- **Version**: 4.4.0, 5.9.0 - **Platform**: Linux test 4.4.4-calculate #1 SMP PREEMPT Wed Mar 9 16:35:58 MSK 2016 x86_64 Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz GenuineIntel GNU/Linux - **Subsystem**: cluster, documentation In [documentation](https://nodejs.org/dist/latest-v5.x/docs/api/cluster.html#cluster_event_message_1): ``` Event: 'message'# worker <cluster.Worker> message <Object> Emitted when any worker receives a message. ``` but real use is: ``` cluster.on('message', msg => { /* worker isn`t known */ }) ```