thanks Joel. Running with /stream handler did reveal some issues and after
fixing the same the gagtherNodes expr is working!! I am trying out the
recommendations sample from solr website for my use case and now I am
struck at the next step which is unable to get the top 3 of those nodes:
curl --data-urlencode 'expr=top(n="30",
                    sort="count(*) desc",
                    nodes(rec_coll,
                                search(rec_coll,
q="35d40c4b9d6ddfsdf45cbb0fe4aesd75->USER_ID",  fl="ITEM_ID",
sort="ITEM_ID desc", qt="/export"),
                                walk="ITEM_ID->ITEM_ID",
                                gather="USER_ID", fl="USER_ID",
                                maxDocFreq="10000",
                                count(*)))'
http://localhost:8983/solr/rec_coll/graph
Again appreciate any help....

Vidhya
On Thu, Nov 8, 2018 at 1:23 PM Joel Bernstein <[EMAIL PROTECTED]> wrote:
--
Vidhya Kailash