crossJoinIterator is not using contexts, so queries cannot be cancelled.

[ajnavarro]

Make it use context to be able to stop queries using joins.

[erizocosmico]

I can't reproduce this. Cross join iterator uses context all over the place and passes it down to all other nodes, so there's not any other place where it should be passed.

I also tried in gitbase and the query could be cancelled perfectly fine.