Method Thread

be/src/util/thread.h:135–136

 private:
  Thread(const std::string& category, const std::string& name)
    : category_(category), name_(name), tid_(UNINITIALISED_THREAD_ID) {}

  /// To distinguish between a thread ID that can't be determined, and one that hasn't
  /// been assigned. Since tid_ is set in the constructor, this value will never be seen