modify exporter span parse

Author: JqRrt

cozeloop/internal/trace/exporter.py

@@ -173,7 +173,7 @@ def transfer_to_upload_span_and_file(spans: List['Span']) -> (List[UploadSpan],
 
 def parse_tag(span_tag: Dict[str, Any], is_system_tag: bool) -> (Dict[str, str], Dict[str, int], Dict[str, float], Dict[str, bool]):
     if not span_tag:
-        return {}, {}, {}
+        return {}, {}, {}, {}
 
     v_str_map = {}
     v_long_map = {}

cozeloop/internal/trace/span_processor.py

@@ -158,7 +158,7 @@ def export_func(ctx: dict, items: List[Any]):
             try:
                 upload_spans, upload_files = transfer_to_upload_span_and_file(spans)
             except Exception as e:
-                logger.warning(f"transfer_to_upload_span_and_file fail")
+                logger.warning(f"transfer_to_upload_span_and_file fail, {e}")
                 return
 
             event_err_msg = ""