Hoss Man created SOLR-13474:
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             Summary: Fix "Search is temporarily disabled" logic to be 
consistent for entire request
                 Key: SOLR-13474
                 URL: https://issues.apache.org/jira/browse/SOLR-13474
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Hoss Man
            Assignee: Hoss Man


Where/How the "Search is temporarily disabled" logic was added in SOLR-12999 
can result in some weird failure cases (examples: SOLR-13470 & SOLR-13471) due 
to the fact that  (as currently implemented) some portions of processing a 
SolrQueryRequest may see a valid searcher, but later other code paths will get 
an error when trying to use the same searcher.

I think it would make more sense to move the "searchEnabled" logic out of 
{{SolrQueryRequestbase.getSearcher()}} and into {{SolrCore.getSearcher()}} 
(removing the need for {{SolrCore.isSearchEnabled()}} ).

This will:
 * restore the long standing (and widly assumed by code) behavior of 
{{SolrQueryRequestbase.getSearcher()}} that it will always return a consistent 
result
 * ensure that any custom plugins trying to call {{SolrCore.getSearcher()}} 
directly will also get the benefits of the safety checks introduced in 
SOLR-12999



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