Issue

• We upgraded our cluster to 3.5, and want to know how to upgrade logging-fluentd.

• I tried upgrading logging-es by updating the deployment config, but getting the below listed error:

Exception in thread "main" java.lang.RuntimeException: Unable to load index mapping for io.fabric8.elasticsearch.kibana.mapping.app. The key was not in the settings or it specified a file that does not exists.    
    at io.fabric8.elasticsearch.plugin.kibana.IndexMappingLoader.loadMapping(IndexMappingLoader.java:56) 
    at io.fabric8.elasticsearch.plugin.kibana.IndexMappingLoader.<init>(IndexMappingLoader.java:40) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
    at <<<guice>>> 
    at org.elasticsearch.node.Node.<init>(Node.java:213) 
    at org.elasticsearch.node.Node.<init>(Node.java:140) 
    at org.elasticsearch.node.NodeBuilder.build(NodeBuilder.java:143) 
    at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:194) 
    at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:286) 
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:45)