[Solved] Consider a microservice system where requests are sent to both old and new versions during... If the old service returns response A and the new service returns response B, what should the system do? | Microservices

Microservices - Migration from Monolith

Consider a microservice system where requests are sent to both old and new versions during parallel running. If the old service returns response A and the new service returns response B, what should the system do?

AIgnore the difference and continue using the new service

BSwitch back to the old service permanently

CStop the old service immediately

DLog the difference and alert engineers for investigation

Step-by-Step Solution

Solution:

Step 1: Understand output comparison in parallel running
Parallel running compares outputs to detect discrepancies between old and new services.
Step 2: Decide action on output mismatch
If outputs differ, the system should log the difference and alert engineers to investigate before switching fully.
Final Answer:
Log the difference and alert engineers for investigation -> Option D
Quick Check:
Output mismatch = log and alert [OK]

Quick Trick: Log and alert on output differences during parallel running [OK]

Common Mistakes:

Ignoring output differences
Stopping old service too early
Switching back permanently without investigation

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More Microservices Quizzes

If the old service returns response A and the new service returns response B, what should the system do?

Step 1: Understand output comparison in parallel running

Step 2: Decide action on output mismatch

Final Answer:

Quick Check:

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