We recently patched Linux servers (RHEL 7.4). As a part of the patching we upgraded openSSL libraries (from 1.0.1e-60.el7_3.1.x86_64 to 1.0.2k-8.el7.x86_64). After completing the process, we saw Heartbeat Lost message in Ambari UI. When I tried to run ambari-agent restart command and got this message in log file:
Good to know that the link was useful to you and it resolved your issue. It will be great if you can mark this thread as "Accepted" (Answered) that way it will be very easy for other HCC users to quickly browse the answered threads.