What to do if a message from Kafka cannot be read or processed (corrupted message)?

When a message from Kafka cannot be read or processed (a corrupted message), the following approaches are usually applied:

1. Sending to Dead Letter Queue (DLQ) — a special queue for messages that could not be processed. This allows not to block the main processing flow and to save problematic messages for later analysis.

2. Logging and monitoring — recording processing errors with detailed information to understand the cause and fix the problem.

3. Retries — configuring repeated processing attempts with exponential backoff so that temporary issues do not lead to data loss.

4. Validation and filtering of messages — checking data correctness at the consumption stage to avoid processing clearly incorrect messages.

5. Manual processing — after placing in DLQ, messages can be analyzed and corrected manually or with special tools.

Thus, corrupted messages should not block the processing flow but should be isolated and processed separately.