Changing the default file system provider is broken :(

Alan Bateman Alan.Bateman at
Sun Apr 23 10:38:21 UTC 2017

On 22/04/2017 21:48, Peter Levart wrote:

> Well, it works at least when 
> -Djava.nio.file.spi.DefaultFileSystemProvider=... is specified on the 
> command line. But when the system property is set as 1st thing in 
> main() method, it is already too late. It seems that after boot 
> sequence is finished (VM.isBooted() == true)and before main() method 
> is called, some code needs the FileSystem again, so default file 
> system is already initialized before the main() is executed.
> Perhaps there needs to be another initLevel which would be set just 
> before the invocation of the main() method?
I don't think we go there as there are just too many scenarios where 
"user code" can execute before the application main method. Instead, I 
think this is a case where the default file system provider can only be 
overridden by setting the property on the command line.


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