Fix https://java.net/jira/browse/GLASSFISH-18391

Kin Man Chung · Kin Man Chung · commit a060cf8a1643 · 2014-05-16T17:26:00.000Z
svn path=/trunk/; revision=1463
diff --git a/impl/src/main/java/org/apache/jasper/compiler/TagLibraryInfoImpl.java b/impl/src/main/java/org/apache/jasper/compiler/TagLibraryInfoImpl.java
@@ -626,7 +626,9 @@ private TagFileInfo createTagFileInfo(TreeNode elem, String uri,
 
 	if (path.startsWith("/META-INF/tags")) {
 	    // Tag file packaged in JAR
-	    ctxt.getTagFileJarUrls().put(path, jarFileUrl);
+            if (jarFileUrl != null) {
+	        ctxt.getTagFileJarUrls().put(path, jarFileUrl);
+            }
 	} else if (!path.startsWith("/WEB-INF/tags")) {
 	    err.jspError("jsp.error.tagfile.illegalPath", path);
 	}
