[Solved] Identify the error in this Micrometer counter registration code:Counter counter = Counter.builder("my.counter") .description("Counts events") .register(null); | Spring Boot

Spring Boot - Actuator

Identify the error in this Micrometer counter registration code:

Counter counter = Counter.builder("my.counter")
  .description("Counts events")
  .register(null);

ACounter.builder() requires a MeterRegistry parameter

BMissing call to increment() method

CPassing null to register causes NullPointerException

DDescription method is not valid for Counter

Step-by-Step Solution

Solution:

Step 1: Analyze register() method parameter
The register() method requires a non-null MeterRegistry instance.
Step 2: Effect of passing null
Passing null causes a NullPointerException at runtime.
Final Answer:
Passing null to register causes NullPointerException -> Option C
Quick Check:
Null MeterRegistry in register() = runtime error [OK]

Quick Trick: Always pass a valid MeterRegistry to register() [OK]

Common Mistakes:

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