I've configured a sample Apache Solr 4.1 installation using this tutorial. The sample http://localhost:8090/solr (changed the port in server.xml) worked and redirected me to http://localhost:8090/solr/admin with some output.
Now, I've upgraded to Solr 4.3 by stopping tomcat6, removing /var/lib/tomcat6/webapps/solr.war and solr, replacing the solr.war with the new one. After starting tomcat6, /var/lib/tomcat6/webapps/solr gets recreated.
However, http://localhost:8090/solr now throws a 404.
HTTP Status 404 – /
type Status report
message /
description The requested resource () is not available.
Apache Tomcat/6.0.35
It is strange, that it shows no paths, but only when I try to reach something in /solr. When I type in something random, the paths show up correctly in the 404, so something seems to be done by tomcat, but it is not correct.
Best Answer
i ran into a similar problem, it has somthing to do with this: http://lucene.apache.org/solr/4_3_0/changes/Changes.html#4.3.0.upgrading_from_solr_4.2.0 "Slf4j/logging jars are no longer included in the Solr webapp."
you have to do the same as here: https://stackoverflow.com/questions/16415948/solr-4-3-tomcat6-ubuntu-installation-exception
in your case probably: copy all files from example/lib/ext/ to /var/lib/tomcat6/lib/ (lib most likely doesn't exist, so create it)