title: jenkins logstash-plugin unable to post to elasticSearch
body: <p>I've installed the logstash-plugin for jenkins and configured it to use the indexer as elastic search.</p>
  
  <p>While executing the jobs I see the following error:</p>
  
  <pre><code>16:56:12 [logstash-plugin]: Failed to send log data to ELASTICSEARCH:http://localhost:9200.
  16:56:12 [logstash-plugin]: No Further logs will be sent to http://localhost:9200.
  16:56:12 java.io.IOException: HTTP error code: 200
  16:56:12 URI: http://localhost:9200/logstash-jenkins
  16:56:12 RESPONSE: HttpResponseProxy{HTTP/1.1 200 OK [Content-Type:     application/json; charset=UTF-8, Content-Length: 21] ResponseEntityProxy{[Content-Type: application/json; charset=UTF-8,Content-Length: 21,Chunked: false]}}
  16:56:12 {"acknowledged":true}
  16:56:12    at jenkins.plugins.logstash.persistence.ElasticSearchDao.push(ElasticSearchDao.java:113)
  16:56:12    at jenkins.plugins.logstash.LogstashWriter.write(LogstashWriter.java:147)
  16:56:12    at jenkins.plugins.logstash.LogstashWriter.write(LogstashWriter.java:85)
  16:56:12    at jenkins.plugins.logstash.LogstashOutputStream.eol(LogstashOutputStream.java:58)
  16:56:12    at hudson.console.LineTransformationOutputStream.eol(LineTransformationOutputStream.java:60)
  16:56:12    at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:56)
  16:56:12    at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:74)
  16:56:12    at java.io.PrintStream.write(PrintStream.java:480)
  16:56:12    at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
  16:56:12    at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291)
  16:56:12    at sun.nio.cs.StreamEncoder.flushBuffer(StreamEncoder.java:104)
  16:56:12    at     java.io.OutputStreamWriter.flushBuffer(OutputStreamWriter.java:185)
  16:56:12    at java.io.PrintStream.newLine(PrintStream.java:546)
  16:56:12    at java.io.PrintStream.println(PrintStream.java:807)
  16:56:12    at hudson.model.Cause$UserIdCause.print(Cause.java:426)
  16:56:12    at     hudson.model.StreamBuildListener.started(StreamBuildListener.java:75)
  16:56:12    at hudson.model.Run.execute(Run.java:1723)
  16:56:12    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
  16:56:12    at     hudson.model.ResourceController.execute(ResourceController.java:98)
  16:56:12    at hudson.model.Executor.run(Executor.java:410)
  </code></pre>
  
  <p>Would appreciate any clues on how I can fix this error.</p>
  
  <p>Thanks
  - Prateek</p>