Hello @nagaraj1991,
what version of Solr do you have installed? SAS recommends 5.5.5.
http://support.sas.com/kb/61/590.html
http://support.sas.com/kb/61/324.html
For your solution, you would need to ensure that all the configuration modifications are applied. I wonder if any of those (or permissions) did change before your restart.
In any case: please check the logs of your Solr service, and check for errors or warnings, specially regarding indexing.
Check this: http://support.sas.com/kb/61/077.html