Problem with uploading data to ES

[Tereci]

Got this message two times for different entities. When restarted with no modification went ok.

D, [2012-05-25T13:23:17.785375 #6033] DEBUG -- : POST /gdc/projects/j05tn2t7370mebykz6fv9p7rmhs695br/eventStore/stores/A16Z/uploadTasks, payload: {"uploadTask":{"file":"/uploads/j05tn2t7370mebykz6fv9p7rmhs695br/a16z_sponsored_deal.csv","entity":"a16z_sponsored_deal","attributes":[{"type":"timestamp","name":"Timestamp"},{"type":"recordid","name":"Id"},{"type":"attribute","name":"Name"},{"type":"attribute","name":"Company"},{"type":"attribute","name":"Opportunity__c"}]}}
D, [2012-05-25T13:23:17.964209 #6033] DEBUG -- : Response: {"asyncTask"=>{"link"=>{"poll"=>"/gdc/projects/j05tn2t7370mebykz6fv9p7rmhs695br/eventStore/stores/A16Z/uploadTasks/2df155d75ba6501224dd6b9742e447b4"}}}
D, [2012-05-25T13:23:17.964295 #6033] DEBUG -- : GET /gdc/projects/j05tn2t7370mebykz6fv9p7rmhs695br/eventStore/stores/A16Z/uploadTasks/2df155d75ba6501224dd6b9742e447b4
D, [2012-05-25T13:23:28.079574 #6033] DEBUG -- : GET /gdc/projects/j05tn2t7370mebykz6fv9p7rmhs695br/eventStore/stores/A16Z/uploadTasks/2df155d75ba6501224dd6b9742e447b4
D, [2012-05-25T13:23:28.282924 #6033] DEBUG -- : get: https://secure-di.gooddata.com/uploads/j05tn2t7370mebykz6fv9p7rmhs695br/
input must be a string or IO