@shah1  Your user sync is expecting JSON string to begin with an object opening brace. e.g. {  But the string you are passing is starting with an open quote " or something else Check the User or Group config some parameters should be in curly braces   Hope that helps ... View more

@svasi  Can you check and share your pseudonymized   /etc/krb5.conf? ... View more

@PrernaU  There are 2 issues here the home directory for spark  doesn't exist and a permission issue  switch to the superuser  i.e hdfs or whatever and run the below command   $ hdfs dfs -mkdir /user/spark Then change the ownership  $ hdfs dfs -chown spark:spark /user/spark Make sure the permissions are correct for spark   You should now be able to restart successfully spark    Hope that helps   ... View more