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You started Cloud SQL Proxy but your application cannot connect to the database. Which of these is the most likely cause?

medium📝 Debug Q6 of 15
GCP - Cloud SQL and Databases
You started Cloud SQL Proxy but your application cannot connect to the database. Which of these is the most likely cause?
AThe service account used lacks Cloud SQL Client role
BAll of the above
CThe Cloud SQL instance is stopped
DThe proxy command used an incorrect instance connection name
Step-by-Step Solution
Solution:

  1. Step 1: Check permissions and instance status

    Missing Cloud SQL Client role or stopped instance both prevent connection.

  2. Step 2: Verify proxy command correctness

    Incorrect instance connection name causes proxy to fail connecting.

  3. Step 3: Combine causes

    Any of these issues can cause connection failure, so all are possible causes.

  4. Final Answer:

    All of the above -> Option B

  5. Quick Check:

    Permissions, instance status, and command correctness all matter [OK]
Quick Trick: Check roles, instance state, and connection name [OK]
Common Mistakes:
  • Ignoring permissions
  • Not verifying instance status
  • Using wrong instance name

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