Files.isWritable returning false for network paths

[nsrg]

Please provide a brief summary of the bug

We are using openjdk version "17.0.6" 2023-01-17. OpenJDK 64-Bit Server VM Temurin-17.0.6+10 (build 17.0.6+10, mixed mode, sharing) in windows machine.

For a network samba shared path, Files.isWritable is returning false. Actually I have full access to the path. I am able to create subdirectory and files using command prompt / explorer.

I also observer path.toFile().canWrite() returns true for that shared path.

We have issues wherver we use Files.isWritable for network shared paths

Please provide steps to reproduce where possible

package Testing;

import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths;

public class FilesIsWritableTest { public static void main(String[] args) {

	String f1 = "x:/yylmssysdm/zzzz";
	Path p = Paths.get(f1);

	System.out.println(Files.isWritable(p));
	System.out.println(p.toFile().canWrite());

}

}

Expected Results

true true

Actual Results

false true

What Java Version are you using?

OpenJDK Runtime Environment Temurin-11.0.17+8 (build 11.0.17+8)

What is your operating system and platform?

Microsoft Windows [Version 10.0.19045.2604]

How did you install Java?

MSI

Did it work before?

No

Did you test with the latest update version?

Yes

Did you test with other Java versions?

Tested with Java 17 also. Fails there

Relevant log output

No response

[nsrg]

Java version is OpenJDK Runtime Environment Temurin-17.0.6+10 (build 17.0.6+10)

[karianna]

Looks like https://bugs.openjdk.org/browse/JDK-8154915?jql=text%20~%20%22Files.isWritable%22

[jerboaa]

https://bugs.openjdk.org/browse/JDK-8154915 has this ask:

It would be useful if the submitter could try Files.readAttributes(path, BasicFileAttributes.class) and
report back so to whether it succeeds or throws exception. If there is an exception then it might
reveal an issue in the environment.

[karianna]

@nsrg ^^

[nsrg]

https://bugs.openjdk.org/browse/JDK-8154915 has this ask:

It would be useful if the submitter could try Files.readAttributes(path, BasicFileAttributes.class) and
report back so to whether it succeeds or throws exception. If there is an exception then it might
reveal an issue in the environment.

Tried Files.readAttributes(path, BasicFileAttributes.class) ; It does does not throw exception.

[github-actions[bot]]

We are marking this issue as stale because it has not been updated for a while. This is just a way to keep the support issues queue manageable. It will be closed soon unless the stale label is removed by a committer, or a new comment is made.