defunct child process with ChromelyApp on linux

[jirinalepa]

Can be reproduced on CrossPlatDemo Project. Started processes ends correctly, until Chromely starts.

Just insert this code to Program.cs before AppBuilder.....Run().

var tokenSource = new CancellationTokenSource();
var task = Task.Run(async () =>
{
    var cmd = new string[] { "ls", "-l" };
    while (!tokenSource.Token.IsCancellationRequested)
    {
        try
        {
            cmd.RunShell();
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex);
        }
        await Task.Delay(1000);
    }
});

And RunShell() is defined as:

public static string RunShell(this IEnumerable cmdAndArgs, int timeout = 5000)
{
    var result = string.Empty;
    var cmd = cmdAndArgs.FirstOrDefault();

    if (string.IsNullOrWhiteSpace(cmd))
        return string.Empty;

    using (var process = new Process())
    {
        process.EnableRaisingEvents = true;
        process.StartInfo = new ProcessStartInfo
        {
            FileName = cmd,
            RedirectStandardOutput = true,
            UseShellExecute = false
        };
        foreach (var arg in cmdAndArgs.Skip(1))
            process.StartInfo.ArgumentList.Add(arg);
        process.Start();

        result = process.StandardOutput.ReadToEnd();
        if (timeout > 0)
        {
            if (!process.WaitForExit(timeout))
                Console.WriteLine($"ERR: '{string.Join(' ', cmdAndArgs)}' process doesn't exited.");
            else
                Console.WriteLine($"OKK: '{string.Join(' ', cmdAndArgs)}' exited properly.");
        }
        else
        {
            process.WaitForExit();
        }
        process.Kill(true);
    }

    return result;
}

[mattkol]

@jirinalepa this is not directly related to Chromely. CEF is a multi-process, so what you are trying to do may be impacted by that. What we have done with mvc and single instance may be helpful: web-chromely-mvc Single Instance

[jirinalepa]

Thanks for the directions. Although it did not completely solve the problem, at least it inspired me to find a workaround.