Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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None
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None
Description
discovered as part of SOLR-10807...
when using Points based numerics, the HLL estimates using the raw values vs the hashed values disagree slightly – this suggests some possible bug (or the very least: room for optimization) when using Points fields.
Example from SOLR-10807 when swaping IntPointField in place of TrieIntField...
[junit4] 2> NOTE: reproduce with: ant test -Dtestcase=TestDistributedStatsComponentCardinality -Dtests.method=test -Dtests.seed=63854996088ED7B7 -Dtests.slow=true -Dtests.locale=de-GR -Dtests.timezone=Etc/UCT -Dtests.asserts=true -Dtests.file.encoding=ISO-8859-1 [junit4] FAILURE 13.3s J2 | TestDistributedStatsComponentCardinality.test <<< [junit4] > Throwable #1: java.lang.AssertionError: int_i: hashed vs prehashed, real=7260, p=q=id:[1186+TO+8445]&rows=0&stats=true&stats.field={!cardinality%3Dtrue+hllLog2m%3D7+hllRegwidth%3D8}int_i&stats.field={!cardinality%3Dtrue+hllLog2m%3D7+hllRegwidth%3D8+hllPreHashed%3Dtrue}int_i_prehashed_l&stats.field={!cardinality%3Dtrue+hllLog2m%3D7+hllRegwidth%3D8}long_l&stats.field={!cardinality%3Dtrue+hllLog2m%3D7+hllRegwidth%3D8+hllPreHashed%3Dtrue}long_l_prehashed_l&stats.field={!cardinality%3Dtrue+hllLog2m%3D7+hllRegwidth%3D8}string_s&stats.field={!cardinality%3Dtrue+hllLog2m%3D7+hllRegwidth%3D8+hllPreHashed%3Dtrue}string_s_prehashed_l expected:<6632> but was:<7929> [junit4] > at __randomizedtesting.SeedInfo.seed([63854996088ED7B7:EBD1764CA672BA4F]:0) [junit4] > at org.apache.solr.handler.component.TestDistributedStatsComponentCardinality.test(TestDistributedStatsComponentCardinality.java:149)
Attachments
Issue Links
- is duplicated by
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- Resolved
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- relates to
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SOLR-10807 Randomize PointFields in all tests unless explicit reason not to
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- Closed
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- links to
