build-cran-binaries/.crow
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fix(ci): give each xvfb-run its own display (#230)
Every `process-cran-updates-ubuntu-2204-arm64` cron run since pipeline 13744 has failed with `xvfb-run: error: Xvfb failed to start` (e.g. 13829).

## Cause

The newer-R loop added in #216 runs two `xvfb-run` calls back to back: the R-minor-sensitive `process_cran_updates` pass, then `local/build-newer-r.R`.
Without `-a`, `xvfb-run` always uses display `:99`, and on exit it kills its Xvfb without waiting for it.
The second call can therefore start while the old server still holds the `:99` lock, so the new Xvfb refuses to start.
Only ubuntu-2204-arm64 hits this because it is the only image with a second R minor installed, so the loop body only runs there.

## Change

- Default `XVFB_ARGS` to `-a` (`--auto-servernum`) in `process-updates.yaml`, `build-all-versions.yaml` and `weekly-rebuild-missing.yaml`, so each call picks a free display.
- The RHEL 10 `xwfb-run` branch still overrides `XVFB_ARGS` with `-c weston`, so it is unchanged.

## Verification

`crow lint .crow/` passes.
A local repro was not possible (`docker run` hangs on the dev host), so the next ubuntu-2204-arm64 cron run is the real check.

Reviewed-on: #230
2026-10-11 12:12:28 +00:00
..
archive-missed-packages.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
auto-apply-patches.yaml fix(ci): install RPostgres for audit workflows (#172) 2026-08-30 07:31:28 +00:00
backfill-abi-classification.yaml feat(abi): backfill classifier verdicts for pre-per-minor packages (#199) 2026-09-04 10:34:49 +00:00
backfill-flat-safety.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
build-all-versions-install-deps.yaml fix(ci): make every manual gate default to a value that matches nothing (#158) 2026-08-09 15:31:14 +00:00
build-all-versions.yaml fix(ci): give each xvfb-run its own display (#230) 2026-10-11 12:12:28 +00:00
process-updates.yaml fix(ci): give each xvfb-run its own display (#230) 2026-10-11 12:12:28 +00:00
prune-stale-flat-binaries.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
rebuild-abi-gap.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
reindex.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
repair-built-stamp.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
repair-unsafe-flat-objects.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
retire-slot.yaml feat(slots): add a retirement workflow and a drift check (#214) 2026-09-11 13:14:17 +00:00
trial-build-registry.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
verify-repo-routing.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
weekly-audit-missing.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00
weekly-patch-proposals.yaml fix(ci): install RPostgres for audit workflows (#172) 2026-08-30 07:31:28 +00:00
weekly-rebuild-missing.yaml fix(ci): give each xvfb-run its own display (#230) 2026-10-11 12:12:28 +00:00
weekly-rebuild-reindex.yaml chore(alpine): drop the deprecated Alpine 3.22 slot (#213) 2026-09-11 07:27:03 +00:00