Automatic retry of failed jobs

Jobs that throw an unhandled Error during execution are automatically retried. The exponential backoff strategy provided by BullMQ is configured by default via the defaultBullMQQueueOptions in conf/initializers/workers.ts and may be customized there as needed:

    defaultBullMQQueueOptions: {
      defaultJobOptions: {
        removeOnComplete: 1000,
        removeOnFail: 20000,
        // 524,288,000 ms (~6.1 days) using algorithm:
        // "2 ^ (attempts - 1) * delay"
        attempts: 20,
        backoff: {
          type: 'exponential',
          delay: 1000,
        },
      },
    },

This config is sent directly to BullMQ, so see the BullMQ retry documentation for details on how to customize the retry strategy.

Do not wrap a backgrounded method in a broad try/catch just to log and continue. If the job cannot complete, let the error throw so BullMQ records the failure and applies retry/backoff. Catch only a specific, expected error when the correct outcome is genuinely to continue.