portstat/teamshow/aclshow sometimes fails to connect to database

[sihuihan88]

When calling the portstat, teamshow or aclshow, sometimes it keeps trying to connect to database and stuck forever. The output is as follows. This issue is random and not happen every time.

^CTraceback (most recent call last):
  File "/usr/bin/portstat", line 333, in <module>
    main()
  File "/usr/bin/portstat", line 285, in main
    portstat = Portstat()
  File "/usr/bin/portstat", line 54, in __init__
    self.db.connect(self.db.COUNTERS_DB)
  File "/usr/local/lib/python2.7/dist-packages/swsssdk/interface.py", line 179, in connect
    self._persistent_connect(db_name)
  File "/usr/local/lib/python2.7/dist-packages/swsssdk/interface.py", line 210, in _persistent_connect
    time.sleep(t_wait)
KeyboardInterrupt
root@str-a7050-acs-1:/home/admin# portstat