[xwiki-users] Migrated my xwiki from 4.2 to 8.2.1 getting blank page on access

Hi All, I migrated my Xwiki from version 4.2 to 8.2.1 and I am getting blank page while accessing http://localhost/xwiki the app. In my tomcat I am getting below logs: [ServiceTools] Starting tomcat : Thu Oct 6 10:59:57 2016 Using classpath: :/usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/commons-daemon.jar:/usr/local/tomcat7/bin/tomcat-juli.jar:/usr/local/tomcat7/common/lib/*.jar:/usr/local/tomcat7/lib/annotations-api.jar:/usr/local/tomcat7/lib/catalina-ant.jar:/usr/local/tomcat7/lib/catalina-ha.jar:/usr/local/tomcat7/lib/catalina.jar:/usr/local/tomcat7/lib/catalina-tribes.jar:/usr/local/tomcat7/lib/ecj-4.2.1.jar:/usr/local/tomcat7/lib/el-api.jar:/usr/local/tomcat7/lib/jasper-el.jar:/usr/local/tomcat7/lib/jasper.jar:/usr/local/tomcat7/lib/jsp-api.jar:/usr/local/tomcat7/lib/servlet-api.jar:/usr/local/tomcat7/lib/tomcat-api.jar:/usr/local/tomcat7/lib/tomcat-coyote.jar:/usr/local/tomcat7/lib/tomcat-dbcp.jar:/usr/local/tomcat7/lib/tomcat-i18n-es.jar:/usr/local/tomcat7/lib/tomcat-i18n-fr.jar:/usr/local/tomcat7/lib/tomcat-i18n-ja.jar:/usr/local/tomcat7/lib/tomcat-jdbc.jar:/usr/local/tomcat7/lib/tomcat-util.jar:/usr/local/tomcat7/server/lib/*.jar:/usr/java/jdk-1.7/lib/tools.jar:/usr/local/tomcat7/bin/bootstrap.jar:: 2016-10-06 11:01:12,724 [localhost-startStop-1] INFO o.x.s.s.i.EmbeddedSolrInstance - Starting embedded Solr server... 2016-10-06 11:01:12,777 [localhost-startStop-1] INFO o.x.s.s.i.EmbeddedSolrInstance - Using Solr home directory: [/MIDDLE/kazan-services/xwiki.kazan.priv.atos.fr/permanentdirectory/solr] 2016-10-06 11:01:17,007 [coreLoadExecutor-6-thread-1] WARN o.a.s.c.SolrCore - [xwiki] Solr index directory '/MIDDLE/kazan-services/xwiki.kazan.priv.atos.fr/permanentdirectory/solr/xwiki/data/index' doesn't exist. Creating new index... 2016-10-06 11:01:17,932 [localhost-startStop-1] INFO o.x.s.s.i.EmbeddedSolrInstance - Started embedded Solr server. 2016-10-06 11:01:34,375 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,376 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,376 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,376 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,376 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,376 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,380 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,381 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,382 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,382 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,382 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode 2016-10-06 11:01:34,383 [localhost-startStop-1] WARN o.i.j.ResourceDMBean - ISPN000042: Did not find queried attribute with name coreHashCode Regards, Piyush