Elasticsearch：在传输层捕获异常

Question

将 Elasticsearch 从版本 1.6 升级到 2.1 后，我在 Java 应用程序中看到一个错误。

该应用程序以前使用 Java，但现在连接立即终止，结果在应用程序中抛出类似的错误 (org.elasticsearch.client.transport.NoNodeAvailableException)。

这一切都发生在第一次连接尝试期间，这表明版本之间存在冲突，但也可能是其他原因。

具体是什么问题，除了换版本还有什么办法可以解决吗？

elasticsearch.log:

[2015-12-08 17:42:54,035][WARN ][transport.netty          ] [Lorna Dane] exception caught on transport layer [[id: 0x9f75ad33, /192.168.0.208:21248 => /192.168.0.140:9300]], closing connection
java.lang.IllegalStateException: Message not fully read (request) for requestId [0], action [cluster/nodes/info], readerIndex [39] vs expected [57]; resetting
        at org.elasticsearch.transport.netty.MessageChannelHandler.messageReceived(MessageChannelHandler.java:120)
        at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
        at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
        at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
        at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
        at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462)
        at org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443)
        at org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303)
        at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
        at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
        at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
        at org.elasticsearch.common.netty.OpenChannelsHandler.handleUpstream(OpenChannelsHandler.java:75)
        at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
        at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
        at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
        at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
        at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
        at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
        at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
        at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
        at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
        at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
        at org.jboss.netty.util.internal.DeadLockProofWorker.run(DeadLockProofWorker.java:42)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

Java 控制台：

Exception in thread "main" org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: []
    at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:298)
    at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:214)
    at org.elasticsearch.client.transport.support.InternalTransportClusterAdminClient.execute(InternalTransportClusterAdminClient.java:85)
    at org.elasticsearch.client.support.AbstractClusterAdminClient.state(AbstractClusterAdminClient.java:138)
    at org.elasticsearch.action.admin.cluster.state.ClusterStateRequestBuilder.doExecute(ClusterStateRequestBuilder.java:94)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:91)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:65)

Answer 1

确保 elasticsearch 客户端库 jar 与集群版本保持同步。

例如使用 Maven 时：

 <dependency>
      <groupId>org.elasticsearch</groupId>
      <artifactId>elasticsearch</artifactId>
      <version>2.1.0</version>
 </dependency>

Answer 2

任何 >2.x Elasticsearch 实例都会发生这种情况，只要仍然有 1.x 机器在同一网络上寻找集群（它发送错误的协议信息）。从技术上讲，您可以忽略它（它只是让您知道 1.x 机器尝试连接但连接无效），但是如果您不理它太久，您的日志可能会填满等等。

最佳解决方案是将旧 1.x 节点与新节点隔离，直到完成升级。

参见：https://github.com/elastic/elasticsearch/issues/14400

Elasticsearch：在传输层捕获异常

Elasticsearch: exception caught on transport layer

java

jboss

parsing

transport

elasticsearch