Re: Race condition in Linux::Inotify2 between dir and new file?

Given that your issue is XML::LibXML is trying to read an empty file, perhaps you could use -s to test for non-zero size, and institute a waiting loop until it passes that condition? Something like:

sub process_drop_file {
    my $file = Path::Class::File->new(shift);
    -f $file or croak "'$file' is not a file";
    sleep(1) until (-s $file);                 # <-- New line
    my $doc = XML::LibXML->new->parse_file("$file");
    # Do stuff with it...
    $file->remove or croak "Couldn't remove '$file'";
}
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Comment on Re: Race condition in Linux::Inotify2 between dir and new file? Download Code

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Re^2: Race condition in Linux::Inotify2 between dir and new file? by Your Mother (Archbishop) on Jun 24, 2009 at 23:02 UTC
I am still hoping there is an event or setting solution but if not the `-s` check is probably a good approach and I may do just that (with a max_check saftey valve or something in case a real 0 size file comes through). Thanks.	[reply] [d/l]
Re^2: Race condition in Linux::Inotify2 between dir and new file? by spx2 (Deacon) on Jun 25, 2009 at 09:29 UTC
what if in that second those seconds that you're sleeping waiting for the size of the file to grow, some other files are created in the directory watched ? will Iotify2 call process_drop_file for those also ? maybe starting 2 threads , one which puts them in a queue and the other which reads them from a queue would be more appropriate to not skip(unintentionally) any of them	[reply]