minor fix

src/python/dm/daq_web_service/service/impl/uploadTracker.py

@@ -24,7 +24,7 @@ class UploadTracker(ObjectTracker):
             uploadInfo = self.get(uploadId)
             if uploadInfo is not None:
                 if uploadInfo.get('status') == 'running':
-                    raise ObjectAlreadyExists('Upload is already active for experiment %s in data directory %s.' % (experimentName, dataDir))
+                    raise ObjectAlreadyExists('Upload id %s is already active for experiment %s in data directory %s.' % (uploadId, experimentName, dataDir))
                 del self.activeUploadDict[activeUploadKey]
 
     def startUpload(self, uploadId, uploadInfo):