Feb 11 13:54:35 iganagioslog02 systemd: Starting LSB: Logstash...
Feb 11 13:54:35 iganagioslog02 logstash: Starting Logstash Daemon: WARNING: Default JAVA_OPTS will be overridden by the JAVA_OPTS defined in the environment. Environment JAVA_OPTS are -Djava.io.tmpdir=/usr/local/nagioslogserver/tmp
Feb 11 13:54:35 iganagioslog02 logstash: /bin/java: error while loading shared libraries: libjli.so: cannot open shared object file: No such file or directory
Feb 11 13:54:35 iganagioslog02 logstash: /etc/rc.d/init.d/logstash: line 99: [: 8159: unary operator expected
Feb 11 13:54:35 iganagioslog02 systemd: Started LSB: Logstash.
Feb 11 13:54:39 iganagioslog02 systemd: Stopping LSB: This service manages the elasticsearch daemon...
Feb 11 13:54:39 iganagioslog02 systemd: Starting LSB: This service manages the elasticsearch daemon...
Feb 11 13:54:39 iganagioslog02 elasticsearch: Starting elasticsearch: /bin/java: error while loading shared libraries: libjli.so: cannot open shared object file: No such file or directory
Feb 11 13:54:39 iganagioslog02 elasticsearch: [ OK ]
Feb 11 13:54:39 iganagioslog02 systemd: Started LSB: This service manages the elasticsearch daemon.
I got this same thing yesterday, removed and reinstalled java and it seemed to have fixed it... At least the web interface would come up and cluster status said it was good. No nothing....
If none of those work, I want to suggest you send a ticket in, and we do a remote session to look at this issue. If possible, you may want to restore from a VM snapshot before you made any java modifications.. that could really be messing with it.