Events emitted while managing machine IDs. Nonce generation is never instrumented.
The module emits no events when the optional :telemetry dependency is unavailable.
Lease operation spans
Lease acquisition, renewal, and release emit a span, where operation is :acquire,
:renew, or :release.
- Start:
[:no_noncense, :machine_id, :lease, operation, :start] - Stop:
[:no_noncense, :machine_id, :lease, operation, :stop]
Start measurements:
:system_time- system time in native time units when the operation began.:monotonic_time- monotonic time in native time units when the operation began.
Stop measurements:
:duration- elapsed monotonic time in native time units.:ttl_ms- granted lease duration in milliseconds; present only for successful acquire and renew operations.
Both events include these metadata fields:
:strategy- the lease strategy module.source: :initial | :reacquire | :cache | :scheduled | :shutdown- the operation's lifecycle path.
Stop events also include result: :ok | :error | :retry | :lost. :retry and :lost
distinguish strategy-confirmed transient failures from confirmed lease loss.
Lease state events
Retry scheduled
[:no_noncense, :machine_id, :lease, :retry] reports that a failed acquisition or renewal
will be retried.
Measurements:
:attempt- the retry attempt number.:delay_ms- the delay before retrying, in milliseconds.
Metadata:
operation: :acquire | :renew.:reason- the strategy's atom reason, or:otherwhen the reason is not an atom.
Lease lost
[:no_noncense, :machine_id, :lease, :lost] reports local expiry or a confirmed loss of the
lease.
Measurements:
:remaining_ttl_ms- milliseconds remaining in the locally tracked lease lifetime, clamped to zero.
Metadata:
:reason- the loss reason as an atom, or:otherwhen the reason is not an atom.
Conflict guard events
Peer checked
[:no_noncense, :machine_id, :conflict_guard, :peer_checked] reports the result of comparing
this node's machine ID with a peer. It has no measurements.
Metadata:
outcome: :conflict | :no_local_id | :match.
Conflict detected
[:no_noncense, :machine_id, :conflict_guard, :conflict] reports a duplicate machine ID. It
has no measurements.
Metadata:
resolution: :local_node | :remote_node- whether this node or the peer resolves the conflict.