From 5c319173ee7b873f85cd3e84046cf559b8577d36 Mon Sep 17 00:00:00 2001
From: Jochen Schalanda <jochen@schalanda.name>
Date: Thu, 26 Nov 2020 13:47:55 +0100
Subject: [PATCH] Skip errors when visiting default implementations in
 ConfigurationMetadata (#3577)

Fixes #3557
---
 .../dropwizard/configuration/ConfigurationMetadata.java   | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/dropwizard-configuration/src/main/java/io/dropwizard/configuration/ConfigurationMetadata.java b/dropwizard-configuration/src/main/java/io/dropwizard/configuration/ConfigurationMetadata.java
index ea2c5b8c473..e5ddafecedd 100644
--- a/dropwizard-configuration/src/main/java/io/dropwizard/configuration/ConfigurationMetadata.java
+++ b/dropwizard-configuration/src/main/java/io/dropwizard/configuration/ConfigurationMetadata.java
@@ -106,6 +106,7 @@ public boolean isCollectionOfStrings(String fieldName) {
     }
 
     @Override
+    @SuppressWarnings("java:S106")
     public JsonObjectFormatVisitor expectObjectFormat(JavaType type) throws JsonMappingException {
         // store the pointer to the own instance
         final ConfigurationMetadata thiss = this;
@@ -159,8 +160,11 @@ public void optionalProperty(BeanProperty prop) throws JsonMappingException {
                 parentProps.add(prop);
 
                 // visit the type of the property (or its defaultImpl).
-                mapper.acceptJsonFormatVisitor(
-                        defaultImpl == null ? fieldType.getRawClass() : defaultImpl, thiss);
+                try {
+                    mapper.acceptJsonFormatVisitor(defaultImpl == null ? fieldType.getRawClass() : defaultImpl, thiss);
+                } catch (NoClassDefFoundError | Exception e) {
+                    System.err.println(getClass() + ": " + e.getMessage());
+                }
 
                 // reset state after the recursive traversal
                 parentProps.remove(prop);