@Michael Bronson Can you please share the complete AMS collector logs .. along with the HMaster log which you can find in the same directory where the AMS collector log is present. Do you have enough free memory available on your system (where AMS is running) Also can you please share the cluster node numbers present in your cluster? based on that we can try to find if the Heap settings for AMS collector and HMaster are OK or not? Also let us know if your AMS collector is running in Embedded Mode or Distributed Mode? Looking at collector-gc.log and gc.log (fopr hmaster process can be also good). What is the Ambari Version and the output of the following command (Any recent ambari upgrade performed recently?) When was the AMS running fine last time? Any recent changes made to ams configs? # rpm -qa | grep ambari . ... View more

@Weiss Ruth This HCC thread looks duplicate of another one. As per HCC recommendations for the same issue please open only one thread so that all the relevant answers can be found on one thread. https://community.hortonworks.com/questions/232181/sign-in-with-root-user.html?childToView=232212#answer-232212 . Copying my response from other thread: Please make sure that you are using the correct SSH port to connect to the Sandbox. The port will be 2222 something like following: # ssh root@127.0.0.1 -p 2222 Enter password : hadoop . Or you can also use the Web Client to do SSH login to sandbox like by accessing the following URL. http://localhost:4200 ... View more

@PJ Last 7 Days of Memory For Yarn Queues : 1. Allocated Memory of "default" queue: http://$AMS_COLLECTOR_HOSTNAME:6188/ws/v1/timeline/metrics?metricNames=yarn.QueueMetrics.Queue=root.default.AllocatedMB._max&appId=resourcemanager&startTime=1545612799&endTime=1546217599 2. Reserved Memory of "default" queue: http://$AMS_COLLECTOR_HOSTNAME:6188/ws/v1/timeline/metrics?metricNames=yarn.QueueMetrics.Queue=root.default.default.ReservedMB._max&appId=resourcemanager&startTime=1545612890&endTime=1546217690 3. Pending Memory of "default" queue: http://$AMS_COLLECTOR_HOSTNAME:6188/ws/v1/timeline/metrics?metricNames=yarn.QueueMetrics.Queue=root.default.AllocatedMB._max&appId=resourcemanager&startTime=1545612940&endTime=1546217740 4. Available Memory of "default" queue http://$AMS_COLLECTOR_HOSTNAME:6188/ws/v1/timeline/metrics?metricNames=yarn.QueueMetrics.Queue=root.default.AvailableMB._max&appId=resourcemanager&startTime=1545613074&endTime=1546217874 Please replace the following in the above queries: 1. "AMS_COLLECTOR_HOSTNAME:6188" with your Ambari Metrics Collector Hostname and port (default port is 6188) 2. Name of the queue "default" with the name of your own queue which you want to monitor. 3. Change the StartTime and endTime in the query to cover last 7 days. You can use some online tool to generate the EPOC time like https://www.epochconverter.com/ Make sure that the generated epooc time is in milliseconds like 10 digits. . ... View more