NiFi Bulletin Board reports following error:
AmbariReportingTask [id=aaaaec9a-015e-1000-ffff-ffffcfe6cfd2] Error sending metrics to Ambari due to 500
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><RemoteException><exception>WebApplicationException</exception><javaClassName>javax.ws.rs.WebApplicationException</javaClassName></RemoteException>
ambari-server.log
6 Jan 2018 16:21:49,701 ERROR [ambari-metrics-retrieval-service-thread-1797] MetricsRetrievalService:492 - Unable to retrieve metrics from http://NODE1:8744/api/v1/cluster/summary. Subsequent failures will be suppressed from the log for 20 minutes.
java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
at sun.net.www.http.HttpClient.New(HttpClient.java:308)
at sun.net.www.http.HttpClient.New(HttpClient.java:326)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1202)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1138)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1032)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:966)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1546)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at org.apache.ambari.server.controller.internal.URLStreamProvider.processURL(URLStreamProvider.java:218)
at org.apache.ambari.server.controller.internal.URLStreamProvider.processURL(URLStreamProvider.java:142)
at org.apache.ambari.server.controller.internal.URLStreamProvider.readFrom(URLStreamProvider.java:116)
at org.apache.ambari.server.controller.internal.URLStreamProvider.readFrom(URLStreamProvider.java:121)
at org.apache.ambari.server.state.services.MetricsRetrievalService$MetricRunnable.run(MetricsRetrievalService.java:438)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
