Index: contrib/analyzers/common/src/java/org/apache/lucene/analysis/compound/HyphenationCompoundWordTokenFilter.java
===================================================================
--- contrib/analyzers/common/src/java/org/apache/lucene/analysis/compound/HyphenationCompoundWordTokenFilter.java	(revision 1029227)
+++ contrib/analyzers/common/src/java/org/apache/lucene/analysis/compound/HyphenationCompoundWordTokenFilter.java	(working copy)
@@ -143,9 +143,13 @@
   public static HyphenationTree getHyphenationTree(Reader hyphenationReader)
       throws Exception {
     HyphenationTree tree = new HyphenationTree();
+    final InputSource is = new InputSource(hyphenationReader);
+    // we need this to load the DTD in very old parsers (like the one in JDK 1.4).
+    // The DTD itsself is provided via EntityResolver, so it should always load, but
+    // some parsers still want to have a base URL (Crimson).
+    is.setSystemId("dtd://non-null-dummy");
+    tree.loadPatterns(is);
 
-    tree.loadPatterns(new InputSource(hyphenationReader));
-
     return tree;
   }