Hi,    Executing "hdfs dfs -ls /", we are getting a KrbException: Fail to create credential. (63) - No service creds even with a valid kerberos ticket on a particular Kerberos realm.   We've been looking into the source code of the JVM and we think we might find the cause with DEBUG level. According to http://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HDFSCommands.html, there is a loglevel option to the hdfs command. So we launch it like this:   hdfs dfs -ls / --loglevel DEBUG   But that seems to have no effect (only WARN is getting printed). How can we control the loglevel?   Thanks in advance ... View more