更新 Jenkins 之后连接失败

如何解决更新 Jenkins 之后连接失败

我在尝试更新我们的 Jenkins 服务器时遇到了噩梦。我们正在使用 Debian VM 来托管我们的服务器。上次更新是两年前。所以我克隆了虚拟机以防万一（感谢上帝，因为有）。我下载了最新的 war 文件并将其移动到 /usr/share/jenkins 并完成：

service jenkins stop
service jenkins start

我从 2.190.3 更新，仍然安装了 java 8。

从那里开始，我尝试在浏览器中检查更新是否完成，最终得到 502 错误的网关页面。

当我尝试时：

java -jar jenkins-cli.jar -s http://localhost:8080/ version 

我明白了：

java.net.ConnectException: Connection refused (Connection refused)
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
        at java.net.socksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.socket.connect(Socket.java:607)
        at java.net.socket.connect(Socket.java:556)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
        at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
        at sun.net.www.http.HttpClient.New(HttpClient.java:339)
        at sun.net.www.http.HttpClient.New(HttpClient.java:357)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1226)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1162)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:990)
        at sun.net.www.protocol.http.HttpURLConnection.getoutputStream0(HttpURLConnection.java:1340)
        at sun.net.www.protocol.http.HttpURLConnection.getoutputStream(HttpURLConnection.java:1315)
        at hudson.cli.FullDuplexHttpStream.<init>(FullDuplexHttpStream.java:71)
        at hudson.cli.CLI.plainhttpconnection(CLI.java:279)
        at hudson.cli.CLI._main(CLI.java:271)
        at hudson.cli.CLI.main(CLI.java:83)

但是当我检查 Jenkins 的状态时：

● jenkins.service - LSB: Start Jenkins at boot time
   Loaded: loaded (/etc/init.d/jenkins; generated; vendor preset: enabled)
   Active: active (exited) since Sat 2021-06-26 12:26:17 BST; 1min 9s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2269 ExecStop=/etc/init.d/jenkins stop (code=exited,status=0/SUCCESS)
  Process: 2308 ExecStart=/etc/init.d/jenkins start (code=exited,status=0/SUCCESS)

所以我有点困惑。有什么想法吗？

解决方法

遵循这些 steps 而不是下载 war 文件并移动它。