ADDITIONAL SYSTEM INFORMATION :
Windows 10
Windows 11

OneDrive

GraalVM 11.0.12
Zulu 11.52.13
Not tested, but from reading the source bug also seems present in OpenJDK 17 as well.




A DESCRIPTION OF THE PROBLEM :
When calling Files.listfiles(...) cloud only files are automatically downloaded to local storage.

At Line ~168 of sun.nio.fs.WindowsChannelFactory the following line opens the file handle.

FileDescriptor fdObj = open(pathForWindows, pathToCheck, flags, pSecurityDescriptor);

It's missing the FILE_FLAG_OPEN_NO_RECALL flag as noted in the win32 api.

https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilea

The flag is missing from sun.nio.fs.WindowsConstants as well.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run java.nio.file.Files.listFiles on any folder in OneDrive with files that are not stored locally.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
A listing of files in the directory.
ACTUAL -
A listing of files in the directory with each remote file forced to download.

---------- BEGIN SOURCE ----------
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;


public class NIOProblem {
    public static void main(String[] args) throws IOException {
        //This assumes windows with one drive remote files
        //(may affect other storage systems using the same api idk)
        Files.list(Path.of(System.getProperty("user.home"), "OneDrive"));
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Not using java.nio.file.Files.listFiles() to list files.
Using java.​io.​File.listFiles() instead.

FREQUENCY : always