java/util/Locale/SoftKeys.java has @ignore tag w/ the following description:
 * @ignore This test aims to provoke NPEs, but due to the need to constrain
 * memory usage it fails intermittently with OOME on various systems
 * with no way to ignore such failures.

canonically, @ignore should be followed by the id of the bug which describes the problem and will be used to eventually fix it.

assuming that this test can't be run in an automated testing environment, a more appropriate solution would be to use '/manual' option, so the test will be excluded from regular/automated execution, yet still will be easy to discover and run in manual runs.