HI, I recently upgraded from HDP 2.3.2 to HDP 2.4.2 on a secure cluster. When I try to start MR History server, yarn Timeline service and HBase master service, all three are throwing the same error as failed to obtain user group information: java.io.IOException: Usernames not matched: name=hdfs != expected=hdfs-REALM Below is the stacktrace: File "/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py", line 195, in run_command raise Fail(err_msg) resource_management.core.exceptions.Fail: Execution of 'curl -sS -L -w '%{http_code}' -X GET --negotiate -u : 'http://znlhacdt0002.amer.zurich.corp:50070/webhdfs/v1/app-logs?op=GETFILESTATUS&user.name=hdfs'' returned status_code=403. { "RemoteException": { "exception": "SecurityException", "javaClassName": "java.lang.SecurityException", "message": "Failed to obtain user group information: java.io.IOException: Usernames not matched: name=hdfs != expected=hdfs-SANDBOX" } } Not sure why the user.name its using hdfs-sandox instead hdfs. When I tried the curl, it works with hdfs-sandbox, but doesnt work with hdfs. Please let me know where I have to change the config to make it work.. Any help is greatly appreciated. thanks, Sreeram ... View more