bugfix: thanks to xiaofeng yu <3wdays at gmail>
bugfix: thanks to xiaofeng yu <3wdays at gmail>

amyvmiwei/beansdb,amyvmiwei/beansdb,mruse/beansdb,donglei/beansdb,mruse/beansdb,amyvmiwei/beansdb,mashuai/beansdb,mashuai/beansdb,mruse/beansdb,mashuai/beansdb,donglei/beansdb,mashuai/beansdb,amyvmiwei/beansdb,donglei/beansdb,mruse/beansdb,donglei/beansdb