Hi,   I have to upgrade an "old" cluster still running a 5.1.x version to (hopefully) the latest minor version available (5.12.1). Leaving aside compatibility issues on the pig/MR jobs, can i upgrade directly 5.1 -> 5.12 (both Cloudera Manager and CDH) or do I have to perform the upgrade in multiple steps (e.g. 5.1 -> 5.4 -> 5.12)?     Thanks, parnigot ... View more

Hi,   I've recently decomissioned a couple of hosts from a cluster (replaced with newer machines). The cluster is using kerberos authentication managed via Cloudera Manager and I've noticed that the page listing all the available credentials (Administration -> Security -> Kerberos Credentials) continues to list the SPNs for the decomissioned machines.   Is there any way to clean them up? I've searched in the documentation and I've only found this API endpoint https://cloudera.github.io/cm_api/apidocs/v17/path__cm_commands_deleteCredentials.html that deletes ALL the SPNs (I need to delete only the old ones).   Thanks p.   ... View more

I'm writing a small script to monitor the status of BDR jobs with the REST apis.   I'm having some issue with an endpoint that takes a long time to respond (from my limited testing it scales lineary with the number of jobs and the depth of the history for each job): https://cloudera.github.io/cm_api/apidocs/v17/path__clusters_-clusterName-_services_-serviceName-_replications.html   In the linked documentation it appears that the api accepts a limits parameter but It's not very well documented: what arguments does it accept? Maybe something to limit the history size?       ... View more

Hi,   I have a host running a NFS gateway mounted on the same machine under /mnt/hdfs. Permissions seems to work fine for all the regular users, my only issue is the hdfs user. When I access a file using the native hdfs client the hdfs user is considered "the root user" and can perform any operation, is this true even for the file and folders exported via the NFS gateway?   In my installation it doesn't work:   [hdfs@hostname:/mnt/hdfs/app]$ ls -l total 3 drwxr-x---. 5 userA nobody 160 19 giu 13:02 appA drwxr-x---. 5 userB nobody 160 19 giu 13:02 appB drwxr-x---. 5 userC nobody 160 19 giu 13:02 appC [hdfs@hostname:/mnt/hdfs/app]$ cd appA bash: cd: appA: Permission denied If I try to read from the folder /mnt/hdfs/app/appA as userA it works just fine.   Is this the expected or I have misconfigured something? ... View more