Couldn't index items. Check the logs for details.

Hi,

This is a fresh drupal installation.
Setup Solr 4.6 with jetty following the instructions here (per documentation)

Solr working just fine. Configured the server through module's configuration. Enabled the default index and when I try to index I keep getting this error message "Couldn't index items. Check the logs for details".

I am checking log files; I have 3 of them. 1 for jetty and 2 for solr. But I see nothing useful.
out.log --> Nothing
stderrorout.log --> Nothing
request.log --> Looks just fine. Only 1 line with 400 response. I am not sure if that is something I should worry about but sure it is not helpful.

I want to troubleshoot the problem but have no idea how, if I can't get something from the logs.

Please help....
Thanks