RFR: 8293792: runtime/Dictionary/ProtectionDomainCacheTest.java fails with FileAlreadyExistsException: /tmp

[Alan Bateman]

On Wed, 14 Sep 2022 10:51:21 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> I could reproduce the issue with `Files.createDirectories` on a macos with a trivial program. It appears to be because of the use of `NOFOLLOW_LINKS` here https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/nio/file/Files.java#L808. To me this appears to be something that either needs to be clarified in the the `Files.createDirectories` API or addressed/fixed there. I have asked for inputs on this from others who have more knowledge of this area.

The specification is that symbolic links are followed by default, with a few exceptions (like delete and move) where it would be wrong to follow links. Files.createDirectories was originally intended to be like mkdir -p. We'd need to check the history but I suspect it is a long standing bug that createAndCheckIsDirectory opts out of following links.

-------------

PR: https://git.openjdk.org/jdk/pull/10266