## Summary
Speeds up webapp test jobs by balancing measured work across runners,
reducing repeated container setup, and ensuring test workers release
shutdown resources promptly. Unit tests run across 24 duration-aware
shards, while E2E tests run across two balanced shards.
## Design
`RunEngine` shutdown now closes processing resources before support
resources, continues cleanup if one close fails, and reuses one shutdown
promise for concurrent callers. Redis workers clear completed shutdown
deadlines so finished tests no longer wait on idle timers.
Container-heavy suites are split only where it improves parallelism, and
repeated replication and engine fixtures are consolidated where one
end-to-end case provides coverage. Timing weights are refreshed for all
affected files.
Dependency installation overlaps container pulls, and both workflows use
WarpBuild's Node setup action.
## What
A trigger request carrying a Unicode NUL (`U+0000`) in the **idempotency
key** or **debounce key** reached `prisma.taskRun.create()` and failed
the insert, so the caller got an opaque 500 and the run was never
created.
These two keys are stored in `jsonb` columns (`idempotencyKeyOptions`,
`debounce`), and Postgres rejects a NUL inside a `jsonb` value with
`SQLSTATE 22P05` ("unsupported Unicode escape sequence ... cannot be
converted to text"). This fix strips the NUL from both keys at the
single trigger-input chokepoint (`#buildEngineTriggerInput`), which
every trigger path flows through (single, batch item, mollified, and
drainer replay).
Stripping matches the existing precedent for run errors and task events.
It does not change dedup behaviour: the idempotency **dedup identity**
is the hashed key (a clean 64-char digest), computed independently of
the raw key we clean, so dedup keeps working exactly as before. For
debounce the key is used directly, so the cleaned key also becomes the
grouping key, an acceptable change for input that is already malformed.
## Why not payload / metadata / tags
Those are `text` columns fed by `JSON.stringify`, which escapes a NUL to
a safe escape sequence, so they do not hit this failure on the normal
JSON path. (A raw NUL in a `text` column throws a different code,
`22021`, and is not what triggers this issue.) The observed failures are
the `jsonb` `22P05` variant, which is only reachable via the two key
fields.
## Evidence
Red then green (containerTest, real Postgres): with the fix reverted,
triggering through the real service with a NUL in
`idempotencyKeyOptions.key` / `debounce.key` fails with the exact
`22P05` signature; with the fix, the run is created and the stored key
has the NUL removed.
Full-stack e2e (isolated stack, real HTTP): `POST
/api/v1/tasks/:taskId/trigger` with a NUL inside
`idempotencyKeyOptions.key` (`"acme<NUL>inc"`) and, separately,
`debounce.key` (`"grp<NUL>1"`):
- both returned `HTTP 200` with a created run (previously `500`)
- stored `idempotencyKeyOptions` = `{ "key": "acmeinc", "scope": "run"
}` (7 chars, NUL removed)
- stored `debounce.key` = `"grp1"` (4 chars, NUL removed)
- both runs render in the dashboard
Unit tests cover the helper (strip, no-op fast path, object-reference
reuse, null/undefined pass-through).
## Rollout / rollback
Server-only webapp change, no flag. Zero behaviour change for clean
input; only affects inputs that previously 500'd. Rollback is a straight
revert, no data migration.
## Known limitation
A raw NUL in a plain-string idempotency key (not created via
`idempotencyKeys.create()`) lands in a `text` column and throws `22021`
instead. That variant is not addressed here because stripping it would
change the dedup identity, so it warrants a separate decision. Not
observed in practice.
refs TRI-13030
Chris Arderne