I am new to Solr, after installing it in ubuntu 8.10, when I was trying exampledocs to index , as per this link, I got this error:
HTTP ERROR: 404 m
In my case it was happening due to versioning.
Earlier I was using solr 1.4.1. It was running fine. Then I installed solr 3.6.1 and was getting this error.
A folder named solr is there in the tomcat/webapps directory where you generally put the solr.war file.
=> Problem is gone.