Have you tried running a very simple expression first. For example does this run:
random(gettingstarted, q="*:*", fl="id", rows="200") Joel Bernstein http://joelsolr.blogspot.com/ On Tue, Sep 19, 2017 at 4:56 PM, Aurélien MAZOYER < aurelien.mazo...@francelabs.com> wrote: > Hi, > > > > I wanted to try the new scoreNodes stream expression that is used to make > recommendations: > > https://cwiki.apache.org/confluence/display/solr/Graph+ > Traversal#GraphTraver > sal-UsingthescoreNodesFunctiontoMakeaRecommendation > > but encountered some issue with it. > > > > The following steps can easily reproduce the problem: > > I started Solr (6.6.1) in cloud mode : > > solr -e cloud -noprompt > > then run the following command in exampledocs to index the sample data : > > java -Dc=gettingstarted -jar post.jar *.xml > > and to finish copy/paste the following expression in the stream tab: > > scoreNodes(top(n=25, > > sort="count(*) desc", > > nodes(gettingstarted, > > random(gettingstarted, q="*:*", > fl="id", rows="200"), > > walk="id->id", > > gather="id", > > count(*)))) > > (yes I now that my stream expression does nothing usefull :-P). > > Anyway, I got the following exception when I run the query: > > "EXCEPTION": "org.apache.solr.client.solrj.SolrServerException: No > collection param specified on request and no default collection has been > set.", > > Any idea of what i did wrong? > > > > Thank you, > > > > Regards, > > > > Aurélien > > > > > > > >
