solr-duplicate post management

[S.Selvam Siva]

Hi,

I have 6 fields in my solr-schema.
   1)id(unique key)
   2)urlid
   3)url
    and so on to 6)

We have been posting  3 to 4 lakh .xml files per day which includes 50%
duplicate posts.

what i need is ,to log the existing urlid and new urlid(of course both will
not be same) ,when a .xml file of same id(unique field) is posted.

I want to make this by modifying the solr source.Which file do i need to
modify so that i could get the above details in log ?

I tried with DirectUpdateHandler2.java(which removes the duplicate
entries),but efforts in vein.


-- 
Yours,
S.Selvam