@qi @Qi Wang I had a similar problem with the yarn resource manager running on master 2 not being able to connect to yarn App timeline server running on master 3. I moved yarnApp timeline server to master 2 and it works fine now. But just wanted to check does Apptimeline server have to be on the same node as as yarn rm or How are the three components related App timeline server, YARN RM and History server ? Error logs resource_management.core.exceptions.Fail: Execution of 'yarn org.apache.hadoop.yarn.applications.distributedshell.Client -shell_command ls -num_containers 1 -jar /usr/hdp/current/hadoop-yarn-client/hadoop-yarn-applications-distributedshell.jar -jar /usr/hdp/current/hadoop-yarn-client/hadoop-yarn-applications-distributedshell.jar -timeout 300000' returned 2. 16/05/02 15:44:15 INFO impl.TimelineClientImpl: Timeline service address: http://master3.com:8188/ws/v1/timeline/ ... View more