adoptium / adoptium/adoptium-support

Files.readAttributes() will throw exception on WSL2 file ownership requests

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bug jbs:preexisting-issue keep reproducer windows
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Description

## Summary

On Windows 10 a call of _Files.readAttributes(path, "owner:*", LinkOption.NOFOLLOW_LINKS)_ in the special case where the _path_ is located on Windows Subsystem Linux 2 mapped network drive. will produce exception.

_java.nio.file.FileSystemException: U:\path_to_file\filename.ext: Incorrect function._

This case is related to Maven builds not running as expected as with the case descriptions here https://github.com/codehaus-plexus/plexus-io/issues/36

## Steps to reproduce

A call with _path.getFileSystem()_ returns object of type
sun.nio.fs.WindowsFileSystem

A call with _path.getFileSystem().supportedFileAttributeViews()_ returns
[owner, dos, acl, basic, user]

A call to _Files.readAttributes( path, "basic:*", LinkOption.NOFOLLOW_LINKS)_ returns
{
lastAccessTime=2021-01-26T12:37:41.11Z,
lastModifiedTime=2021-01-26T12:37:41.12Z,
size=2085,
creationTime=2021-01-26T12:37:41.11Z,
isSymbolicLink=false,
isRegularFile=true,
fileKey=null,
isOther=false,
isDirectory=false
}

When expecting that file ownership information is available running call _Files.readAttributes(path, "owner:*", LinkOption.NOFOLLOW_LINKS)_ will produce exception.

_java.nio.file.FileSystemException: U:\path_to_file\filename.ext: Incorrect function._

## Expected results

I would expect this to return _null_ or more subtle way. This case

## Actual results

_java.nio.file.FileSystemException: U:\path_to_file\filename.ext: Incorrect function._

## Triaging info

Java version:

openjdk version "11.0.10" 2021-01-19
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.10+9)
OpenJDK Client VM AdoptOpenJDK (build 11.0.10+9, mixed mode)

What is your operating system and platform?

Windows 10 Enterprise 2004 on x86-64

How did you install Java?

Unzipped zip file.

Did you test with other Java versions?

Tested with a little bit older AdoptOpenJDK 10.0.9.1+9 and results are the same.

Contributor guide

Open the contributing guide

Research direction

No repository files or tests are named. Start by reproducing Files.readAttributes(path, "owner:*", LinkOption.NOFOLLOW_LINKS) on a Windows 10 WSL2 mapped network drive and compare it with the working basic:* request. Done means the ownership request no longer throws FileSystemException and its unsupported-ownership behavior is defined.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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