Message "Cannot watch XXX, PID is already watched twice" in the journal

Solution Verified - Updated -

Issue

  • The following Warning message can be seen in the journal or in /var/log/messages

    # journalctl -b | grep "Cannot watch"
    [...] systemd[1]: Cannot watch XXX, PID is already watched twice
    

Environment

  • Red Hat Enterprise Linux 7
    • systemd

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