Telemetry showed ~66 PropagationGridWorker exceptions per 6h with
55 ArgumentErrors and 11 TimeoutErrors, producing ~13 discarded
chain steps. Each discard broke the chain: subsequent forecast
hours were never enqueued, leaving the score store with huge gaps
(e.g. at 14:11 UTC the earliest available forecast was 18:00,
because f00-f05 all failed somewhere upstream and nothing ran
after them).
Three changes:
1. PropagationGridWorker: on the final attempt, still enqueue
fh+1 even when this step failed. Oban discards the current
job normally — but the rest of the chain keeps running, so
one bad hour doesn't take out the remaining 12-18. The
rescue is factored into a tested public helper.
2. HrrrClient.parse_idx: skip malformed idx lines instead of
raising. NOAA S3 occasionally serves an HTML error page as
the idx body, and the old strict String.to_integer path
raised ArgumentError on the first non-numeric line and took
down the chain step. This is the root cause of the 55
ArgumentErrors.
3. JS renderTimeline: when no forecast hour is at-or-before
wall-clock (all times are future — the gap scenario the
fixes above are designed to prevent), stop labeling the
earliest future slot "Now". Lets the user see honest
"+Nh" offsets instead of a lie on the pill.
The :propagation queue (2 slots) is shared by PropagationGridWorker,
MrmsFetchWorker (every 2 min), and PropagationPruneWorker (every
15 min). Oban dispatches priority-then-FIFO, so a post-deploy
MRMS/prune backlog could delay the hourly chain step until the
siblings drained.
Set PropagationGridWorker priority: 0 explicitly and drop the two
siblings to priority: 5 so new chain steps always jump ahead.
Backfill workers live on separate queues (:hrrr, :weather, :terrain,
:iemre, :narr, :radar, :mechanism) and already don't interact with
the predictor.
A full f00-f18 sweep takes ~170 min of wall time, longer than the
~90 min gap between deploys on this cluster. Over the last 7 days
every run was killed mid-sweep and zero runs completed. The
propagation_scores table only ever held the scraps from partial
runs that landed before the pod died, which is why the map looked
like it was showing "the current hour" (or nothing).
The worker now processes exactly one forecast hour per perform/1
(~8-10 min) and enqueues the next hour as a fresh Oban job. A cron
fire with empty args seeds the chain at f00; subsequent runs carry
run_time + forecast_hour args. At f18 the chain stops and the
pruner runs. Each step broadcasts propagation:updated immediately
so new hours appear on the map as they land.
Wall time per perform drops from ~170 min to ~10 min, so Lifeline's
2h rescue window is no longer a factor and a pod restart loses at
most one forecast hour instead of the whole sweep. Retries and
max_attempts now describe a single fh, not the whole chain.
Also: bump the :propagation queue from 1 to 2 slots so
PropagationPruneWorker can run alongside the chain job, drop the
worker timeout/1 from 90 min to 20 min to match single-fh runs,
and pull Lifeline rescue_after from 120 min to 45 min to keep the
safety net above the step timeout.
Adds a "Data from HH:MM UTC · Nh ago/now/+Nh" indicator above the
pipeline chip in both the mobile and desktop sidebars so the user
can tell which valid_time the map is showing when the bottom
timeline isn't visible.
