Hoss Man created SOLR-5122:
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Summary: "ArithmeticException: / by zero" using
spellcheck.collateMaxCollectDocs
Key: SOLR-5122
URL: https://issues.apache.org/jira/browse/SOLR-5122
Project: Solr
Issue Type: Bug
Affects Versions: 4.4
Reporter: Hoss Man
As part of SOLR-4952 SpellCheckCollatorTest started using RandomMergePolicy,
and this (aparently) led to a failure in testEstimatedHitCounts.
As far as i can tell: the test assumes that specific values would be returned
as the _estimated_ "hits" for a colleation, and it appears that the change in
MergePolicy however resulted in different segments with different term stats,
causing the estimation code to produce different values then what is expected.
I made a quick attempt to improve the test to:
* expect explicit exact values only when spellcheck.collateMaxCollectDocs is
set such that the "estimate' should actually be exact (ie:
collateMaxCollectDocs == 0 or collateMaxCollectDocs greater then the num docs
in the index
* randomize the values used for collateMaxCollectDocs and confirm that the
estimates are never more then the num docs in the index
This lead to an odd "ArithmeticException: / by zero" error in the test, which
seems to suggest that there is a genuine bug in the code that only gets tickled
in certain mergepolicy/segment/collateMaxCollectDocs combinations.
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