Lock File System Creator Semaphore Uninterruptibly

FileSystem "creator permits" are acquired in an interruptable way. This changed the behavior of the call because previous callers were handling the IOException as a critical error. An interrupt was handled in the typical InterruptedException way. Lastly, there was no documentation of this new event so again, callers are not prepared.

Restore the previous behavior and lock the semaphore Uninterruptibly.