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doc: note message event listeners ref IPC channels
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The IPC channel is referenced with the message event too.

PR-URL: #11494
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sam Roberts <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
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DiegoRBaquero authored and MylesBorins committed Mar 9, 2017
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6 changes: 3 additions & 3 deletions doc/api/child_process.md
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Expand Up @@ -536,9 +536,9 @@ spawn('prg', [], { stdio: ['pipe', null, null, null, 'pipe'] });
*It is worth noting that when an IPC channel is established between the
parent and child processes, and the child is a Node.js process, the child
is launched with the IPC channel unreferenced (using `unref()`) until the
child registers an event handler for the `process.on('disconnected')` event.
This allows the child to exit normally without the process being held open
by the open IPC channel.*
child registers an event handler for the `process.on('disconnect')` event
or the `process.on('message')` event.This allows the child to exit normally
without the process being held open by the open IPC channel.*

See also: [`child_process.exec()`][] and [`child_process.fork()`][]

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