Warning message "kernel:overlayfs: Warning: Copying up xxx, but open R/O on fd x which will cease to be coherent [pid=xxx xxx]" logged upon containerized JBoss restart.

Solution Verified - Updated -

Issue

  • The below warning is logged in /var/log/messages file upon docker containerized JBoss restart.
Feb 24 19:09:23 <kern.warning> localhost kernel:overlayfs: Warning: Copying up jboss-modules.jar, but open R/O on fd 5 which will cease to be coherent [pid=xxx java]

Environment

  • Red Hat Enterprise Linux 7.3 and newer
  • Docker containerized applications
  • OverlayFS

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