Queue requests - com.mashape.unirest.http.exceptions.UnirestException

[leoqa]

Jenkins version: 2.164.3
Statistics Gatherer version: 2.0.3
CentOS 7.x

Also logged as I'm not sure where to log the issue: https://issues.jenkins-ci.org/browse/JENKINS-59270

When the plugin is sending 'queue' requests to Logstash, we are seeing the following messages in the Jenkins log:

The request for url http://logstashserver:5000/jenkins_queue/ has failed. org.apache.http.ConnectionClosedException: Connection closed Caused: com.mashape.unirest.http.exceptions.UnirestException at com.mashape.unirest.http.HttpClientHelper$1.failed(HttpClientHelper.java:86) at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:134) at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.failed(DefaultClientExchangeHandlerImpl.java:258) at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.connectionAllocated(DefaultClientExchangeHandlerImpl.java:305) at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.access$000(DefaultClientExchangeHandlerImpl.java:63) at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl$1.completed(DefaultClientExchangeHandlerImpl.java:360) at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl$1.completed(DefaultClientExchangeHandlerImpl.java:357) at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:119) at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalPoolEntryCallback.completed(PoolingNHttpClientConnectionManager.java:465) at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalPoolEntryCallback.completed(PoolingNHttpClientConnectionManager.java:449) at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:119) at org.apache.http.nio.pool.AbstractNIOConnPool.fireCallbacks(AbstractNIOConnPool.java:443) at org.apache.http.nio.pool.AbstractNIOConnPool.lease(AbstractNIOConnPool.java:276) at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.requestConnection(PoolingNHttpClientConnectionManager.java:261) at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.requestConnection(DefaultClientExchangeHandlerImpl.java:351) at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.start(DefaultClientExchangeHandlerImpl.java:126) at org.apache.http.impl.nio.client.InternalHttpAsyncClient.execute(InternalHttpAsyncClient.java:129) at org.apache.http.impl.nio.client.CloseableHttpAsyncClient.execute(CloseableHttpAsyncClient.java:72) at org.apache.http.impl.nio.client.CloseableHttpAsyncClient.execute(CloseableHttpAsyncClient.java:102) at org.apache.http.impl.nio.client.CloseableHttpAsyncClient.execute(CloseableHttpAsyncClient.java:87) at com.mashape.unirest.http.HttpClientHelper.requestAsync(HttpClientHelper.java:102) at com.mashape.unirest.request.BaseRequest.asJsonAsync(BaseRequest.java:76) at org.jenkins.plugins.statistics.gatherer.util.RestClientUtil.postToService(RestClientUtil.java:32) at org.jenkins.plugins.statistics.gatherer.listeners.QueueStatsListener.onLeft(QueueStatsListener.java:222) at hudson.model.Queue$LeftItem.enter(Queue.java:2777) at hudson.model.Queue.onStartExecuting(Queue.java:1163) at hudson.model.Executor$1.call(Executor.java:361) at hudson.model.Executor$1.call(Executor.java:347) at hudson.model.Queue._withLock(Queue.java:1440) at hudson.model.Queue.withLock(Queue.java:1301) at hudson.model.Executor.run(Executor.java:347