Dominik, We recently had someone on Tika open an issue (https://issues.apache.org/jira/browse/TIKA-1961) for the OOM that Andi fixed by swapping out the piccolo parser. I think I remember you saying that you had some ooxml files that still broke xerces. Would you mind sending those to me so that I can add them to our regression tests on Tika? Thank you.
Best,
Tim
