The root cause is "gitiles_host" and "gitiles_project", aren't set, however the query for IsolatedTarget.FindIsolateAtOrAftercommitPositionByMaster checks for gitiles_host and gitiles_project.
@robertocn, can you ptal?
Summary: Isolated target index is not populating gitiles fields when ingesting build information (was: Archived isolated binary was not properly used in flake analysis)
Comment 1 by lijeffrey@chromium.org
, Aug 28