Tweak error handling.

web/main/utils.py

@@ -625,7 +625,7 @@ def get_link_title(url: str) -> str:
     return title[0].text
 
 
-class LambdaExportTooLarge(RuntimeError):
+class LambdaException(RuntimeError):
     pass
 
 
@@ -765,7 +765,7 @@ def export_via_aws_lambda(obj, html, file_type):
         except (BotoCoreError, BotoClientError, requests.RequestException, AssertionError) as e:
             if export_type == "Casebook":
                 obj.inc_export_fails()
-            raise Exception(f"AWS Lambda export failed: {str(e)}")
+            raise LambdaException(f"AWS Lambda export failed: {str(e)}")
 
         finally:
             # remove the source html from s3

web/main/views.py

@@ -104,7 +104,7 @@
 )
 from .utils import (
     BadFiletypeError,
-    LambdaExportTooLarge,
+    LambdaException,
     StringFileResponse,
     fix_after_rails,
     get_link_title,
@@ -2771,11 +2771,12 @@ def export(request: HttpRequest, node: Union[ContentNode, Casebook], file_type="
             file_type,
             export_options=export_options,
         )
-    except LambdaExportTooLarge as too_large:
-        logger.warning(f"Export node({node.id}): " + too_large.args[0])
-        return render(request, "export_too_large.html", {"casebook": node})
+    except LambdaException as e:
+        logger.exception(f"Export of node {node.id} failed.")
+        return render(request, "export_error.html", {"casebook": node})
     if response_data is None:
         return render(request, "export_error.html", {"casebook": node})
+
     # return html
     if file_type == "html":
         return HttpResponse(response_data)