{"id":"dynamodb-streams-null-iterator-shard-sealed","text":"A DynamoDB Streams shard iterator becomes null when the shard is sealed (READ_ONLY); child shards must be fetched to continue reading.","truth_value":"IN","source":"entries/2026/03/11/amazondynamodb-latest-developerguide-StreamsLowLevelWalkthroughhtml.md","source_url":"","source_hash":"79b70837eea6788d","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"dynamodb-streams-null-iterator-shard-sealed","truth_value":"IN","reason":"premise"}]}}