process.title don't change process name

[Oleg Kurochkin]

• Version: v10.16.1
• Platform: 18.7.0 Darwin Kernel Version 18.7.0: Thu Jun 20 18:42:21 PDT 2019; root:xnu-4903.270.47~4/RELEASE_X86_64 x86_64
• Subsystem: process

Hello

In v10.16.1

process.title = "test";

stops changing process name

In v10.15.3
All works as expected

[Anna Henningsen]

/cc @nodejs/platform-macos since on Linux this seems to work

[Oleg Kurochkin]

I use nvm, my steps to reproduce:

nvm use v10.15.3 && /
node -e "process.title = 'process.title test'; process.stdin.resume();"

nvm use v10.16.1 && /
node -e "process.title = 'process.title test'; process.stdin.resume();"

[James M Snell]

Can I ask you to check to see if the current Node.js 12.x release works? Like to see if this regression is specific to 10.x or not.

[Rich Trott]

Can I ask you to check to see if the current Node.js 12.x release works? Like to see if this regression is specific to 10.x or not.

I can reproduce the issue in 12.0.0 and 12.7.0. Like original reporter, I'm seeing the problem in 10.16.1 but not in 10.15.3. I also see the problem in 10.16.0.

[Rich Trott]

8.16.0 does not have the bug.

So, to summarize for supported release lines on macOS:

• All 12.x are affected.
• 10.16.0 and newer are affected. 10.15.3 and earlier are not affected.
• All 8.x are not affected.

[Richard Lau]

Sounds like it could be libuv related based on the Node.js versions affected. Node.js 10.16.0 bumped libuv from 1.23.2->1.28.0.

[James M Snell]

Windows also appears to work as expected

[Richard Lau]

Maybe libuv/libuv@00c6b16#diff-60fd60fae228080a06862eae92a6e25 which came with libuv 1.24.0?

[Rich Trott]

git bisect confirms that this bug was introduced with the upgrade to libuv 1.24.0 in 9cef7b8. I suppose the thing to do is open an issue in the libuv repository. @nodejs/libuv

[Ben Noordhuis]

I can confirm that libuv/libuv@00c6b16 is responsible (but don't ask me why.) I've opened a revert in libuv/libuv#2405.

[Anna Henningsen]

Re-opening since this isn’t fixed in Node.js yet.

[Ron Korving]

And I think we'll want a regression test for this.

[Richard Lau]

There’s test-setproctitle.js. Perhaps someone on macOS can figure out why it isn’t currently failing?

[Colin Ihrig]

Perhaps someone on macOS can figure out why it isn’t currently failing?

It looks like ps and other commands use a different data source than the Activity Monitor. I don't know much beyond that, but the commands in test-setproctitle.js do return the correct title for me.

[Corey Butler]

This appears to be an issue again in 14.x.x. Works in 13.x.x.

cc @cjihrig @addaleax @bnoordhuis @Trott

[Ben Noordhuis]

@coreybutler Can you file a new issue and link back to this one?

[Corey Butler]

@bnoordhuis sure, ^^