A node could show OFFLINE in the console with zero logs explaining why
(rustfs/backlog#888, reported in rustfs#4304): the consecutive-failure
threshold crossing in handle_server_info_failure marked the peer offline
silently, the per-call warnings only existed on the observing node and
never named the transition, and the PeerRestClient offline flag plus its
background recovery monitor ran without any start/success log.
Logging-only change, no behavior change:
- handle_server_info_failure / handle_storage_info_failure: WARN
event="peer_marked_offline" exactly once at the threshold crossing
(later failures while already offline stay DEBUG), and DEBUG
event="peer_probe_failure" while returning cached state below the
threshold.
- update_server_info_cache / update_storage_info_cache: INFO
event="peer_recovered_online" when a probe succeeds after the peer had
been reported offline.
- PeerRestClient::mark_offline_and_spawn_recovery: WARN
event="peer_connection_marked_offline" when the offline flag is first
set (guarded by the recovery_running CAS so repeated failures do not
spam), and INFO event="peer_connection_recovered" with the attempt
count when connectivity is restored.
An "offline then back" episode now leaves a complete, correlatable
trace: N probe failures -> peer_marked_offline -> recovery monitor ->
peer_recovered_online.
Verification:
- cargo test -p rustfs-ecstore --lib (notification + peer_rest suites)
- make pre-commit
Ref: rustfs/backlog#888, rustfs#4304
Co-authored-by: heihutu <[email protected]>
