./mongod --configsvr --dbpath /Users/haoke/data/mongodb/sharded_cluster/conf/data --port 27100 --logpath /Users/haoke/data/mongodb/sharded_cluster/conf/log --fork --directoryperdb
about to fork child process, waiting until server is ready for connections.
forked process: 68499
ERROR: child process failed, exited with error number 1