Luc Maisonobe created MATH-950:
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Summary: event state not updated if an unrelated event triggers a
RESET_STATE during ODE integration
Key: MATH-950
URL: https://issues.apache.org/jira/browse/MATH-950
Project: Commons Math
Issue Type: Bug
Affects Versions: 3.1.1
Reporter: Luc Maisonobe
Assignee: Luc Maisonobe
Priority: Critical
Fix For: 3.2
When an ODE solver manages several different event types, there are some
unwanted side effects.
If one event handler asks for a RESET_STATE (for integration state) when its
eventOccurred method is called, the other event handlers that did not trigger
an event in the same step are not updated correctly, due to an early return.
As a result, when the next step is processed with a reset integration state,
the forgotten event still refer to the start date of the previous state. This
implies that when these event handlers will be checked for In some cases, the
function defining an event g(double t, double[] y) is called with state
parameters y that are completely wrong. In one case when the y array should
have contained values between -1 and +1, one function call got values up to
1.0e20.
The attached file reproduces the problem.
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