Installed the Java JRE - now recieving errors

Morning, I am having a issue. I installed JRE on the system and now I am having this error thrown when performing service logstash configtest;

service logstash configtest
The given configuration is invalid. Reason: Expected one of #, input, filter, output at line 34, column 1 (byte 863) after {:level=>:fatal}


You have a syntax problem on line 34 of one of your configuration files?