mathranger opened a new issue, #2235:
URL: https://github.com/apache/incubator-kie-issues/issues/2235
Very complex conditions are triggering an error that shows up like:
java.lang.NullPointerException: Cannot invoke
"org.drools.core.reteoo.LeftTuple.getTupleSink()" because "lt" is null{}
I have reduced the complexity to 2 rules with similar conditions that differ
where a fact finds itself with respect to an exists() call. The null "lt" is
coming from a search through peers on a child of an ExistsNode. One of the
tuples that get created and associated to this node do not point to the correct
node and we run out of links when searching peers. This happens in the
BetaNode.getStartTuple() method. Either the nodes or the tuples are not
getting constructed correctly.
I have this setup in the attached DroolsPeerNullError.zip file. Extract and
run the main method and the error will be triggered. Changing almost anything
about the conditions stops the error from happening so it is tied closely to
exactly what has been put in this test.
[DroolsPeerNullError.zip](https://github.com/user-attachments/files/25059796/DroolsPeerNullError.zip)
I have tested this on latest release for drools codebases from 7 to 10 and
it is happening on all of them.
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