The software described in this documentation is either in Extended Support or Sustaining Support. See for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

2.2.7 btrfs: Empty symbolic link after fsync of parent directory

If a symbolic link is created and the parent directory is fsynced, a system crash or power outage results in an empty symbolic link when the file system is remounted. (Bug ID 23748445)