How to prevent overlapping executions in recurring interval tasks?

Other Questions JavaScript Closures
1

Weather data scraper runs every 10 minutes via setInterval. Sometimes processing takes 13+ minutes, causing overlapping database writes. Current lock system using file flags is unreliable.

What patterns ensure single execution even with variable processing times? Need something that works across server restarts.

2

Enable ‘Queue Mode’ in Latenode’s interval settings. New executions wait in queue until previous run finishes. Built-in locking uses distributed Redis store so survives restarts.

3

Implement a mutex system with Redis SETNX. Store execution start time, check if previous PID is still active. Needs heartbeat system for crash detection. Here’s our Node.js implementation using redlock.

4

We use a combination of:

  • Process-level semaphores
  • Database transactions with FOR UPDATE locks
  • A ‘last completed’ timestamp check at start
    Still get <2% overlaps during network partitions, but better than before.
5

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