Currently, in several tests, e.g., TestDataNodeVolumeFailureXXX and TestDataNotHowSwapVolumes, we simulate a disk failure by setting a directory's executable permission as false. However, it raises the risk that if the cleanup code could not be executed, the directory can not be easily removed by Jenkins job.
Since in DiskChecker#checkDirAccess:
We can replace the DN data directory as a file to achieve the same fault injection goal, while it is safer for cleaning up in any circumstance. Additionally, as Chris Nauroth suggested:
That might even let us enable some of these tests that are skipped on Windows, because Windows allows access for the owner even after permissions have been stripped.