While Gopal is correct, having a is not mandatory,
if you're using SolrCloud, it _is_ necessary. And I don't know the
internals of the Flume Solr Sink, but if it uses CloudSolrServer
under the covers I'd be surprised if it worked without a
defined. And I'd guess it does use CloudSolrServer.
The
Do you have this tag "id" define in your schema , it
is not mandatory to have unique field but if you need it then u have to
provide it else you can remove it, see below wiki page for more details
http://wiki.apache.org/solr/SchemaXml#The_Unique_Key_Field
Some options to generate this field if yo
