下载文件报错

库版本1.7.7
下载服务器用的hfs 在本地电脑上开的站点，下载报错，这是为什么吗？
java.net.SocketException: Connection failed with request[{If-Match=[95A8B15FF8BA33D30AE21C9AC2CBDFC3], Range=[bytes=10195214-], User-Agent=[FileDownloader/1.7.7]}] response[{null=[HTTP/1.1 503 �����޷���ȡ], Accept-Ranges=[bytes], Content-Type=[text/html], ETag=[95A8B15FF8BA33D30AE21C9AC2CBDFC3], Last-Modified=[Thu, 08 Aug 2024 03:43:47 GMT], Server=[HFS 2.4rc2], Set-Cookie=[HFS_SID_=0.095283466624096; path=/; HttpOnly], X-Android-Received-Millis=[1723110802032], X-Android-Response-Source=[NETWORK 503], X-Android-Selected-Protocol=[http/1.1], X-Android-Sent-Millis=[1723110801957]}] http-state[503] on task[2098549956-2], which is changed after verify connection, so please try again.

Start by reproducing the download with FileDownloader 1.7.7 against the reported HFS 2.4rc2 server, focusing on the resumed Range request and HTTP 503 response shown in the issue. Trace the downloader path that handles this response and compare it with the server behavior; done means identifying a reproducible cause and a confirmed fix or documented compatibility requirement.

Written by the indexing model from the issue text.