Unable to find plugins in list of available plugins in jenkins

Question

I have installed Jenkins by deploying its WAR file to Tomcat. On typing

http://localhost:8080/jenkins

In browser

Answer 1

I came across this SO answer while I was experiencing the same issue. When I would click "Check Now" to force Jenkins to download the latest list, my browser would just hang. It wasn't until I tailed the Jenkins log that I found this here:

Mar 10, 2014 1:15:54 PM hudson.security.csrf.CrumbFilter doFilter
WARNING: No valid crumb was included in request for /administrativeMonitor/hudson.diagnosis.ReverseProxySetupMonitor/test.  Returning 403.

Looks like the issue has to do with how I've put Jenkins behind a reverse proxy and enabled the option to prevent Cross Site Request Forgery. Once I disabled that, the "Check Now" completed within 30 seconds.