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https://issues.apache.org/jira/browse/SOLR-18195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18074945#comment-18074945
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Chris M. Hostetter commented on SOLR-18195:
-------------------------------------------
{{CombinedQuerySolrCloudTest.testQueriesWithFacetAndHighlightsCollapse}} has
started failing in ~36% of all jenkins builds in the past 7 days ... which
seems suspiciously timed with this jira?
It looks like there is probably a "test method ordering" / "lack of cleanup by
the test methods" issue, because this method specific reproduce line from
jenkins seems to pass reliably on my machine...
{noformat}
gradlew test --tests
CombinedQuerySolrCloudTest.testQueriesWithFacetAndHighlightsCollapse
-Dtests.seed=75A3A0E11F683B2C -Dtests.multiplier=2 -Dtests.locale=bho
-Dtests.timezone=Antarctica/Syowa -Dtests.asserts=true
-Dtests.file.encoding=UTF-8
{noformat}
...but if i run the whole testclass with that seed the jenkins assertion
failures reproduces reliably for me...
{noformat}
./gradlew test --tests CombinedQuerySolrCloudTest -Dtests.seed=75A3A0E11F683B2C
-Dtests.multiplier=2 -Dtests.locale=bho -Dtests.timezone=Antarctica/Syowa
-Dtests.asserts=true -Dtests.file.encoding=UTF-8
...
> java.lang.AssertionError: .response[0][id][0]:1!10!=2!2
> at
__randomizedtesting.SeedInfo.seed([75A3A0E11F683B2C:7E860A8E0497562E]:0)
> at org.junit.Assert.fail(Assert.java:89)
> at
org.apache.solr.BaseDistributedSearchTestCase.compareSolrResponses(BaseDistributedSearchTestCase.java:975)
> at
org.apache.solr.BaseDistributedSearchTestCase.compareResponses(BaseDistributedSearchTestCase.java:1005)
> at
org.apache.solr.BaseDistributedSearchTestCase.query(BaseDistributedSearchTestCase.java:642)
> at
org.apache.solr.BaseDistributedSearchTestCase.query(BaseDistributedSearchTestCase.java:621)
> at
org.apache.solr.BaseDistributedSearchTestCase.query(BaseDistributedSearchTestCase.java:609)
> at
org.apache.solr.handler.component.CombinedQuerySolrCloudTest.testQueriesWithFacetAndHighlightsCollapse(CombinedQuerySolrCloudTest.java:321)
{noformat}
> Support for Collapse Results in Combined Query Component
> --------------------------------------------------------
>
> Key: SOLR-18195
> URL: https://issues.apache.org/jira/browse/SOLR-18195
> Project: Solr
> Issue Type: Improvement
> Components: vector-search
> Reporter: Sonu Sharma
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> With reference to previous new Query Component Feature:
> https://issues.apache.org/jira/browse/SOLR-17319
> When using \{!collapse} with CombinedQueryComponent (hybrid search / RRF),
> duplicate documents appear in the result set for the same collapse field
> value. Each sub-query independently collapses correctly via
> CollapsingPostFilter, but simpleCombine() merges results by Lucene doc ID
> only - it has no awareness of the collapse field. Different sub-queries may
> select different group heads for the same field value, and both survive the
> merge.
> However it is well know limitation that :[ "In order to use these features
> with SolrCloud, the documents must be located on the same
> shard."|https://solr.apache.org/guide/solr/latest/query-guide/collapse-and-expand-results.html]
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