Github user LosD commented on the issue:
https://github.com/apache/metamodel/pull/205
Error might be unrelated. All runs are good, except on OracleJDK8, where an
Excel test fails inside Apache POI.
It could easily be the Excel context that has issues. We recently changed
it, and it has had some timing problems previously. Of course, the closing of
the result set could change the timing slightly, exposing a problem.---
