From 831008f42d028ef3feae3e58794a6590d401144a Mon Sep 17 00:00:00 2001
From: Ryan Baxter <rbaxter@pivotal.io>
Date: Fri, 27 Jul 2018 16:08:29 -0400
Subject: [PATCH] Handle ClassCastException

---
 .../handler/predicate/ReadBodyPredicateFactory.java       | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/handler/predicate/ReadBodyPredicateFactory.java b/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/handler/predicate/ReadBodyPredicateFactory.java
index 798d09460..621d2f243 100644
--- a/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/handler/predicate/ReadBodyPredicateFactory.java
+++ b/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/handler/predicate/ReadBodyPredicateFactory.java
@@ -60,8 +60,12 @@ public class ReadBodyPredicateFactory
 			Object cachedBody = exchange.getAttribute(CACHE_REQUEST_BODY_OBJECT_KEY);
 			Mono<?> modifiedBody;
 			if(cachedBody != null) {
-				boolean test = config.predicate.test(cachedBody);
-				exchange.getAttributes().put(TEST_ATTRIBUTE, test);
+				try {
+					boolean test = config.predicate.test(cachedBody);
+					exchange.getAttributes().put(TEST_ATTRIBUTE, test);
+				} catch(ClassCastException e) {
+					//predicate test failed because class in predicate does not match the cached body object
+				}
 				modifiedBody = Mono.just(cachedBody);
 			} else {
 				ServerRequest serverRequest = new DefaultServerRequest(exchange);