it

core/scanner.py

@@ -452,13 +452,16 @@ class Scanner:
         return eligible
 
     def _already_queried_provider(self, target: str, provider_name: str) -> bool:
-        """Check if we already queried a provider for a target."""
+        """Check if we already successfully queried a provider for a target."""
         if not self.graph.graph.has_node(target):
             return False
             
         node_data = self.graph.graph.nodes[target]
         provider_states = node_data.get('metadata', {}).get('provider_states', {})
-        return provider_name in provider_states
+        
+        # A provider has been successfully queried if a state exists and its status is 'success'
+        provider_state = provider_states.get(provider_name)
+        return provider_state is not None and provider_state.get('status') == 'success'
 
     def _query_single_provider_forensic(self, provider, target: str, is_ip: bool, current_depth: int) -> Optional[List]:
         """Query a single provider with stop signal checking."""

providers/dns_provider.py

@@ -50,12 +50,7 @@ class DNSProvider(BaseProvider):
     def query_domain(self, domain: str) -> List[Tuple[str, str, str, float, Dict[str, Any]]]:
         """
         Query DNS records for the domain to discover relationships.
-
-        Args:
-            domain: Domain to investigate
-
-        Returns:
-            List of relationships discovered from DNS analysis
+        ...
         """
         if not _is_valid_domain(domain):
             return []
@@ -66,11 +61,13 @@ class DNSProvider(BaseProvider):
         for record_type in ['A', 'AAAA', 'CNAME', 'MX', 'NS', 'SOA', 'TXT', 'SRV', 'CAA']:
             try:
                 relationships.extend(self._query_record(domain, record_type))
+            except resolver.NoAnswer:
+                # This is not an error, just a confirmation that the record doesn't exist.
+                self.logger.logger.debug(f"No {record_type} record found for {domain}")
             except Exception as e:
                 self.failed_requests += 1
                 self.logger.logger.debug(f"{record_type} record query failed for {domain}: {e}")
-                # Re-raise the exception so the scanner can handle it
-                raise e
+                # Optionally, you might want to re-raise other, more serious exceptions.
 
         return relationships