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flyway

Retry a flyway failed migration


I'm just in the process of configuring and fully understanding flyway and I came into this situation:

  • I successfully configured a new project to work with flyway.
  • I successfully migrated a test database from version 0 to 1.0.3.
  • Migration to version 1.0.4 failed to execute. (I was trying to add column that was already there, no problems so far, my bad.)

However, once that I made the necessary changes to the corresponding script to work, flyway kept showing this message:

 Current schema version: 1.0.4
 com.googlecode.flyway.core.migration.MigrationException: Migration to version 1.0.4 failed! Please restore backups and roll back database and code!

Since I didn't want to restore a complete dump and apply every migration again, just to make an alter table script to work, what I finally did were some changes to the 'schema_version' table:

  • 1st I erased the entry for version 1.0.4
  • 2nd I set the 'current_version' field to 1 for version 1.0.3
  • And then executed the flyway:migrate command again

After this, the migration finally was applied and a success message shown, however I´m not quite sure if this is the right approach to deal kind of this situations. I'm no sure if its right to modify the 'schema_version' table by myself since i think it should only be modified by flyway itself.

So, after explaining what happened to me, my question would be:

Is there a way to 'retry' to apply a failed migration in flyway, without modifying the 'schema_version' table by myself?

Any command I'm not aware of to fulfill this task?


Solution

  • This is answered in the FAQ: http://flywaydb.org/documentation/faq.html#repair

    The upcoming Flyway 2.0 will include the repair command. This code is already checked into SCM.

    Note: This only deals with Flyway's metadata table. You are still responsible for cleaning up any other effects of a failed migration.

    Update: Flyway 2.0 has now been released. You can grab it at http://flywaydb.org