From cf22371d3e3cb36d84e03a09396df9e1c9c10c1a Mon Sep 17 00:00:00 2001
From: Florian Schmaus <flo@geekplace.eu>
Date: Sun, 14 Oct 2018 12:10:50 +0200
Subject: [PATCH] Catch IllegalArgumentException in XmlUtil clinit

Fixes SMACK-833.
---
 .../src/main/java/org/jivesoftware/smack/util/XmlUtil.java  | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/smack-core/src/main/java/org/jivesoftware/smack/util/XmlUtil.java b/smack-core/src/main/java/org/jivesoftware/smack/util/XmlUtil.java
index 7fc081b43..b55297d6e 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/util/XmlUtil.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/util/XmlUtil.java
@@ -35,7 +35,11 @@ public class XmlUtil {
     private static final TransformerFactory transformerFactory = TransformerFactory.newInstance();
 
     static {
-        transformerFactory.setAttribute("indent-number", 2);
+        try {
+            transformerFactory.setAttribute("indent-number", 2);
+        } catch (IllegalArgumentException e) {
+            LOGGER.log(Level.INFO, "XML TransformerFactory does not support indent-number attribute", e);
+        }
     }
 
     public static String prettyFormatXml(CharSequence xml) {