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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