child_process: 'close' not emitted after .disconnect() in parent process

Version: v9.8.0
Platform: Linux 64bit
Subsystem: child_process

When calling child.disconnect() from a parent process (not in cluster mode), the child process object does not emit a close event after the exit event.

If however the child process itself calls process.disconnect() it works as expected.

Example:

// parent.js
const child_process = require('child_process');

const child = child_process.fork('./child.js', {
    stdio: ['pipe', 'pipe', 'pipe', 'ipc']
});

setTimeout(() => {
    child.disconnect();
}, 1000);

child.on('exit', () => {
    console.log('exit');
});

child.on('close', () => {
    console.log('close');
});

child.stderr.pipe(process.stderr);
child.stdout.pipe(process.stdout);

// child.js
process.on('disconnect', () => {
    console.log('cya');
});

Output:

cya
exit

Expected Output:

cya
exit
close

@laino

ping @laino

child_process: fix channel disconnect logic

This issue has been marked as stale due to 210 days of inactivity.
It will be automatically closed in 30 days if no further activity occurs. If this is still relevant, please leave a comment or update it to keep it open.

This issue has been automatically closed after 30 days of inactivity following its stale status (no activity for a total of 120 days).
If this is still relevant, feel free to reopen it or leave a comment with additional details so we can continue the discussion.

child_process: emit 'close' after explicit disconnect()

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child_process: 'close' not emitted after .disconnect() in parent process #19433

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child_process: 'close' not emitted after .disconnect() in parent process #19433

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ryzokuken commented on Jun 7, 2018

github-actions commented on Jun 27, 2026

github-actions commented on Jul 28, 2026

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