Monitoring MongoDB CDC Source Connector for Confluent Cloud

The MongoDB CDC Source connector exposes metrics through the Confluent Cloud Metrics API to assist with connector monitoring and troubleshooting.

Connector metrics

The MongoDB CDC Source connector provides two metric types:

• Snapshot metrics

• Streaming metrics

All metrics share the prefix io.confluent.kafka.connect/mongodb_cdc_source_connector_. The tables below list only the metric suffix.

Snapshot metrics

Snapshot metrics help you monitor the connector during snapshot operations. These metrics are only available if a snapshot is currently active or if the connector has performed a snapshot since its last start.

Metric	Type	Description
snapshot_running	int	Whether the snapshot is running. Values: 0 = false, 1 = true.
snapshot_completed	int	Whether the snapshot is complete. Values: 0 = false, 1 = true.
snapshot_aborted	int	Whether the snapshot was aborted. Values: 0 = false, 1 = true.
snapshot_milliseconds_since_last_event	long	The number of milliseconds since the last snapshot event was recorded.
snapshot_total_number_of_events_seen	long	The total number of events the connector has processed since its last start or reset.
snapshot_duration_in_seconds	long	The total number of seconds that the snapshot has taken so far, even if not complete.
snapshot_paused_duration_in_seconds	long	The total paused duration of the snapshot, in seconds.
snapshot_number_of_disconnects	long	The number of disconnects by the connector during the snapshot.

Streaming metrics

Streaming metrics help you monitor the connector when streaming changes from the database.

Metric	Type	Description
streaming_is_connected	int	Whether the connector is connected to the database server. Values: 0 = false, 1 = true.
streaming_milliseconds_since_last_event	long	The number of milliseconds since the last streaming event was recorded.
streaming_total_number_of_events_seen	long	The total number of data change events reported by the source database since the connector was last started or since a metrics reset.
streaming_number_of_events_filtered	long	The number of events filtered out based on the include or exclude list rules configured in the connector.
streaming_number_of_committed_transactions	long	The number of processed transactions that were committed.
streaming_number_of_disconnects	long	The number of times the connector disconnected.
streaming_number_of_primary_elections	long	The number of primary elections observed by the connector.
lag_milliseconds	long	The number of milliseconds between the timestamp of the last change event and the time the connector processed it. The value incorporates any clock differences between the machines where the database server and the connector are running.