When we run a workflow in Team Studio to read data in the TDV S3 data source, we may encounter the error " Execution of 'demographics' failed. Error details: An internal error has occurred.
Cause: java.nio.file.AccessDeniedException: : Instantiate org.apache.hadoop.fs.s3a.auth.AssumedRoleCredentialProvider on : com.amazonaws.services.securitytoken.model.AWSSecurityTokenServiceException: The security token".

This article describes the steps that can be used to resolve this issue.

This error message is generated while reading data from the TDV S3 data source in Team Studio when Access Key ID and Secret Access Key provided in the Amazon S3 data source in TDV is no longer valid.

To resolve this issue, we need to generate a new Access Key ID and Secret Access Key from AWS and update the data source with new keys.

Steps to Generate a new Access Key from AWS:

1. Navigate to Services=> IAM=> Users in AWS console.
2. Choose your IAM user name (not the check box).
3. Open the Security credentials tab, and then select Create access key. 
4. To see the new access key, choose the Show option. 

Steps to update new Access Key in the S3 data source:

1. Open TDV studio
2. Navigate to the S3 data source, update the Access Key ID and Secret Access key with newly generated keys, and save the changes.