To effectively monitor and diagnose a sudden increase in ingestion errors, a data engineer must utilize theAlerting Servicein Adobe Experience Platform. By enablingAlert Rules for Ingestion Failures and Flow Run Failures (Option A), the engineer can receive proactive notifications whenever a dataflow encounters an issue.

Alerts provide the necessary operational visibility by linking directly to theMonitoringdashboard, where the engineer can inspect specific flow runs. This allows for the investigation of error codes, such as schema validation mismatches or identity resolution failures, which are common in streaming sources. WhilePartial Ingestion (Option B)can help a process continue by skipping faulty records, it is a data handling strategy rather than a monitoring capability to "understand the cause" of failures.

Options C and D refer toAdobe I/O Eventsor general system events, which are primarily used for building external, custom webhook integrations rather than using the native, built-in monitoring and alerting UI specifically designed for dataflow oversight. By subscribing to native alerts, the data engineer ensures they are notified of failures as they happen, allowing for immediate remediation to maintain the integrity of theReal-Time Customer Profile.