log err if fail to open file for read and donot remove item if the file should exist
log err if fail to open file for read and donot remove item if the file should exist

mruse/beansdb,mruse/beansdb,mruse/beansdb,mruse/beansdb,donglei/beansdb,donglei/beansdb,donglei/beansdb,donglei/beansdb