index does not exists when I do http://localhost:9200/rethinkdbname/rethinkdoc/_search?q=eMail:nikola about elasticsearch-river-rethinkdb HOT 3 CLOSED

I can see that elastics is ignoring plugin from log:

failed to load plugin from [file:/usr/share/elasticsearch/plugins/river-rethinkdb/es-plugin.properties]
org.elasticsearch.ElasticsearchException: Failed to load plugin class [org.elasticsearch.plugin.river.rethinkdb.RethinkDBRiverPlugin]
    at org.elasticsearch.plugins.PluginsService.loadPlugin(PluginsService.java:516)
    at org.elasticsearch.plugins.PluginsService.loadPluginsFromClasspath(PluginsService.java:397)
    at org.elasticsearch.plugins.PluginsService.(PluginsService.java:100)
    at org.elasticsearch.node.internal.InternalNode.(InternalNode.java:143)
    at org.elasticsearch.node.NodeBuilder.build(NodeBuilder.java:159)
    at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:68)
    at org.elasticsearch.bootstrap.Bootstrap.main(Bootstrap.java:201)
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:32)
Caused by: java.lang.UnsupportedClassVersionError: org/elasticsearch/plugin/river/rethinkdb/RethinkDBRiverPlugin : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at org.elasticsearch.plugins.PluginsService.loadPlugin(PluginsService.java:499)

from elasticsearch-river-rethinkdb.

My rethinkdb version is

 rethinkdb 2.2.5~0jessie (GCC 4.9.2) 

from elasticsearch-river-rethinkdb.

Sorry, i can see that this will not work with 2.2

from elasticsearch-river-rethinkdb.