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If the scheduler receives an error, it will never restart again since `bgw_restart_time` is set to `BGW_NEVER_RESTART`, which will prevent all jobs from executing. This commit adds the GUC `timescaledb.bgw_scheduler_restart_time` that can be set to the restart time for the scheduler. It defaults to 60 seconds, which is the default restart interval for background workers PostgreSQL defines. It also adds `timescaledb.debug_bgw_scheduler_exit_status` to be able to shutdown the scheduler with a non-zero exit status, which allows the restart functionality to be tested. It also ensures that `backend_type` is explicitly set up rather than copied from `application_name` and add some more information to `application_name`. It also updates the tests to use `backend_type` where applicable.
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Fixes: #7527 Restart scheduler on error |
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