Dear Community,   After a successful installion of Cloudera Runtime 7.0.3, we tried to do a Kerberization process. (We did the same before with 5.14) Everything went fine with the Kerberos wizard, but after in the config deployment phase, the YARN NodeManagers failed to start with the following error:   Error starting NodeManager org.apache.hadoop.yarn.exceptions.YarnRuntimeException: Failed to initialize container executor at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:394) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:936) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:1016) Caused by: java.io.IOException: Linux container executor not configured properly (error=-1) at org.apache.hadoop.yarn.server.nodemanager.LinuxContainerExecutor.init(LinuxContainerExecutor.java:307) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:392) ... 3 more Caused by: org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.PrivilegedOperationException: java.io.IOException: Cannot run program "/var/lib/yarn-ce/bin/container-executor": error=13, Permission denied at org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.PrivilegedOperationExecutor.executePrivilegedOperation(PrivilegedOperationExecutor.java:183) at org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.PrivilegedOperationExecutor.executePrivilegedOperation(PrivilegedOperationExecutor.java:206) at org.apache.hadoop.yarn.server.nodemanager.LinuxContainerExecutor.init(LinuxContainerExecutor.java:300) ... 4 more Caused by: java.io.IOException: Cannot run program "/var/lib/yarn-ce/bin/container-executor": error=13, Permission denied at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048) at org.apache.hadoop.util.Shell.runCommand(Shell.java:938) at org.apache.hadoop.util.Shell.run(Shell.java:901) at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:1213) at org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.PrivilegedOperationExecutor.executePrivilegedOperation(PrivilegedOperationExecutor.java:152) ... 6 more Caused by: java.io.IOException: error=13, Permission denied at java.lang.UNIXProcess.forkAndExec(Native Method) at java.lang.UNIXProcess.<init>(UNIXProcess.java:247) at java.lang.ProcessImpl.start(ProcessImpl.java:134) at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) ... 10 more  We tried to search the "answer" on the internet. We found that we should add the yarn user in the hadoop group.   [root@dwh20-i-cdhwt01 ~]# id yarn uid=485(yarn) gid=984(yarn) groups=984(yarn),988(hadoop)   Nothing happened, the NodeManagers didn't start. The container-executor script permission:   [root@dwh20-i-cdhwt01 ~]# ll /var/lib/yarn-ce/bin/container-executor ---Sr-s--- 1 root yarn 103968 Nov 19 12:34 /var/lib/yarn-ce/bin/container-executor   (Just for information, we didn't find container-executor config file on the NodeManagers.)   Please somebody help us. 🙂 Thanks.   Regards, Gabor    ... View more