Sorry I did not see where was the description field 
. I tried to search a similar issue, but did not find any, so maybe something wrong is on my config ?
After I start with -Djavax.net.ssl.keyStore=/srv/certificados/zabbix.jks -Djavax.net.ssl.keyStorePassword=XXX -Djavax.net.ssl.trustStore=/srv/certificados/zabbix.jks -Djavax.net.ssl.trustStorePassword=XXX
zabbix_java tries to connect to localhost, I have not any java process to monitorice on localhost (at least now)
2016-04-26 18:11:22.103 [main] INFO com.zabbix.gateway.JavaGateway - Zabbix Java Gateway 2.4.6 (revision 54796) has started 2016-04-26 18:11:22.129 [main] INFO com.zabbix.gateway.JavaGateway - listening on 0.0.0.0/0.0.0.0:10052 2016-04-26 18:12:12.836 [pool-1-thread-1] WARN com.zabbix.gateway.SocketProcessor - error processing request com.zabbix.gateway.ZabbixException: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Conexión rehusada at com.zabbix.gateway.JMXItemChecker.getValues(JMXItemChecker.java:97) ~[zabbix-java-gateway-2.4.6.jar:na] at com.zabbix.gateway.SocketProcessor.run(SocketProcessor.java:63) ~[zabbix-java-gateway-2.4.6.jar:na] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_65] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_65] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_65] Caused by: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Conexión rehusada at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619) ~[na:1.8.0_65] at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216) ~[na:1.8.0_65] at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202) ~[na:1.8.0_65] at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:130) ~[na:1.8.0_65] at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source) ~[na:1.8.0_65] at javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2432) ~[na:1.8.0_65] at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:308) ~[na:1.8.0_65] at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:270) ~[na:1.8.0_65] at com.zabbix.gateway.ZabbixJMXConnectorFactory$1.run(ZabbixJMXConnectorFactory.java:76) ~[zabbix-java-gateway-2.4.6.jar:na] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_65] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_65] ... 3 common frames omitted Caused by: java.net.ConnectException: Conexión rehusada at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_65] at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_65] at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_65] at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_65] at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_65] at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_65] at java.net.Socket.connect(Socket.java:538) ~[na:1.8.0_65] at java.net.Socket.<init>(Socket.java:434) ~[na:1.8.0_65] at java.net.Socket.<init>(Socket.java:211) ~[na:1.8.0_65] at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40) ~[na:1.8.0_65] at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148) ~[na:1.8.0_65] at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613) ~[na:1.8.0_65] ... 13 common frames omitted
Thank you
this looks more like a support request - please see http://zabbix.org/wiki/Getting_help for options
Closing as "Won't fix" as per the comment above.
I have just created a post on forum, I don't understand why zabbix_java is trying to connect to localhost
https://www.zabbix.com/forum/showthread.php?p=182341#post182341
Thank you