Hoss Man created SOLR-6039:
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Summary: debug=track causes debug=query info to be suprsedd when
no results found
Key: SOLR-6039
URL: https://issues.apache.org/jira/browse/SOLR-6039
Project: Solr
Issue Type: Bug
Affects Versions: 4.7
Reporter: Hoss Man
Shamik Bandopadhyay noted on the mailing list that debugQuery=true wasn't
returning info about how the query was being parsed in SolrCloud.
Steps to reproduce...
* startup a simple 2 shard solr cluster using the example configs
* Load this URL:
** http://localhost:8983/solr/select?q=Foo&debug=query
** note that the debug=query causes a debug block including "parsedquery"
showing "title:foo"
* Load either of these URLs:
** http://localhost:8983/solr/select?q=Foo&debug=query&debug=track
** http://localhost:8983/solr/select?q=Foo&debugQuery=true (legacy short hand
option for enabling all debug options)
** Note that the debug block exists, but *only* includes the distributed
"track" options - the query parsing debugging info is not available
* index the sample data (java -jar post.jar *.xml)
* Load either of these URLs:
** http://localhost:8983/solr/select?q=Solr&debugQuery=true&fl=id
** http://localhost:8983/solr/select?q=Solr&debug=query&debug=track&fl=id
** Note that now we have at least one matching doc, and the parsedquery info is
included in the debug block along with the tracking info
* Load either of these URLs:
** http://localhost:8983/solr/select?q=Solr&debug=query&debug=track&rows=0
** http://localhost:8983/solr/select?q=Solr&debug=query&debug=track&rows=0
** Note: even though we have a matching doc, since rows=0 prevents it from
being returned, the parsedquery debug info again no longer works - just the
track debug info
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The work around, for people who want don't care about the newer "debug
tracking" and what the same debug information as pre-4.7, is to enumerate the
debug options (ie: {{debug=query&debug=timing&debug=results}}) instead of
relying on the shorthand: {{debugQuery=true}}
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