--- old/src/java.base/share/classes/sun/net/www/protocol/jar/JarURLConnection.java	2020-05-11 23:52:39.323393929 +0100
+++ new/src/java.base/share/classes/sun/net/www/protocol/jar/JarURLConnection.java	2020-05-11 23:52:39.214393145 +0100
@@ -89,8 +89,16 @@
     }
 
     public JarFile getJarFile() throws IOException {
-        connect();
-        return jarFile;
+        try {
+            connect();
+            return jarFile;
+        } catch (IOException e) {
+            if (jarFile != null) {
+                return jarFile;
+            } else {
+                throw e;
+            }
+        }
     }
 
     public JarEntry getJarEntry() throws IOException {