fixbug:app realte info not return

**Phenomenon and reproduction steps**

**Root cause and solution**

**Impactions**

**Test method**

**Affected branch(es)**

* main

**Checklist**

- [ ] Dependencies update required
- [ ] Common bug (similar problem in other repo)

app/app/application/l7_flow_tracing.py

@@ -277,8 +277,8 @@ async def trace_l7_flow(self,
                         TAP_SIDE_CLIENT_APP, TAP_SIDE_SERVER_APP, TAP_SIDE_APP
                 ] or not dataframe_flowmetas['span_id'][index]:
                     continue
-                if dataframe_flowmetas['trace_id'][index] not in [0, '']:
-                    continue
+                #if dataframe_flowmetas['trace_id'][index] not in [0, '']:
+                #    continue
                 if type(dataframe_flowmetas['span_id'][index]) == str and \
                     dataframe_flowmetas['span_id'][index] and \
                         type(dataframe_flowmetas['parent_span_id'][index]) == str and \
@@ -361,7 +361,7 @@ async def trace_l7_flow(self,
                 for network in networks:
                     network.set_relate(new_flows, related_map)
 
-            if new_app_metas:
+            if apps:
                 for app in apps:
                     app.set_relate(new_flows, related_map)
             dataframe_flowmetas = pd.concat([dataframe_flowmetas, new_flows],