问题
I get the following connection error while updating IntelliJ behind proxy (the proxy ping in IntelliJ is working though):
Connection Error: Failed to prepare an update: Cannot download 'http://download.jetbrains.com/idea/IU-xxx-patch-win.jar': Connection closed at byte 17920. Expected 20941088 bytes. , response: 200 OK Open download page.
Solution?
I was able to download the file ...patch-win.jar via a browser. How can I now install this patch manually for IntelliJ in a Windows environment?
回答1:
java -jar IU-xxx-patch-win.jar "C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2017.1"
(replace with the actual IntelliJ IDEA installation location on your system).
来源：https://stackoverflow.com/questions/43364476/how-to-manually-install-intellij-idea-patch-update