FTP 125 Data Connection Open vs 450 File Action Not Taken
FTP 125 (Data Connection Open) is a 1xx Positive Preliminary response, while 450 (File Action Not Taken) is a 4xx Transient Negative response. 125 indicates that the data connection is already open and the transfer is beginning. No need to open a new data connection. In contrast, 450 means that requested file action not taken. The file is unavailable due to being busy, locked by another process, or temporarily inaccessible.
الوصف
The data connection is already open and the transfer is beginning. No need to open a new data connection.
متى تراه
When the server reuses an existing data connection for a file transfer instead of opening a new one.
كيفية الإصلاح
No fix needed — the transfer is starting immediately. Your client should begin reading or writing data on the existing connection.
الوصف
Requested file action not taken. The file is unavailable due to being busy, locked by another process, or temporarily inaccessible.
متى تراه
When you try to access a file that is locked by another user or process, or when the server temporarily cannot process the file.
كيفية الإصلاح
Wait and retry the operation — the file may be locked by another transfer. If persistent, check server-side file locks and permissions.
الفروق الرئيسية
125 is a 1xx Positive Preliminary response, while 450 is a 4xx Transient Negative response.
FTP 125: The data connection is already open and the transfer is beginning. No need to open a new data connection.
FTP 450: Requested file action not taken. The file is unavailable due to being busy, locked by another process, or temporarily inaccessible.
You encounter 125 when when the server reuses an existing data connection for a file transfer instead of opening a new one.
You encounter 450 when when you try to access a file that is locked by another user or process, or when the server temporarily cannot process the file.
متى تستخدم أيًا منهما
For 125 (Data Connection Open): No fix needed — the transfer is starting immediately. Your client should begin reading or writing data on the existing connection. For 450 (File Action Not Taken): Wait and retry the operation — the file may be locked by another transfer. If persistent, check server-side file locks and permissions.