http://www.tpc.org/tpc_documents_current_versions/pdf/tpc-h_v2.17.3.pdf p47 mentions Q11 is:
testdata/workloads/tpch/queries/tpch-q11.test has this hardcoded to imply SF==1, which is fine for our minicluster, but not fine for tests that use code upstream and run in downstream environments on large SFs, like the stress test. On TPCH 10,000 for example this query produces no results. If you apply the correct formula with SF, though, this does produce results.
Possible solutions: dynamically write the query based on SF, or keep a few queries at well-known scale factors.