[jira] [Created] (SOLR-5745) Add an UpdateRequest parameter that lets request wait until no searchers are warming before committing

["Colin Bartolome (JIRA)" <ji...@apache.org>]

Colin Bartolome created SOLR-5745:
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             Summary: Add an UpdateRequest parameter that lets request wait until no searchers are warming before committing
                 Key: SOLR-5745
                 URL: https://issues.apache.org/jira/browse/SOLR-5745
             Project: Solr
          Issue Type: New Feature
          Components: clients - java
    Affects Versions: 4.2.1
            Reporter: Colin Bartolome
            Priority: Minor


In order to avoid "Overlapping onDeckSearchers=2" warnings, we'd like to set {{maxWarmingSearchers=1}} in {{solrconfig.xml}}. If we do that, though, and happen to request a hard commit while an automatic soft commit is already processing, we get an error like this:

{code}
Error opening new searcher. exceeded limit of maxWarmingSearchers=1, try again later.
{code}

and the request fails.

What we'd like to see is for {{UpdateRequest}} to support a parameter, similar to the existing {{waitSearcher}} parameter, that instructs the server to hold the request until no other searchers were currently warming. (Or, more precisely, until the request could proceed without exceeding {{maxWarmingSearchers}}.)

It seems something like this could eliminate the performance penalty of having multiple on-deck searchers without the unpredictable errors caused by setting {{maxWarmingSearchers=1}}. The performance penalty moves to a place that expects it: the code that requested a commit and said it was willing to wait.



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