[SOLVED] 404 Not Found on load from Jena into Blazegraph

404 Not Found on load from Jena into Blazegraph

I have a simple piece of code using Jena's RDFConnection to load rdf into Blazegraph, but keep getting HTTP 404 Not found:

public void simpleLoad() {
    String service = "http://localhost:8889/bigdata";
  try ( RDFConnection conn = RDFConnectionFactory.connect(service) ) {
    conn.load("/Users/rf/test2.rdf") ;
  //Txn.executeWrite(conn, ()-> {
     //conn.load("/Users/rf/test2.rdf") ;
  //});
  } catch (Exception ex) {
        System.out.println(ex);
  }
}

Sparql requests work fine for this service url. I tried to call connect() with more detailed urls, like

connect(service, service, "http://localhost:8889/bigdata/dataloader")

which was mentioned somewhere, but this resulted in HTTP 400 Bad request instead.

Probably worth mentioning that Blazegraph is running in Docker in my setup

Solution

Go to you Blazegraph Workbench. Select the Namespaces tab. For you namespace click "Service Description". That will create a sparql.rdf. Open that and search for sparqlEndpoint. That is IRI you need to use for RDFConnection. Then

  RDFConnection conn = RDFConnectionFactory.connect(service);
  conn.load(data);
  conn.close();

should work.