Error: dynamodb streams missing events

Missing DynamoDB stream events usually require checking the write, active stream ARN, consumer position, filtering, and retention. DynamoDB Streams has no configurable buffer size to increase. Records expire after 24 hours, and writes that leave an item unchanged produce no stream record.

1. Confirm the write succeeded and changed the item after Streams was enabled. Enabling a stream does not replay the table’s existing contents.
2. Compare DescribeTable.LatestStreamArn with the consumer’s ARN. Disabling and re-enabling Streams creates a new stream.
3. Inspect the consumer’s starting position and checkpoint. A new Lambda mapping using LATEST can miss writes during mapping creation; TRIM_HORIZON starts with retained records.
4. Check Lambda FilterCriteria, IteratorAge, errors, throttles, and retry or record-age settings. Filtered or discarded records do not invoke the handler.
5. For custom readers, follow child shards and use each returned NextShardIterator. A single empty GetRecords response does not prove the shard is finished.

Expired records cannot be recovered from DynamoDB Streams. Restore application state from another durable source when needed, and make replayed processing idempotent. Global-table replication and consumer delivery semantics also matter when comparing events across Regions.

See stream behavior and AWS documentation.