- `errorHandler` - A function that will listen for error event on each worker
- `onlineHandler` - A function that will listen for online event on each worker
- `exitHandler` - A function that will listen for exit event on each worker
- `errorHandler` - A function that will listen for error event on each worker
- `onlineHandler` - A function that will listen for online event on each worker
- `exitHandler` - A function that will listen for exit event on each worker