People keep asking how to traverse tbb::concurrent_hash_map concurrently with other operations. But it wouldn’t be worth the blog if there was not any problem. The Reference clearly states that:
I've noticed that developers who start using TBB often ask questions "Whether I should replace STL containers (protected with locks where necessary) by their TBB counterparts in my application? Are TBB containers faster that those from STL?". Unfortunately questions formulated like this are too general to get a specific answer.