The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

2.2.31 RHCK panics when ext4 file system defragmented

Under certain conditions, RHCK can panic if an ext4 file system is defragmented. (Bug ID 21163148)