Add extra log information for failing visitor (#12910) (#12913)

Add error log for when a class visitor fails with an exception for easier debugging. Fixes #12759 Co-authored-by: caalador <[email protected]>
vaadin · Feb 2, 2022 · 3b0b306 · 3b0b306
1 parent b3e39b4
commit 3b0b306
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/flow-server/src/main/java/com/vaadin/flow/server/frontend/scanner/FrontendDependencies.java b/flow-server/src/main/java/com/vaadin/flow/server/frontend/scanner/FrontendDependencies.java
@@ -581,6 +581,11 @@ private EndPointData visitClass(String className, EndPointData endPoint,
         try (InputStream is = url.openStream()) {
             ClassReader cr = new ClassReader(is);
             cr.accept(visitor, ClassReader.EXPAND_FRAMES);
+        } catch (Exception e) {
+            log().error(
+                    "Visiting class {} failed with {}.\nThis might be a broken class in the project.",
+                    className, e.getMessage());
+            throw e;
         }
 
         // all classes visited by the scanner, used for performance (#5933)