DocValues infinite loop caused by - a call to getMinValue | getMaxValue |
getAverageValue
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Key: LUCENE-1681
URL: https://issues.apache.org/jira/browse/LUCENE-1681
Project: Lucene - Java
Issue Type: Bug
Components: Search
Affects Versions: 2.4.1, 2.4, 2.3.2, 2.3.1, 2.3, 2.2, 2.3.3, 2.4.2, 2.9, 3.0
Reporter: Simon Willnauer
Priority: Minor
Fix For: 2.9
org.apache.lucene.search.function.DocValues offers 3 public (optional) methods
to access value statistics like min, max and average values of the internal
values. A call to one of the methods will result in an infinite loop. The
internal counter is not incremented.
I added a testcase, javadoc and a slightly different implementation to it. I
guess this is not breaking any back compat. as a call to those methodes would
have caused an infinite loop anyway.
I changed the return value of all of those methods to Float.NaN if the
DocValues implementation does not contain any values.
It might be considerable to fix this in 2.4.2 and 2.3.3
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