public String getCompletedUrl() {
    if (theUriInfo == null) {
      return null;
    }
    if (theUriInfo.getBaseUri() == null) {
      return null;
    }
    return theUriInfo.getBaseUri() + VERSION
      + "/internal/complete/$jobId?status=$jobStatus";
  }
The callback url on this server when a task is completed.
hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/Server.java