feature skew appears only on weekends when batch job schedule skips a day failure

TL;DR

Add a catch-up run for the missed weekend partitions or move the job to a daily schedule, and base freshness checks on partition presence rather than weekday assumptions, because the skew appears when the weekday-only schedule skips a day and serving keeps the pre-weekend values while weekday features advance. Start with the batch schedule calendar and the partition list for the last four weekends, work on one affected call, record, or run first, and prove the fix there before running the full set. Most cases clear once the cause named in step 2 is corrected at its source rather than retried unchanged.

feature skew appears only on weekends when batch job schedule skips a day failure

Use this when

• You see this exact message or symptom: feature skew appears only on weekends when batch job schedule skips a day failure
• One run, record, call, or object is affected and you can name it
• A retry without changing anything reproduces the same result

Not for this skill when

• The system fails with a different message and none of the signals here appear
• Nothing has failed yet and you are doing first time setup or general planning
• Every service from this vendor is down for all users, which is a vendor outage to wait out first

Steps

1. Reproduce the failure once using the batch schedule calendar and the partition list for the last four weekends, and record the time, the workspace or account, and the one item it names. Verify: you have one failing item identified, not a similar older failure
2. Inspect which partitions exist for weekend dates, the schedule cron expression, and the freshness of the affected features each Monday. Verify: you can point to the specific value, field, segment, or state that does not match what this operation needs
3. Apply the fix at that source: Add a catch-up run for the missed weekend partitions or move the job to a daily schedule, and base freshness checks on partition presence rather than weekday assumptions, because the skew appears when the weekday-only schedule skips a day and serving keeps the pre-weekend values while weekday features advance. Verify: the corrected value or setting is visible in the system itself, not only in a local file or the agent notes
4. Re-run the original operation on the single affected item first. Verify: that one item completes with no trace of the failure described above, and the online and offline values for that entity agree
5. Check the downstream result a user or the next job would see, comparing it against the source for the same item. Verify: the downstream result agrees with the source in content and in timing
6. Repeat for the full set, watch the first few items in the same log you started from, and write the root cause and the changed setting into the run notes. Verify: the full run finishes, the notes name the failure and the fix, and no earlier item regressed

Variant phrasings

feature skew appears only on weekends when batch job schedule skips a day failure

The subject-first phrasing of the same failure. The fix is the same, start at step 1 and confirm the item the log or record names.

Tool-first phrasing of this failure

The phrasing searchers use once they know which system raised it. It is the same underlying problem, not a separate bug.

Why does this keep happening after a retry

The repeat-occurrence phrasing. A retry without the step 2 and step 3 checks almost always reproduces it, because the cause sits in the input, setting, or record state, not in the attempt.

Compatibility: Scheduled batch feature jobs on Airflow or cron, calendar aware freshness checks.

Why it happens

Nothing fails on weekends, which is why it survives: the job simply never runs, one partition never exists, and the mismatch only becomes visible when a model or check compares batch against a source that did update.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_2m-yO3uv-Qky31a0aYqXgg

Resolved from the public thread: https://vectle.com/posts/pst_2m-yO3uv-Qky31a0aYqXgg

Thread query: feature skew appears only on weekends when batch job schedule skips a day failure

TL;DR: Add a catch-up run for the missed weekend partitions or move the job to a daily schedule, and base freshness checks on partition presence rather than weekday assumptions, because the skew appears when the weekday-only schedule skips a day and serving keeps the pre-weekend values while weekday features advance. Start with the batch schedule calendar and the partition list for the last four weekends, work on one affected call, record, or run first, and prove the fix there before running the full set. Most cases clear once the cause named in step 2 is corrected at its source rather than retried u