elasticsearch RemoteTransportException on dedicated server

Question

i am trying to integrate elasticsearch with production but getting the following exception. jvm i am using in both server 1.7.0_40

2015-01-12 21:29:06 DEBUG netty:94 - [Whitemane, Aelfyre] connected to node [[#transport#-1][inet[/xxx.xxx.xx.xxx:9300]]] 2015-01-12 21:29:06 WARN netty:114 - [Whitemane, Aelfyre] Message not fully read (response) for [63] handler future(org.elasticsearch.client.transport.TransportClientNodesService$SimpleNodeSampler$1@4e70a141), error [true], resetting 2015-01-12 21:29:06 INFO transport:109 - [Whitemane, Aelfyre] failed to get node info for [#transport#-1][inet[/xxx.xxx.xx.xxx:9300]], disconnecting... org.elasticsearch.transport.RemoteTransportException: Failed to deserialize exception response from stream Caused by: org.elasticsearch.transport.TransportSerializationException: Failed to deserialize exception response from stream at org.elasticsearch.transport.netty.MessageChannelHandler.handlerResponseError(MessageChannelHandler.java:171) at org.elasticsearch.transport.netty.MessageChannelHandler.messageReceived(MessageChannelHandler.java:125) at org.elasticsearch.common.netty.channel .SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70) at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560) at org.elasticsearch.common.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787) 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:560) at org.elastics earch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:555) 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:107) at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312) at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:88) 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$1.run(DeadLockProofWorker.java:42) at java.util.concurrent.ThreadPo olExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) Caused by: java.io.InvalidClassException: failed to read class descriptor at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1601) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1515) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1620) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1515) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1620) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1515) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1620) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1515) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348) at java.io.Objec tInputStream.readObject(ObjectInputStream.java:370) at org.elasticsearch.transport.netty.MessageChannelHandler.handlerResponseError(MessageChannelHandler.java:169) ... 23 more Caused by: java.lang.ClassNotFoundException: org.elasticsearch.ElasticsearchException at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 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:1599) ... 34 more

Answer 1

Judging by the root exception java.lang.ClassNotFoundException: org.elasticsearch.ElasticsearchException and whatever you integrate Elasticsearch with ( integrate elasticsearch with production ) I am guessing that either:

• you are missing elasticsearch.jar from the classpath of your "production" system or you assume it's in classpath but, in fact, it isn't
• you are using different Elasticsearch versions (the server has one version, your "production" system uses an ES jar from another version

In Elasticsearch 0.20.5 this is the class in question: https://github.com/elasticsearch/elasticsearch/blob/v0.20.5/src/main/java/org/elasticsearch/ElasticSearchException.java . Notice the name of the class - ElasticSearchException (capital letter "S").

In Elasticsearch 1.4.2 the class name is changed: https://github.com/elasticsearch/elasticsearch/blob/v1.4.2/src/main/java/org/elasticsearch/ElasticsearchException.java . Notice the name of the class - ElasticsearchException (lower case "s").

So, you really need to use the same Elasticsearch version on both your servers.