How to track who/what is sending SIGKILL to a process?

Solution Unverified - Updated -

Issue

We are investigating an issue with processes that are suddenly dying, and we have determined that the process receives a SIGKILL signal.
However there is no log message explaining more about the reason of the kill. How can we check who sends kill signal to the process?

Environment

  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

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