[jira] [Created] (SOLR-6832) Queries be served locally rather than being forwarded to another replica

["Sachin Goyal (JIRA)" <ji...@apache.org>]

Sachin Goyal created SOLR-6832:
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             Summary: Queries be served locally rather than being forwarded to another replica
                 Key: SOLR-6832
                 URL: https://issues.apache.org/jira/browse/SOLR-6832
             Project: Solr
          Issue Type: Bug
          Components: SolrCloud
    Affects Versions: 4.10.2
            Reporter: Sachin Goyal


Currently, I see that code flow for a query in SolrCloud is as follows:

For distributed query:
SolrCore -> SearchHandler.handleRequestBody() -> HttpShardHandler.submit()

For non-distributed query:
SolrCore -> SearchHandler.handleRequestBody() -> QueryComponent.process()

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For a distributed query, the request is always sent to all the shards even if the originating SolrCore (handling the original distributed query) is a replica of one of the shards.
If the original Solr-Core can check itself before sending http requests for any shard, we can probably save some network hopping and gain some performance.

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We can change SearchHandler.handleRequestBody() or HttpShardHandler.submit() to fix this behavior (most likely the former and not the latter).



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