Derivatives race condition

[justinlittman]

Messages like this can be found in the log for the derivative lambdas:

However, when you query Neptune, the resource is found:

[ec2-user@ip-10-0-0-73 ~]$ curl --http1.1 -H "Accept: application/json" http://rialto.cxsoyq1pdmta.us-west-2.neptune.amazonaws.com:8182/sparql --data-binary 'query=SELECT ?type WHERE { <http://sul.stanford.edu/rialto/publications/c22bd1e729b5f66c3d696ed86e7d4092> a ?type . }'
{
  "head" : {
    "vars" : [ "type" ]
  },
  "results" : {
    "bindings" : [ {
      "type" : {
        "type" : "uri",
        "value" : "http://purl.org/ontology/bibo/Document"
      }
    }, {
      "type" : {
        "type" : "uri",
        "value" : "http://purl.org/ontology/bibo/Article"
      }
    } ]
  }

This suggests that the derivative lambda is executed before the resource is available from Neptune (but presumably after it has been inserted).