Facing issue on SQL Server with Elastic Search

I have integrated SQL Server with Elastic Search. I face the problem with data type TEXT and NVARCHAR(MAX).

If I use any of this datatype in SQL Server, no result is returned by Elastic Search.

Why does this happen?
Is there any solution for this?

Do you use JDBC importer? https://github.com/jprante/elasticsearch-jdbc

Thanks for your reply jprante. No, am not use JDBC importer. I will check with that and let u know.

I have download JDBC importer. I dont know How to use it in Elastic search?. Will you please explain that.

Thank you jprante. After using JDBC importer its working fine.