Created attachment 35756 [details]
OldExcelExtractor patch file to fix the open stream bug

open(InputStream biffStream) closed the NPOIFSFileSystem  right after open which is wrong. We should only close it when open failed.

The buggy code:
            try {
                open(poifs);
            } finally {
                poifs.close();
            }

Should be:
            try {
                open(poifs);
                toClose = poifs; // Fixed by GR, we should not close it here
            } finally {
                if (toClose == null) {
                    poifs.close();
                }
            }

Attached is the patch file