Access error : Spark query from AWS EMR with AWS Lake Formation

Question

I am trying to integrate EMR with Lake Formation. The EMR cluster has been created with Default Roles for both EMR and EC2 instances. In addition to the default permissions created in those Roles, I have also provided full access on Lake formation and Glue to the Default roles . I selected the default Service linked Role for all s3 buckets registered with this Lake formation.

After creating Jupyter notebook, which uses the above created cluster, I tried running

spark.sql ("show databases") and spark.sql("use ")

to get the following error

**An error was encountered:
org.apache.spark.sql.catalyst.analysis.AccessControlException: Unable to verify existence of default database: com.amazonaws.services.glue.model.AccessDeniedException: Insufficient Lake Formation permission(s) on default (Service: AWSGlue; Status Code: 400; Error Code: AccessDeniedException; Request ID: .....; Proxy: null);**

I think i have tried everything with permissions and not able to understand the root cause for the error. Appreciate any pointers which would help understand / resolve the error. Many Thanks.

Answer

I was able to resolve this error - When spark tries connecting to Lake formation, it checks if 'default' database exists. Since my Lake formation did not have a database named 'default', hence the error. 
Creating a database named 'default' and granting permission on Database to the default EMR_EC2_DefaultRole resolved the error

Access error : Spark query from AWS EMR with AWS Lake Formation

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