From be735356110a42e14546ebf92a0026e5181a16dc Mon Sep 17 00:00:00 2001
From: Dave Syer <dsyer@gopivotal.com>
Date: Wed, 12 Feb 2014 09:16:21 +0000
Subject: [PATCH] Defensive catch block in LogbackLoggingSystem

Older versions of JBoss AS have a classpath clash with an older
SLF4J (pre 1.6.5), so to prevent an app from blowing up on
startup we defensively catch a NoSuchMethodError.

Fixes gh-339
---
 .../boot/logging/logback/LogbackLoggingSystem.java        | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/spring-boot/src/main/java/org/springframework/boot/logging/logback/LogbackLoggingSystem.java b/spring-boot/src/main/java/org/springframework/boot/logging/logback/LogbackLoggingSystem.java
index 9e4886236b2..e781666a491 100644
--- a/spring-boot/src/main/java/org/springframework/boot/logging/logback/LogbackLoggingSystem.java
+++ b/spring-boot/src/main/java/org/springframework/boot/logging/logback/LogbackLoggingSystem.java
@@ -67,7 +67,13 @@ public class LogbackLoggingSystem extends AbstractLoggingSystem {
 	public void beforeInitialize() {
 		super.beforeInitialize();
 		if (ClassUtils.isPresent("org.slf4j.bridge.SLF4JBridgeHandler", getClassLoader())) {
-			SLF4JBridgeHandler.removeHandlersForRootLogger();
+			try {
+				SLF4JBridgeHandler.removeHandlersForRootLogger();
+			}
+			catch (NoSuchMethodError e) {
+				// Method missing in older versions of SLF4J like in JBoss AS 7.1
+				SLF4JBridgeHandler.uninstall();
+			}
 			SLF4JBridgeHandler.install();
 		}
 	}