livy curl request error for Kerberos Cloudera Hadoop
This error indicates that your kerberos ticket most likely doesn't exist or expired.
Have you run kinit to create your kerberos ticket?
For Testing purpose, Can you kinit as hdfs user using (you can find the keytab under HDFS roles machine - Namenode, Datanode /var/run/cloudera-scm-agent/process/hdfs/hdfs.keytab)
kinit -kt hdfs.keytab hdfs/hostname@REALM
or kinit as your user kinit user@REALM
And then try
curl --negotiate -u : -X GET -H "Content-Type: application/json" http://xxxx.xxxx:8998/sessions
In order to find pyspark sessions,
curl --negotiate -u : -X POST --data '{"kind": "pyspark"}' -H "Content-Type: application/json" http://xxxxx:8998/sessions