public void disable() {
    if (isRunning) {
      isRunning = false;
      clearAllSessions();
      logger.info("BootstrapSessionManager is disabled.");
    } else {
      logger.warn("BootstrapSessionManager is already disabled.");
    }
  }
Disables the BootstrapSessionManager.
This method should be called when the manager is no longer needed.
Idempotent operation as re-disabling the manager if it is already disabled has no effect.
ambry-store/src/main/java/com/github/ambry/store/BootstrapSessionManager.java