From ad754abba33da120975cd273492a069ec972621b Mon Sep 17 00:00:00 2001
From: Artur Signell <artur@vaadin.com>
Date: Fri, 3 Dec 2021 10:33:22 +0200
Subject: [PATCH] Make ErrorPageSecurityFilter compatible with Servlet 3.1

See gh-28902
---
 .../boot/web/servlet/filter/ErrorPageSecurityFilter.java    | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/filter/ErrorPageSecurityFilter.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/filter/ErrorPageSecurityFilter.java
index 1140efc8de18..9667ff5ce797 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/filter/ErrorPageSecurityFilter.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/filter/ErrorPageSecurityFilter.java
@@ -21,6 +21,7 @@
 import javax.servlet.DispatcherType;
 import javax.servlet.Filter;
 import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
 import javax.servlet.RequestDispatcher;
 import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
@@ -54,6 +55,11 @@ public ErrorPageSecurityFilter(ApplicationContext context) {
 		this.context = context;
 	}
 
+	@Override
+	public void init(FilterConfig filterConfig) throws ServletException {
+		// Intentionally blank
+	}
+
 	@Override
 	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
 			throws IOException, ServletException {