Snippet Name: Flyway_Repair_Process

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Created Date: 2025-06-16 13:12:43
Last Modified Date: 2025-05-31 10:31:49

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Title: Flyway Repair Process
Author: user
i have a flyway deployment to an AWS RDS isntnace, but the script failed due to a timeout. i am being asked to do a flyway "repair", can you walk me thru the steps?

Author: ChatGPT
User is working with a Flyway deployment to an AWS RDS instance.

Author: tool
Model set context updated.

Author: ChatGPT
To perform a Flyway repair after a deployment failure, follow these steps:

### 1. **Understand What Flyway Repair Does**
   Flyway???s `repair` command is used to fix metadata issues in the `flyway_schema_history` table. It will:
   - Remove failed migrations.
   - Recalculate checksums of applied migrations (if necessary).
   - It doesn't re-execute failed migrations; it just cleans up metadata.

### 2. **Preparation**
   - Ensure you have Flyway installed and configured to connect to your AWS RDS instance.
   - Back up your RDS database, especially the `flyway_schema_history` table, in case any repairs affect production data.

### 3. **Run Flyway Repair**
   In your terminal or command prompt, navigate to your Flyway project folder (where the Flyway configuration file `flyway.conf` or the `flyway` executable is located). Then run:

   ```bash
   flyway repair
   ```

   This command connects to your database and updates the Flyway schema history, removing any failed migrations.

### 4. **Verify the Repair**
   After running `repair`, you should verify the `flyway_schema_history` table to ensure that:
   - Failed migration entries are removed.
   - There are no other issues with the migrations.

### 5. **Reapply Migration**
   After the repair, you can rerun the Flyway migration:

   ```bash
   flyway migrate
   ```

   This will attempt to rerun any unapplied migrations.

### 6. **Check for Timeouts**
   Since the original issue was a timeout, you might need to adjust timeout settings in Flyway or AWS RDS. For Flyway, check your `flyway.conf` file for the following parameters:
   ```properties
   flyway.connectRetries=10  # Default is 5, you can increase it
   flyway.timeout=<desired_value_in_seconds>  # You can set a longer timeout if needed
   ```

   For AWS RDS, consider checking the database instance configuration to increase query execution timeout limits.

Would you like more specific information about handling timeouts, or about adjusting Flyway settings for your environment?