bugzillarest: handle HTTP 400 gracefully to stop pagination

Signed-off-by: Dev10-sys <kalpanagola9897@gmail.com>

Author: Dev10-sys

perceval/backends/core/bugzillarest.py

@@ -459,7 +459,18 @@ def call(self, resource, params):
 
         logger.debug("Bugzilla REST client requests: %s params: %s",
                      resource, str(params))
-        r = self.fetch(url, payload=params, headers=headers)
+        try:
+            r = self.fetch(url, payload=params, headers=headers)
+        except requests.exceptions.HTTPError as e:
+            if e.response is not None and e.response.status_code == 400:
+                logger.warning(
+                    "Bugzilla REST returned 400 for resource %s with params %s. "
+                    "Stopping pagination gracefully.",
+                    resource, params
+                )
+                return json.dumps({"bugs": []})
+            raise
+
 
         # Check for possible Bugzilla API errors
         result = r.json()