[Core] Improved bad error message. (#15663)
[Core] Improved bad error message. (#15663)

* Improved bad error message.

* Update src/ray/raylet/node_manager.cc

Co-authored-by: Clark Zinzow <5f3e059213ced26a35cc43fecafe1f89d235f484@gmail.com>

* lint.

* Add a pid

Co-authored-by: Alex Wu <626ff21a355d0e3508bdddb2128caf9c89091c65@gmail.com>
Co-authored-by: Clark Zinzow <5f3e059213ced26a35cc43fecafe1f89d235f484@gmail.com>
pcmoritz/ray-1,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,ray-project/ray,ray-project/ray