[MATH-1294] Fix potential race condition in PolynomialUtils. Thanks to Kamil Włodarczyk
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@ -54,6 +54,11 @@ If the output is not quite correct, check for invisible trailing spaces!
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</release>
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<release version="4.0" date="XXXX-XX-XX" description="">
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<action dev="tn" type="fix" issue="MATH-1294" due-to="Kamil Włodarczyk"> <!-- backported to 3.6 -->
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Fixed potential race condition in PolynomialUtils#buildPolynomial in
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case polynomials are generated from multiple threads. Furthermore, the
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synchronization is now performed on the coefficient list instead of the class.
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</action>
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<action dev="psteitz" type="update" issue="MATH-1246">
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Added bootstrap method to 2-sample KolmogorovSmirnovTest.
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</action>
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@ -365,8 +365,8 @@ public class PolynomialsUtils {
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final List<BigFraction> coefficients,
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final RecurrenceCoefficientsGenerator generator) {
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final int maxDegree = (int) FastMath.floor(FastMath.sqrt(2 * coefficients.size())) - 1;
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synchronized (PolynomialsUtils.class) {
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synchronized (coefficients) {
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final int maxDegree = (int) FastMath.floor(FastMath.sqrt(2 * coefficients.size())) - 1;
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if (degree > maxDegree) {
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computeUpToDegree(degree, maxDegree, generator, coefficients);
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}
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