FTP 150 File Status OK vs 451 Local Error
FTP 150 (File Status OK) is a 1xx Positive Preliminary response, while 451 (Local Error) is a 4xx Transient Negative response. 150 indicates that the file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer. In contrast, 451 means that requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
Açıklama
The file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer.
Gördüğünüzde
Right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
Nasıl Düzeltilir
No fix needed — this means the transfer is about to start. If the transfer stalls after this reply, check firewall rules blocking the data connection.
Açıklama
Requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
Gördüğünüzde
When the server has an internal issue like a disk I/O error, memory shortage, or filesystem problem during command processing.
Nasıl Düzeltilir
Retry the command. If the error persists, contact the server administrator to check disk health, available memory, and server logs.
Temel Farklar
150 is a 1xx Positive Preliminary response, while 451 is a 4xx Transient Negative response.
FTP 150: The file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer.
FTP 451: Requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
You encounter 150 when right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
You encounter 451 when when the server has an internal issue like a disk I/O error, memory shortage, or filesystem problem during command processing.
Hangisini Ne Zaman Kullanmalı
For 150 (File Status OK): No fix needed — this means the transfer is about to start. If the transfer stalls after this reply, check firewall rules blocking the data connection. For 451 (Local Error): Retry the command. If the error persists, contact the server administrator to check disk health, available memory, and server logs.