FTP 110 Restart Marker Reply vs 450 File Action Not Taken
FTP 110 (Restart Marker Reply) is a 1xx Positive Preliminary response, while 450 (File Action Not Taken) is a 4xx Transient Negative response. 110 indicates that the server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted. 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.
描述
The server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted.
何时出现
During a resumed file transfer when the server confirms the restart position in the data stream.
如何修复
No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects.
描述
Requested file action not taken. The file is unavailable due to being busy, locked by another process, or temporarily inaccessible.
何时出现
When you try to access a file that is locked by another user or process, or when the server temporarily cannot process the file.
如何修复
Wait and retry the operation — the file may be locked by another transfer. If persistent, check server-side file locks and permissions.
主要区别
110 is a 1xx Positive Preliminary response, while 450 is a 4xx Transient Negative response.
FTP 110: The server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted.
FTP 450: Requested file action not taken. The file is unavailable due to being busy, locked by another process, or temporarily inaccessible.
You encounter 110 when during a resumed file transfer when the server confirms the restart position in the data stream.
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.
何时使用哪个
For 110 (Restart Marker Reply): No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects. 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.