Overview

CID diagram

RMA

Discover Phase: Identify Failures

ID	Interaction	Failure Short Name	Failure Description	Response
1	Listener → Authentication Server	Authentication Timeout	The server fails to respond within the expected time due to high traffic.	Notify the user and retry the request automatically after a delay. Monitor server performance and scale up if necessary.
2	Listener → Recommendation API	Data Unavailable	Recommendation data is missing due to a failure in the Analytics Database.	Provide fallback recommendations or display a user-friendly error. Alert the database team to resolve the issue.
3	Streaming Server → Music Database	Query Failure	The database fails to return metadata for the requested track due to connection issues.	Retry the query. If the failure persists, display a "track unavailable" message. Log the incident for further investigation.

Rate Phase: Analyze Failures

ID	Interaction	Impact	Likelihood	Time to Detect (TTD)	Time to Recover (TTR)	Risk (Impact × Likelihood)
1	Listener → Authentication Server	High	Medium	< 5 minutes	10 minutes	High
2	Listener → Recommendation API	Medium	High	5–15 minutes	20 minutes	Medium
3	Streaming Server → Music Database	High	Low	< 5 minutes	15 minutes	Medium

Act Phase: Mitigation Strategies

Scaling for High Traffic:

• Introduce auto-scaling for the Authentication Server during peak traffic.
• Implement caching for frequent authentication requests.

Fallback for Recommendations:

• Cache popular recommendations to serve users when the Analytics Database is unavailable.
• Regularly back up recommendation data.

Database Redundancy:

• Use database replication and load balancing for the Music Database.
• Monitor database health and configure automated failover.