[Solved] Why does the following code fail to restart a worker after it crashes? cluster.on('exit', (worker, code, signal) => { if (code !== 0) { worker.fork(); } }); | Node.js

Node.js - Cluster Module

Why does the following code fail to restart a worker after it crashes?

cluster.on('exit', (worker, code, signal) => {
  if (code !== 0) {
    worker.fork();
  }
});

AWorkers restart automatically; no need to call fork

BThe condition should check signal, not code

CThe exit event does not provide code or signal parameters

Dworker.fork() is not a valid method; should call cluster.fork()

Step-by-Step Solution

Solution:

Step 1: Verify method to create new worker
Only cluster.fork() creates new workers; worker.fork() does not exist.
Step 2: Correct method usage
To restart a worker, call cluster.fork() inside the exit event handler.
Final Answer:
worker.fork() is not a valid method; should call cluster.fork() -> Option D
Quick Check:
Use cluster.fork() to restart workers [OK]

Quick Trick: Call cluster.fork(), not worker.fork(), to restart workers [OK]

Common Mistakes:

Master "Cluster Module" in Node.js

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Why does the following code fail to restart a worker after it crashes?