What are the alternative scenarios and failures that can occur across the entire integration chain?

Various alternative scenarios and failures can occur in an integration chain, affecting the stability and correctness of the system. The main ones include:

• Network failures: packet loss, high latency, disconnections between services.
• Service unavailability: one of the components may be temporarily unavailable due to failures, updates, or overload.
• Data errors: incorrect, incomplete, or conflicting data transmitted between systems.
• Timeouts: exceeding the response wait time from an external service.
• Message duplication: resending the same message due to failures or retries.
• Unforeseen formats: changes in data format or protocol without proper synchronization.
• Authentication and authorization issues: access denial due to incorrect or expired tokens.
• Processing errors: failures in processing logic on one of the components.

For each of these scenarios, mechanisms for failure handling should be provided, such as:

• Retry attempts with exponential backoff
• Use of queues and buffers
• Data validation and filtering
• Monitoring and alerting
• Fallbacks and backup paths

Understanding and documenting such scenarios helps improve the reliability and predictability of integration processes.