Kamil Włodarczyk created MATH-1294:
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Summary: Data race PolynomialUtils::buildPolynomial
Key: MATH-1294
URL: https://issues.apache.org/jira/browse/MATH-1294
Project: Commons Math
Issue Type: Bug
Affects Versions: 4.0
Reporter: Kamil Włodarczyk
Priority: Minor
If you run PolynomialUtilsTest methods concurrently there will occur problem
with ComparisonFailure due to incorrect building of coefficient list.
https://github.com/apache/commons-math/blob/master/src/main/java/org/apache/commons/math4/analysis/polynomials/PolynomialsUtils.java#L368
should be in synchronized block. Explanation: polynomial of given degree can
be created by other thread and when primary thread access synchronized block,
there is already created coefficients for this degree, therefore no
coefficients should be added to coefficients list.
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