sftp报错：subsystem request for sftp

Jul 30 01:30:46 sa sshd[30511]: Accepted publickey for wangyi from 192.168.188.34 port 53524 ssh2
Jul 30 01:30:46 sa sshd[30511]: pam_unix(sshd:session): session opened for user wangyi by (uid=0)
Jul 30 01:30:46 sa sshd[30515]: subsystem request for sftp
Jul 30 01:30:47 sa sshd[30511]: pam_unix(sshd:session): session closed for user wangyi
Jul 30 01:30:57 sa sshd[30520]: Accepted publickey for wangyi from 192.168.188.34 port 53525 ssh2
Jul 30 01:30:57 sa sshd[30520]: pam_unix(sshd:session): session opened for user wangyi by (uid=0)
Jul 30 01:30:57 sa sshd[30524]: subsystem request for sftp


解决方法：
#Subsystem sftp /usr/libexec/openssh/sftp-server  注释
Subsystem sftp internal-sftp  添加
/etc/init.d/sshd reload