jenkins下载插件下载不了，解决办法

虚拟机运行下载更新jenkins插件失败

jenkins安装更新插件失败，

java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jquery/1.12.4-1/jquery.hpi
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:263)
at hudson.model.UpdateCenter U p d a t e C e n t e r C o n f i g u r a t i o n . d o w n l o a d ( U p d a t e C e n t e r . j a v a : 1291 ) C a u s e d : j a v a . i o . I O E x c e p t i o n : F a i l e d t o l o a d h t t p s : / / u p d a t e s . j e n k i n s . i o / d o w n l o a d / p l u g i n s / j q u e r y / 1.12.4 − 1 / j q u e r y . h p i t o / r o o t / . j e n k i n s / p l u g i n s / j q u e r y . j p i . t m p a t h u d s o n . m o d e l . U p d a t e C e n t e r UpdateCenterConfiguration.download(UpdateCenter.java:1291) Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jquery/1.12.4-1/jquery.hpi to /root/.jenkins/plugins/jquery.jpi.tmp at hudson.model.UpdateCenter UpdateCenterConfiguration.download(UpdateCenter.java:1291)Caused:java.io.IOException:Failedtoloadhttps://updates.jenkins.io/download/plugins/jquery/1.12.4−1/jquery.hpito/root/.jenkins/plugins/jquery.jpi.tmpathudson.model.UpdateCenterUpdateCenterConfiguration.download(UpdateCenter.java:1302)
Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jquery/1.12.4-1/jquery.hpi (redirected to: https://get.jenkins.io/plugins/jquery/1.12.4-1/jquery.hpi)
at hudson.model.UpdateCenter U p d a t e C e n t e r C o n f i g u r a t i o n . d o w n l o a d ( U p d a t e C e n t e r . j a v a : 1336 ) a t h u d s o n . m o d e l . U p d a t e C e n t e r UpdateCenterConfiguration.download(UpdateCenter.java:1336) at hudson.model.UpdateCenter UpdateCenterConfiguration.download(UpdateCenter.java:1336)athudson.model.UpdateCenterDownloadJob._run(UpdateCenter.java:1893)
at hudson.model.UpdateCenter I n s t a l l a t i o n J o b . r u n ( U p d a t e C e n t e r . j a v a : 2205 ) a t h u d s o n . m o d e l . U p d a t e C e n t e r InstallationJob._run(UpdateCenter.java:2205) at hudson.model.UpdateCenter InstallationJob.r​un(UpdateCenter.java:2205)athudson.model.UpdateCenterDownloadJob.run(UpdateCenter.java:1867)
at java.util.concurrent.Executors R u n n a b l e A d a p t e r . c a l l ( E x e c u t o r s . j a v a : 511 ) a t j a v a . u t i l . c o n c u r r e n t . F u t u r e T a s k . r u n ( F u t u r e T a s k . j a v a : 266 ) a t h u d s o n . r e m o t i n g . A t m o s t O n e T h r e a d E x e c u t o r RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at hudson.remoting.AtmostOneThreadExecutor RunnableAdapter.call(Executors.java:511)atjava.util.concurrent.FutureTask.run(FutureTask.java:266)athudson.remoting.AtmostOneThreadExecutorWorker.run(AtmostOneThreadExecutor.java:121)
at java.lang.Thread.run(Thread.java:748)
如图

解决办法

一，有可能是下载源有问题
已知有三个源

https://updates.jenkins.io/update-center.json（或https://updates.jenkins.io/update-center.json）
https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json
http://mirror.esuni.jp/jenkins/updates/update-center.json
具体位置

拉到最后，如下图换源

办法二，换网络
我整了一下午也没想到这么解决，最后一个技术大牛告诉我，换一下网络试试。
真的换成手机网络好了。开心