Azure Functions local process not killed properly on Mac/IntelliJ

[justinyoo]

Hi, Team.

I'm not sure this is the issue from this plugin or IntelliJ itself, but I'd like to create an issue here. Here's my dev environment:

• Mac OS (Monterey; 12.2)
• IntelliJ CE (2021.3.2)
• Azure Tools for IntelliJ 3.61.1 - 2021.3
• Azure Functions Core Tools v4 4.0.3971

Here's how to reproduce the error:

1. Run an Azure Functions app from IntelliJ.
2. Confirm that it takes the port of 7071.
3. Stop the app.
4. Re-run the Azure Functions app from IntelliJ.
5. Confirm that the port 7071 is still occupied by another process.

Therefore, in order to re-run the Function app, I have to manually find and kill the process every time. Here's what I use to kill the process:

https://gist.github.com/justinyoo/045201b2c4280c818ca872af6284c720

I google'd whether it's the issue of IntelliJ itself or this plugin, and found these threads:

• https://intellij-support.jetbrains.com/hc/en-us/community/posts/115000763924-My-java-processes-don-t-terminate-so-I-need-to-kill-9-them-
• https://intellij-support.jetbrains.com/hc/en-us/community/posts/360003265560-Unable-to-terminate-sub-process-from-which-I-m-draining-stdout-stderr

Although they're a bit old conversations, apparently other devs are experiencing similar issues. So, I checked the code how it's handled and found it:

azure-tools-for-java/PluginsAndFeatures/azure-toolkit-for-intellij/azure-intellij-plugin-appservice/src/main/java/com/microsoft/azure/toolkit/intellij/legacy/function/runner/localrun/FunctionRunState.java

Lines 413 to 417 in 52be6ef

	private static void stopProcessIfAlive(final Process proc) {
	if (proc != null && proc.isAlive()) {
	proc.destroy();
	}
	}

As I'm not a Java dev, I don't know what the code exactly means. But, I suspect that the code doesn't kill all the child processes. Because Azure Functions runtime takes at least two processes - main for the runtime itself and one sub process for the language worker, when the tool stops the process it should stop all the processes including main and its sub.

it would be great if you can take a look.

[Flanker32]

@justinyoo Thanks a lot for your report and investigation, we will looking into this issue, and will update here once there are updates.

[wcom939]

This also occurs on Windows

[justinyoo]

This also occurs on Windows

It's not the case to me. I only see this issue on Mac OS.

[Flanker32]

@wcom939 Thanks for your information, could you please share some more info like the function core tools and toolkit version?

[wcom939]

It occurred for me when closing intellij while not terminating the run dialog. I had to restart my PC to clear it. Running windows 11.

Azure Functions Core Tools
Core Tools Version: 4.0.3971 Commit hash: d0775d487c93ebd49e9c1166d5c3c01f3c76eaaf (64-bit)
Function Runtime Version: 4.0.1.16815

[Flanker32]

@wcom939 Thanks for your report, azure toolkit will run function core tools in a new process and close it when you close terminate the run configuration, but this may not work if you close intellij directly, will investigate how to kill the process in this case.

[Flanker32]

@justinyoo Thanks again for your help, this issue should be resolved in the latest release v3.62.0, beside we also support set the func port manually, could you please upgrade to the latest version and try again?

[no-response]

This issue has been closed automatically because it needs more information and has not had recent activity. Please reach out if you have or find the answers we need so that we can investigate further.