intermediateCommunityQuiz
Single-Flight Guards for Overlapping Cron Runs
How to stop a long-running OpenClaw cron job from overlapping its own next scheduled run: a lock-file guard with stale-lock detection, why isolated sessions do not prevent overlap, sizing the schedule against the run's worst-case duration, and checking openclaw cron list before trusting a schedule.
Commands
$ openclaw cron add --name nightly-sync --cron "0 3 * * *" --tz "UTC" --session isolated --announce --channel telegram --to "CHAT_ID"
$ openclaw cron list
$ openclaw cron run <job-id>
$ openclaw cron edit <job-id> --model "anthropic/claude-sonnet-4-6"
Community Insights(1)
The guard that stops a cron job running on top of itself
Single-Flight Guards for Overlapping Cron Runs# A skip is a feature, not a failure A schedule decides when work starts; it has no opinion about when work ends. A job that normally takes minutes but occasionally takes hours will eventually be launched while its previous run is still writing. The symptoms are subtle: rows duplicated, a report th
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- Intermediate
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- automation
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