/admin/datastore?op=reload-services reloads the application's main and library modules for the Web services.
The reload-services operation causes the Dgraph to process all existing preceding queries, temporarily stop processing other queries, and begin to process the reload-services request. After it finishes processing this operation, the Dgraph resumes processing queries that queued up temporarily behind this request.
In a cluster of Dgraph nodes, this command should be run on the leader node only.