We solved the issue. Looks like it is a ulimit related problem.   We raised user limits under  /etc/security/limits.d/     And then we created a file under  /etc/systemd/system/cloudera-scm-agent.service.d/override.conf To override service-level limits   And we raised the value  echo "65536" > /sys/fs/cgroup/pids/system.slice/cloudera-scm-agent.service/pids.max (instead of rebooting). ... View more