“Can you ask Sam about that? Stacker is his domain”, “I’d rather let Josh look at the router, he wrote it”, “Jon is better versed in associations, send it to him”.
The natural progression of programs is towards the territorial. When a programmer has weaved an intricate web of considerable complexity, others are loathe to enter his lair and he is loathe for them to do so.
This is despite the fact that we all agree that it’s bad for programs to become territorial. When only one or a few people know how to work on something, you get bottlenecks where progress is stunted until the master is ready. You risk the hit-by-a-bus factor where nobody knows how the system works if the master leaves. You ensure the annoyance of stakeholders who can’t understand why another minion can’t fix his urgent problem.
But this problem can’t be solved with a slogan. You can proclaim that “we shouldn’t have territorial parts of our program” until you turn blue, but nothing is going to change until you accept the cost of avoidance.
The first step of acceptance is to recognize that sending someone fresh in to fix a single issue in a complex part of the code is expensive. It’s going to take Pratik five to ten times the effort to fix a single issue in Stacker that it’s going to take Sam. And the odds are that even that is not enough to appreciate the internal coherency of the system, which means that the fix is likely to be a butcher’s job, and Sam will have to rewrite it afterwards anyway.
To broaden the base of knowledge, you’re going to have to let someone else not only spend considerable effort getting up to speed. Then you’re going to have them deal with more than just a quick fix. Let them deal with a raft of issues and let them spend the time of the original creator to learn it all.
To do all that, they can’t do anything else at the same time. That feature you want do is now going to be pushed a few days or a a week out. Until you’re ready to delay things you really want done, it’s fruitless to bemoan that parts of the code base territorial.