Error Codes

When Flyway commands fail, they throw an exception with a message to help you identify the problem. They also contain an error code which users of the API or those who have enabled machine readable output can inspect and handle accordingly. Below are details of each error code under the command that causes it along with a suggested solution.

General Error Codes

These error codes may appear from any command, and are indicative of more general errors.

`FAULT`

Caused by: An unexpected error within Flyway (e.g. a null pointer exception)
Solution: Please contact support or create a GitHub issue

`ERROR`

Caused by: An error due to invalid configuration or usage not caught by a more specific error code
Solution: Ensure all configuration and usage is as per the [documentation] (Configuration/parameters)

`JDBC_DRIVER`

Caused by: The JDBC driver is unable to be instantiated
Solution: Check whether the JDBC driver is present on the classpath

`DB_CONNECTION`

Caused by: Issues in SQL statements reported by the JDBC driver
Solution: Check whether the SQL provided to Flyway is correct

`CONFIGURATION`

Caused by: Incorrect configuration provided to Flyway
Solution: Ensure your configuration is as per the documentation

`DUPLICATE_VERSIONED_MIGRATION`

Caused by: Multiple versioned migrations having the same version
Solution: Ensure that all versioned migrations have a unique version

`DUPLICATE_REPEATABLE_MIGRATION`

Caused by: Multiple repeatable migrations having the same description
Solution: Ensure that all repeatable migrations have a unique description

`DUPLICATE_UNDO_MIGRATION`

Caused by: Multiple undo migrations that undo the same versioned migration
Solution: Ensure that there is at most one undo migration per versioned migration

`DUPLICATE_DELETED_MIGRATION`

Caused by: Schema history or filesystem corruption causing the same migration to appear to be deleted more than once
Solution: Ensure that you do not tamper with the schema history and all migrations that have been deleted are removed from locations known to Flyway

`NON_EMPTY_SCHEMA_WITHOUT_SCHEMA_HISTORY_TABLE`

Caused by: Having non-empty schemas but no schema history table (e.g. introducing Flyway to an existing database)
Solution: Run baseline or set baselineOnMigrate to true to initialize the schema history table

Validate Error Codes

These error codes are surfaced when running validate or validateWithResult.

`VALIDATE_ERROR`

Caused by: Some migrations have failed validation
Solution: Inspect the list invalidMigrations on the validate result to see the required actions

`SCHEMA_DOES_NOT_EXIST`

Caused by: The schema being validated against does not exist
Solution: Manually create the schema or enable createSchemas

`FAILED_REPEATABLE_MIGRATION`

Caused by: A failed repeatable migration was detected
Solution: Remove any incomplete changes then run repair to fix the schema history

`FAILED_VERSIONED_MIGRATION`

Caused by: A failed versioned migration was detected
Solution: Remove any incomplete changes then run repair to fix the schema history

`APPLIED_REPEATABLE_MIGRATION_NOT_RESOLVED`

Caused by: A repeatable migration that was applied wasn't resolved in any supplied locations
Solution: If you removed this migration intentionally run repair to mark the migration as deleted

`APPLIED_VERSIONED_MIGRATION_NOT_RESOLVED`

Caused by: A versioned migration that was applied wasn't resolved in any supplied locations
Solution: If you removed this migration intentionally run repair to mark the migration as deleted

`RESOLVED_REPEATABLE_MIGRATION_NOT_APPLIED`

Caused by: A repeatable migration that was resolved has not been applied
Solution: To ignore this migration set ignoreMigrationPatterns to *:ignored

`RESOLVED_VERSIONED_MIGRATION_NOT_APPLIED`

Caused by: A versioned migration that was resolved has not been applied
Solution: To ignore this migration set ignoreMigrationPatterns to *:ignored and to allow executing this migration enable outOfOrder

`OUTDATED_REPEATABLE_MIGRATION`

Caused by: An applied repeatable migration was resolved with a newer checksum and can be reapplied
Solution: Run migrate to execute this migration

`TYPE_MISMATCH`

Caused by: The type of the resolved migration (BASELINE, SQL, UNDO_SQL, ...) is different from the applied migration's
Solution: Either revert the changes to the migration or run repair to update the schema history

`CHECKSUM_MISMATCH`

Caused by: The checksum of the resolved migration is different from the applied migration's
Solution: Either revert the changes to the migration or run repair to update the schema history

`DESCRIPTION_MISMATCH`

Caused by: The description of the resolved migration is different from the applied migration's
Solution: Either revert the changes to the migration or run repair to update the schema history