Bug#735792:

[Stephen Nelson]

This part of the build logs is more relevant:

[junit] Tests run: 19, Failures: 1, Errors: 1, Skipped: 1, Time
elapsed: 6.243 sec
    [junit] Test
org.apache.commons.math3.optim.nonlinear.scalar.noderiv.BOBYQAOptimizerTest
FAILED

[junit] Tests run: 19, Failures: 1, Errors: 1, Skipped: 1, Time
elapsed: 6.258 sec
    [junit] Test
org.apache.commons.math3.optimization.direct.BOBYQAOptimizerTest
FAILED

And possibly related to this bug reported upstream:

https://issues.apache.org/jira/browse/MATH-1057