I have ELK setup and from I think working fine, trying to just simply 
import syslog data into it - can anyone help me with this? I am running 
Ubuntu 14.04 with the default syslog service built in and have also tried 
syslog-ng. I have verified data is getting to syslog by checking the 
/var/log/syslog. I have also verified elasticsearch/kibana is working by 
testing it with shakspeare JSON 
(http://www.elasticsearch.org/guide/en/kibana/current/using-kibana-for-the-first-time.html)


here is snippet of logstash log

itadmin@st-log:/opt/logstash$ tail -50 /var/log/logstash/logstash.log
        at 
org.elasticsearch.transport.netty.MessageChannelHandler.messageReceived(MessageChannelHandler.java:123)
        at 
org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
        at 
org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
        at 
org.elasticsearch.common.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
        at 
org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:296)
        at 
org.elasticsearch.common.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462)
        at 
org.elasticsearch.common.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443)
        at 
org.elasticsearch.common.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303)
        at 
org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
        at 
org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
        at 
org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
        at 
org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:268)
        at 
org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:255)
        at 
org.elasticsearch.common.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
        at 
org.elasticsearch.common.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
        at 
org.elasticsearch.common.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318)
        at 
org.elasticsearch.common.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
        at 
org.elasticsearch.common.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
        at 
org.elasticsearch.common.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
        at 
org.elasticsearch.common.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: java.io.InvalidClassException: failed to read class descriptor
        at 
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1603)
        at 
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
        at 
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1622)
        at 
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
        at 
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1622)
        at 
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
        at 
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1622)
        at 
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
        at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
        at 
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
        at 
org.elasticsearch.transport.netty.MessageChannelHandler.handlerResponseError(MessageChannelHandler.java:167)
        ... 23 more
Caused by: java.lang.ClassNotFoundException: 
org.elasticsearch.ElasticsearchException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        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 
org.jruby.util.JRubyClassLoader.findClass(JRubyClassLoader.java:128)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at 
org.elasticsearch.common.io.ThrowableObjectInputStream.loadClass(ThrowableObjectInputStream.java:93)
        at 
org.elasticsearch.common.io.ThrowableObjectInputStream.readClassDescriptor(ThrowableObjectInputStream.java:67)
        at 
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1601)
        ... 34 more
log4j, [2014-07-09T15:23:00.233]  WARN: org.elasticsearch.transport.netty: 
[Firelord] Message not fully read (response) for [78] handler 
org.elasticsearch.discovery.zen.ping.unicast.UnicastZenPing$4@25c8d6ed, 
error [true], resetting



here is logstash config


input {
        syslog {
        }
}
filter {
}
output {
  elasticsearch {
    host => "172.16.40.28"
  }
}

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