> Caused by: java.lang.ArithmeticException: / by zero
> at org.optaplanner.core.impl.heuristic.selector.value.chained.DefaultSubChainSelector.constructCache (DefaultSubChainSelector.java:139)

That DefaultSubChainSelector builds a List<SubChain> anchorTrailingChainList to cache some info,
to answer faster when having to select the next subchain.

When doing that, it presumes the anchorList.size() != 0, when giving a good capacity estimate.
That's clearly a bug.

int anchorChainInitialCapacity = ((int) valueSize / anchorList.size()) + 1;