How can I safely reset Hangfire to a clean state?

Question

I have a server with Hangfire installed. I haven't checked it for a while and it seems one recurring job has gone rogue. It stopped working and then it has stacked up with retries resulting in a complete lock it seems.

I would like to clear my database and start over. Can i just delete the data from all tables or should I drop the tables and let Hangfire recreate them for me? Am I risking anything by doing this?

Hangfire.State using entire Azure Basic database 2GB of space.

Answer 1

I ended up dropping the tables, at first the query did not work at all, it just kept going and nothing happened. I then used TRUNCATE TABLE [HangFire].[State] and it all worked like a charm after. Here is the script I used for Hangfire 1.5.6 with UseSqlServerStorage:

GO
PRINT N'Dropping [HangFire].[FK_HangFire_State_Job]...';


GO
ALTER TABLE [HangFire].[State] DROP CONSTRAINT [FK_HangFire_State_Job];


GO
PRINT N'Dropping [HangFire].[FK_HangFire_JobParameter_Job]...';


GO
ALTER TABLE [HangFire].[JobParameter] DROP CONSTRAINT [FK_HangFire_JobParameter_Job];


GO
PRINT N'Dropping [HangFire].[Schema]...';


GO
DROP TABLE [HangFire].[Schema];


GO
PRINT N'Dropping [HangFire].[Job]...';


GO
DROP TABLE [HangFire].[Job];


GO
PRINT N'Dropping [HangFire].[State]...';


GO
DROP TABLE [HangFire].[State];


GO
PRINT N'Dropping [HangFire].[JobParameter]...';


GO
DROP TABLE [HangFire].[JobParameter];


GO
PRINT N'Dropping [HangFire].[JobQueue]...';


GO
DROP TABLE [HangFire].[JobQueue];


GO
PRINT N'Dropping [HangFire].[Server]...';


GO
DROP TABLE [HangFire].[Server];


GO
PRINT N'Dropping [HangFire].[List]...';


GO
DROP TABLE [HangFire].[List];


GO
PRINT N'Dropping [HangFire].[Set]...';


GO
DROP TABLE [HangFire].[Set];


GO
PRINT N'Dropping [HangFire].[Counter]...';


GO
DROP TABLE [HangFire].[Counter];


GO
PRINT N'Dropping [HangFire].[Hash]...';


GO
DROP TABLE [HangFire].[Hash];


GO
PRINT N'Dropping [HangFire].[AggregatedCounter]...';


GO
DROP TABLE [HangFire].[AggregatedCounter];


GO
PRINT N'Dropping [HangFire]...';


GO
DROP SCHEMA [HangFire];


GO
PRINT N'Update complete.';


GO