Communication apparatus, method for controlling communication apparatus, and storage medium

A method for controlling a communication apparatus having a communication interface, the method comprising:

• establishing a plurality of connections with an external apparatus for data transfer;
• executing transfer processing that transfers data to the external apparatus by using the plurality of connections;
• detecting a transfer error in the transfer processing;
• executing, in a case where the transfer error is detected in one connection of the plurality of connections, disconnection processing that disconnects the one connection and also disconnects the other connection of the plurality of connections other than the one connection without waiting for an occurrence of timeout of the other connection, wherein the other connection is a connection in which an error does not occur;
• and
• executing restart processing of the communication interface in accordance with the disconnection processing being executed, and trying to re-establish a plurality of connections with the external apparatus in accordance with the restart processing being completed, wherein
• in the transfer processing, File Transfer Protocol (FTP) or File Transfer Protocol over SSL/TLS (FTPS) is used as a transfer protocol.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute a method for controlling a communication apparatus having a communication interface, the method comprising:

• establishing a plurality of connections with an external apparatus for data transfer;
• executing transfer processing that transfers data to the external apparatus by using the plurality of connections;
• detecting a transfer error in the transfer processing;
• executing, in a case where the transfer error is detected in one connection of the plurality of connections, disconnection processing that disconnects the one connection and also disconnects the other connection of the plurality of connections other than the one connection without waiting for an occurrence of timeout of the other connection, wherein the other connection is a connection in which an error does not occur;
• and
• executing restart processing of the communication interface in accordance with the disconnection processing being executed, and trying to re-establish a plurality of connections with the external apparatus in accordance with the restart processing being completed, wherein
• in the transfer processing, File Transfer Protocol (FTP) or File Transfer Protocol over SSL/TLS (FTPS) is used as a transfer protocol.