From f90e643f6ae1ef50036a18a83f81ac74ffbe116c Mon Sep 17 00:00:00 2001
From: Chris Bowditch <cbowditch@apache.org>
Date: Wed, 21 Apr 2010 19:07:54 +0000
Subject: [PATCH] recent change to cache CharacterSet exposed multi threading
 issue

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@936447 13f79535-47bb-0310-9956-ffa450edef68
---
 src/java/org/apache/fop/afp/fonts/CharacterSet.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/java/org/apache/fop/afp/fonts/CharacterSet.java b/src/java/org/apache/fop/afp/fonts/CharacterSet.java
index 555d70158..24c53a1c3 100644
--- a/src/java/org/apache/fop/afp/fonts/CharacterSet.java
+++ b/src/java/org/apache/fop/afp/fonts/CharacterSet.java
@@ -362,7 +362,11 @@ public class CharacterSet {
      */
     public byte[] encodeChars(CharSequence chars) throws CharacterCodingException {
         if (encoder != null) {
-            ByteBuffer bb = encoder.encode(CharBuffer.wrap(chars));
+            ByteBuffer bb;
+            // encode method is not thread safe
+            synchronized (encoder) {
+                bb = encoder.encode(CharBuffer.wrap(chars));
+            }
             if (bb.hasArray()) {
                 return bb.array();
             } else {
-- 
2.39.5