AmazonDynamoDBException: Consistent reads are not supported on global secondary indexes

If you try to execute a DynamoDB query against a Global Secondary Index, by default you’ll get this error:

AmazonDynamoDBException: Consistent reads are not supported on global secondary indexes (Service: AmazonDynamoDBv2; Status Code: 400; Error Code: ValidationException

To avoid this, per answers on this question, you need to call:

.withConsistentRead(false);

on your query expression.

Although the docs here suggest queries are eventually consistent by default, apparently with the DynamoDB mapping api you still need to explicitly set the consisten read = false parameter.

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