Hangfire Recurring job runs every 30 minutes while it's still unfinished

Question

I'm using Hangfire to run jobs that take roughly 2 hours. I have noticed that every 30 minutes the job re occurs while the previous one is still working. So If I have Job A which starts at a specific time, after 30 minutes another job A will start running while previous one is still in processing state.

ConfigureServices():

services.AddHangfire(config => config
        .UseSimpleAssemblyNameTypeSerializer()
        .UseDefaultTypeSerializer()
        .UseMemoryStorage());



        services.AddHangfireServer();

Configure():

app.UseHangfireDashboard();

RecurringJob.AddOrUpdate<ISender>(i => i.A(), Cron.Daily(8, 0), timeZone: TimeZoneInfo.Local);

I have checked the Method which is run for errors, exceptions and etc, just to make sure job is not retried because of that. I think that's not a case after a lot of testing.

any kind of help would be appreciated

Answer 1

I'm not sure if this is right way, but it solved the problem for me.

It was caused by UseMemoryStorage() in ConfigureServices().

Passing options like the example below will restrict a job to reoccur after 30 minutes by default or whatever will be indicated in options.

var options = new MemoryStorageOptions
{
    FetchNextJobTimeout = TimeSpan.FromHours(10)
};

services.AddHangfire(config => config.SetDataCompatibilityLevel(CompatibilityLevel.Version_170)
  .UseSimpleAssemblyNameTypeSerializer()
  .UseDefaultTypeSerializer()
  .UseMemoryStorage(options));