Module backoff 

How long the pipeline waits before trying again. Generic scheduling math; which error codes are even retryable is super::classification.

Constants

JITTER_MAX_SECS

NO_USABLE_ENROLMENT_RECHECK_SECS

How long before the pipeline looks for an enrolment again on its own; a student recheck or enrolment discovery can wake the row sooner.

SUBMITTING_RECOVERY_GRACE_SECS

A row still submitting this long belongs to a worker that died mid-call. Must stay comfortably longer than the client’s request timeout, so a live request is never condemned.

SUBMIT_BASE_BACKOFF_SECS

SUBMIT_MAX_BACKOFF_SECS

SUBMIT_MAX_RETRY_AGE_SECS

After this long in failure a row stops being retried and becomes a support case.

UNCERTAIN_MAX_CHECKS

After this many fruitless checks a human is asked to look in Sisu. The row still never resubmits.

UNCERTAIN_RECHECK_SECS

How long between the checks that look for an attainment we may or may not have created.

VERIFY_BASE_BACKOFF_SECS

VERIFY_FIRST_DELAY_SECS

Sisu needs a few minutes before a submitted attainment shows up, so the first poll waits.

VERIFY_GIVE_UP_POLL_SECS

VERIFY_MAX_AGE_SECS

After this, polling drops to daily and a human looks. Never a failure: the attainment may exist, and calling it failed would invite a second submission.

VERIFY_MAX_BACKOFF_SECS

Functions

next_attempt_at

Spreads a batch that failed together, so it does not come back as one thundering herd.

submit_backoff_secs

submit_window_expired

verify_backoff_secs

The import phase schedules the first poll, so one prior attempt still means the base delay.

verify_window_expired