Our Jenkins is running behind Nginx over SSL, then proxy-passed to Winstone. It has been working fine, but today I upgraded from I think 1.486 to 1.500 just to discover that the Win XP slave is not able to connect. The slave-agent.jnlp was somehow not working. When I run it from the CLI I discovered that it's trying to connect to http://, although the config is set to https://, then it gets 301 Moved Permanently from Nginx, and since it is unable to handle it, it just dies with a SEVERE error.

Feb 3, 2013 1:39:24 PM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Hudson agent is running in headless mode.
Feb 3, 2013 1:39:24 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among http://.../jenkins/ # SHOULD BE HTTPS!!!
Feb 3, 2013 1:39:24 PM hudson.remoting.jnlp.Main$CuiListener error
SEVERE: http://.../jenkins/tcpSlaveAgentListener/ is invalid: 30
1 Moved Permanently
java.lang.Exception: http://.../jenkins/tcpSlaveAgentListener/ i
s invalid: 301 Moved Permanently
at hudson.remoting.Engine.run(Engine.java:168)

So
1) Why does it use http instead of https when the settings are clear?
2) Why is it unable to handle 302?

Thanks a lot!

Cheers,
Ondra Kupka