1 files changed, 5 insertions, 1 deletions
diff --git a/container-core/src/main/java/com/yahoo/restapi/RestApiImpl.java b/container-core/src/main/java/com/yahoo/restapi/RestApiImpl.java
index 090e06c221f..e5aeb33d45d 100644
--- a/container-core/src/main/java/com/yahoo/restapi/RestApiImpl.java
+++ b/container-core/src/main/java/com/yahoo/restapi/RestApiImpl.java
@@ -211,7 +211,11 @@ class RestApiImpl implements RestApi {
             exceptionMappers.addAll(RestApiMappers.DEFAULT_EXCEPTION_MAPPERS);
         }
         // Topologically sort children before superclasses, so most the specific match is found by iterating through mappers in order.
-        exceptionMappers.sort((a, b) -> (a.type.isAssignableFrom(b.type) ? 1 : 0) + (b.type.isAssignableFrom(a.type) ? -1 : 0));
+        exceptionMappers.sort((l, r) -> {
+            if (l.type.equals(r.type)) return 0;
+            if (l.type.isAssignableFrom(r.type)) return 1;
+            return -1;
+        });
         return exceptionMappers;
     }