--- old/src/java.base/share/classes/java/net/JarURLConnection.java	2020-05-11 23:52:38.912390973 +0100
+++ new/src/java.base/share/classes/java/net/JarURLConnection.java	2020-05-11 23:52:38.803390189 +0100
@@ -215,7 +215,8 @@
      *
      * @return the JAR file for this connection. If the connection is
      * a connection to an entry of a JAR file, the JAR file object is
-     * returned
+     * returned. The JAR file is also returned if the connection to
+     * a JAR file entry fails, but the JAR file itself is accessible.
      *
      * @throws    IOException if an IOException occurs while trying to
      * connect to the JAR file for this connection.
@@ -228,7 +229,10 @@
      * Returns the Manifest for this connection, or null if none.
      *
      * @return the manifest object corresponding to the JAR file object
-     * for this connection.
+     * for this connection. If the connection is a connection to an
+     * entry of a JAR file, the manifest object is also returned if the
+     * connection to a JAR file entry fails, but the JAR file itself is
+     * accessible.
      *
      * @throws    IOException if getting the JAR file for this
      * connection causes an IOException to be thrown.
@@ -248,7 +252,8 @@
      * the JAR URL for this connection points to a JAR file.
      *
      * @throws    IOException if getting the JAR file for this
-     * connection causes an IOException to be thrown.
+     * connection causes an IOException to be thrown, or if the
+     * connection to a JAR file entry fails.
      *
      * @see #getJarFile
      * @see #getJarEntry
--- 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 {