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https://issues.apache.org/jira/browse/SOLR-6813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14247963#comment-14247963
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Per Steffensen commented on SOLR-6813:
--------------------------------------
I would prefer making it work instead of saying that single-pass in not
supported for expand-queries. But I guess that is easy for me to say :-)
If I understand you explanations correctly, expand-queries ought to (almost)
always fail for distributed. Also when rows/start is not set (default start=0
and rows=10). Can you explain why it does not fail in those cases
{code}
query("q", "*:*", "fq", "{!collapse field="+group+"}", "defType",
"edismax", "bf", "field(test_ti)", "expand", "true", "fl","*,score",
ShardParams.DISTRIB_SINGLE_PASS, "true");
query("q", "*:*", "fq", "{!collapse field="+group+"}", "defType",
"edismax", "bf", "field(test_ti)", "expand", "true", "expand.sort", "test_tl
desc", "fl","*,score", ShardParams.DISTRIB_SINGLE_PASS, "true");
query("q", "*:*", "fq", "{!collapse field="+group+"}", "defType",
"edismax", "bf", "field(test_ti)", "expand", "true", "expand.sort", "test_tl
desc", "expand.rows", "1", "fl","*,score", ShardParams.DISTRIB_SINGLE_PASS,
"true");
//Test no expand results
query("q", "test_ti:5", "fq", "{!collapse field="+group+"}", "defType",
"edismax", "bf", "field(test_ti)", "expand", "true", "expand.sort", "test_tl
desc", "expand.rows", "1", "fl","*,score", ShardParams.DISTRIB_SINGLE_PASS,
"true");
//Test zero results
query("q", "test_ti:5434343", "fq", "{!collapse field="+group+"}",
"defType", "edismax", "bf", "field(test_ti)", "expand", "true", "expand.sort",
"test_tl desc", "expand.rows", "1", "fl","*,score",
ShardParams.DISTRIB_SINGLE_PASS, "true");
//Test page 2
query("q", "*:*", "start","1", "rows", "1", "fq", "{!collapse
field="+group+"}", "defType", "edismax", "bf", "field(test_ti)", "expand",
"true", "fl","*,score", ShardParams.DISTRIB_SINGLE_PASS, "true");
{code}
Only the last one above fails?
> distrib.singlePass does not work for expand-request - start/rows included
> -------------------------------------------------------------------------
>
> Key: SOLR-6813
> URL: https://issues.apache.org/jira/browse/SOLR-6813
> Project: Solr
> Issue Type: Bug
> Components: multicore, search
> Reporter: Per Steffensen
> Assignee: Joel Bernstein
> Labels: distributed_search, search
> Attachments: test_that_reveals_the_problem.patch
>
>
> Using distrib.singlePass does not work for expand-requests. Even after the
> fix provided to SOLR-6812, it does not work for requests where you add start
> and/or rows.
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