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(Updated July 25, 2016, 5:12 p.m.) Review request for Ambari, Alejandro Fernandez, Myroslav Papirkovskyy, Nate Cole, and Robert Levas. Changes ------- new patch Bugs: AMBARI-17878 https://issues.apache.org/jira/browse/AMBARI-17878 Repository: ambari Description ------- *add service operation hangs in Preparing to execute Set Keytab* 1. install ambari2.4.0 with stack 2.4 2. express upgrade to stack 2.5 3. finalize the upgrade 4. add new services ( kms,atlas,slider) Null pointer exception is thrown in ambari-server logs {code} 18 Jul 2016 07:12:32,025 ERROR [ambari-metrics-retrieval-service-thread-105] MetricsRetrievalService:421 - Unable to retrieve metrics from http://host:8744/api/v1/cluster/summary. Subsequent failures will be suppressed from the log for 5 minutes. java.net.ConnectException: 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:1169) at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933) at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441) 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$MetricRunnable.run(MetricsRetrievalService.java:382) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) {code} {code} 18 Jul 2016 07:42:39,979 WARN [ambari-action-scheduler] ActionScheduler:202 - Exception received java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.ambari.server.agent.ActionQueue.getQueue(ActionQueue.java:52) at org.apache.ambari.server.agent.ActionQueue.enqueue(ActionQueue.java:61) at org.apache.ambari.server.actionmanager.ActionScheduler.cancelCommandOnTimeout(ActionScheduler.java:1084) at org.apache.ambari.server.actionmanager.ActionScheduler.processInProgressStage(ActionScheduler.java:725) at org.apache.ambari.server.actionmanager.ActionScheduler.doWork(ActionScheduler.java:290) at org.apache.ambari.server.actionmanager.ActionScheduler.run(ActionScheduler.java:197) at java.lang.Thread.run(Thread.java:745) {code} Note: this is an upgraded cluster from hdp-2.4 to hdp-2.5 , addition of the service is done after upgrade. Diffs (updated) ----- ambari-server/src/main/java/org/apache/ambari/server/actionmanager/ActionScheduler.java 90ffa5b ambari-server/src/main/java/org/apache/ambari/server/agent/ActionQueue.java 24640d3 ambari-server/src/test/java/org/apache/ambari/server/actionmanager/TestActionScheduler.java 0b24765 Diff: https://reviews.apache.org/r/50390/diff/ Testing ------- mvn clean test Thanks, Dmitro Lisnichenko