY_TOO_MANY_PENDING_TOPOLOGY_TRANSACTIONS(2,77fbb546):
Too many pending topology transactions on this node.

The /info endpoint still shows current.serial_id: 5 with successor.serial_id: 6, so the LSU doesn’t seem to have completed yet (scheduled for Oct 21 13:00 UTC). Our guess is the participant’s topology outbox filled up with vetting transactions queued across restarts during the freeze.

Questions:

1. Is the DevNet LSU to serial 6 delayed? Where can we track its status?
2. Once it completes, will the outbox drain and vetting succeed on its own, or do we need a recovery step?
3. Anything we should do in the meantime? We haven’t touched topology state or rolled back.

Happy to share fuller logs. Thanks!