What happens when a worker process crashes in a Node.js cluster?

Difficulty: 5/10

cluster module, worker lifecycle, process recovery

When a worker crashes, the master process receives an 'exit' event. You can listen to this event and call cluster.fork() to automatically respawn a new worker, ensuring high availability of the application.

Worker crashes are a natural occurrence in production environments. The Cluster module provides the 'exit' event on the cluster object that fires whenever a worker dies. You must explicitly handle this event and fork a new worker — Node.js does NOT automatically restart crashed workers without your intervention.

Auto-Restarting Crashed Workers

Exit Event Properties

1
worker — the Worker object that exited
2

What happens when a worker process crashes in a Node.js cluster?

Difficulty: 5/10

cluster module, worker lifecycle, process recovery

When a worker crashes, the master process receives an 'exit' event. You can listen to this event and call cluster.fork() to automatically respawn a new worker, ensuring high availability of the application.

Auto-Restarting Crashed Workers

Exit Event Properties

1
worker — the Worker object that exited
2

What happens when a worker process crashes in a Node.js cluster?

When a worker crashes, the master process receives an 'exit' event. You can listen to this event and call cluster.fork() to automatically respawn a new worker, ensuring high availability of the application.

What happens when a worker process crashes in a Node.js cluster?

When a worker crashes, the master process receives an 'exit' event. You can listen to this event and call cluster.fork() to automatically respawn a new worker, ensuring high availability of the application.

Scenario Questions

Follow-up Questions