code: public void setDeadline(long sessionDeadline) throws IOException {
      if (failException != null) {
        throw failException;
      }
  
      sessionInfo.deadline = sessionDeadline;
  
      SessionInfo newInfo = new SessionInfo(sessionInfo);
      cmNotifier.addCall(
          new ClusterManagerService.sessionUpdateInfo_args(sessionId, newInfo));
    }
docs: Set the deadline for this session in the ClusterManager
  @param sessionDeadline the deadline for the session
  @throws IOException