Mac的Mono FileSystemWatcher打开它监视的所有文件

Question

I am using Mono 4.6.2

When I create FileSystemWatcher to monitor a directory on Mac, it appears the watcher is opening all the files in that directory. I can see this in two ways:

1. when I open a large directory, it throws "too many open files" exception.

2. I can see all the files are listed under "Activity Monitor->Information->Open Files and Ports" for my program.

This is how I created my watcher:

var watcher = new FileSystemWatcher {
    Path = path.LocalPath,
    IncludeSubdirectories = true
};
watcher.NotifyFilter = NotifyFilters.CreationTime | NotifyFilters.FileName | 
                       NotifyFilters.DirectoryName | NotifyFilters.LastWrite;
watcher.Changed += FileSystemWatcher_Changed;
watcher.Renamed += FileSystemWatcher_Renamed;

Is it designed this way? Is there a workaround for this issue?

Answer 1

Take a look at this ticket #bugzilla.xamarin .

Workaround: run the GC for every iteration.

//Execute:
mcs test.cs
ulimit -n 96
mono test.exe