temporalio/temporal · error

failed to determine Nexus operation scheduled event ID: %w

Error message

failed to determine Nexus operation scheduled event ID: %w

What it means

Error "failed to determine Nexus operation scheduled event ID: %w" thrown in temporalio/temporal.

Source

Thrown at service/history/api/describeworkflow/api.go:745

			TaskGroup:   nexusoperations.TaskTypeInvocation,
			NamespaceID: namespaceID.String(),
			Destination: op.Endpoint,
		})
		if cb.State() != gobreaker.StateClosed {
			state = enumspb.PENDING_NEXUS_OPERATION_STATE_BLOCKED
			blockedReason = "The circuit breaker is open."
		}
	}

	cancellationInfo, err := buildNexusOperationCancellationInfo(namespaceID, node, op, outboundQueueCBPool)
	if err != nil {
		return nil, err
	}

	// We store nexus operations in the tree by their string formatted scheduled event ID.
	scheduledEventID, err := strconv.ParseInt(node.Key.ID, 10, 64)
	if err != nil {
		return nil, fmt.Errorf("failed to determine Nexus operation scheduled event ID: %w", err)
	}

	return &workflowpb.PendingNexusOperationInfo{
		Endpoint:  op.Endpoint,
		Service:   op.Service,
		Operation: op.Operation,
		// TODO(bergundy): Remove this fallback after the 1.27 release.
		OperationId:             op.OperationToken,
		OperationToken:          op.OperationToken,
		ScheduledEventId:        scheduledEventID,
		ScheduleToCloseTimeout:  op.ScheduleToCloseTimeout,
		ScheduleToStartTimeout:  op.ScheduleToStartTimeout,
		StartToCloseTimeout:     op.StartToCloseTimeout,
		ScheduledTime:           op.ScheduledTime,
		State:                   state,
		Attempt:                 op.Attempt,
		LastAttemptCompleteTime: op.LastAttemptCompleteTime,
		LastAttemptFailure:      op.LastAttemptFailure,

View on GitHub (pinned to bde624efd1)

When it happens

Trigger: Thrown at service/history/api/describeworkflow/api.go:745 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of temporalio/temporal@bde624efd1 (2026-09-01). Data as JSON: /api/errors/1e0a079cef4b6814. Report an issue: GitHub.