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java.util.concurrent.TimeoutException: null at com.ning.http.client.providers.netty.future.NettyResponseFuture.get(NettyResponseFuture.java:159)[com.ning.async-http-client-1.9.31.jar:na] at org.graylog2.restclient.lib.ApiClientImpl$ApiRequestBuilder.executeOnAll(ApiClientImpl.java:608)[org.graylog2.graylog2-rest-client--1.2.2-1.2.2.jar:na] at controllers.api.MetricsController$PollingJob.run(MetricsController.java:117)[graylog-web-interface.graylog-web-interface-1.2.2.jar:1.2.2] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[na:1.8.0_66] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)[na:1.8.0_66] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)[na:1.8.0_66] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)[na:1.8.0_66] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[na:1.8.0_66] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[na:1.8.0_66] at java.lang.Thread.run(Thread.java:745)[na:1.8.0_66]