Export dabase from dgraph server 1.0.9 reply empty

When I run the following command:
curl localhost:8080/admin/export

I get the following message after a long time wait:
curl: (52) Empty reply from server

and there no data exported.
anyone know why?

If you are using Docker, try to execute this request via curl inside the container using Docker Exec. If you still can’t export, open an issue in GitHub with more details of the case.

I didn’t use docker, just CentOS7, I have 3 million records in dgraph v1.0.9 and I run the command on my server machine。