Tuning FTP/SFTP Timeouts for Downloading Files from FTP/SFTP

Default EagleML includes (getftpfile.inc and getsftpfile.inc) have a 60 second timeout set for downloading file from FTP/SFTP. This timeout is constant and cannot be set as a variable.

However, there is a pair of parameters which can help handle this process.

    For FTP:

FTP_RE_TRY_MAX_CNT  - max number of attempts to execute the command to download a file from FTP (5 attempts by default)
FTP_RE_TRY_ATT_INTERVAL - time in seconds between these attempts

    For SFTP:

S​FTP_RE_TRY_MAX_CNT  - max number of attempts to execute the command to download a file from SFTP (5 attempts by default)
SFTP_RE_TRY_ATT_INTERVAL - time in seconds between these attempts

In some specific cases, the MSGEXCHANGE/RUNPREPROCESSOR can fail in a couple of seconds (e.g., the CURL command is not valid) , which will make 5 default attempts expire too soon. Increasing the interval between attempts and the number of attempts can help with such issue.

Also, most  FTP/SFTP downloads are failed by the 60sec timeout and 5 attempts with 1 sec interval by default is typically enough. Below is the common scenario of the process, when the file is missing on FTP/SFTP:

• Include is called

• First download attempt

• MSGEXCHANGE/RUNPREPROCESSOR fail after the 60sec timeout (file is missing on FTP/SFTP)

• First download attempt is recognized as failed

• Idle time set by FTP_RE_TRY_ATT_INTERVAL (1 second by default)

• Second download attempt

When the number for the next attempt exceeds FTP_RE_TRY_MAX_CNT while the file has not been downloaded, an error is displayed.

Expected Total Timings for One File

Usual scenario (MSGEXCHANGE/RUNPREPROCESSOR attempt fails after the 60sec timeout):
Total timeout = FTP_RE_TRY_MAX_CNT (default=5) * 60 seconds = 300 seconds by default

Unusual  scenario (MSGEXCHANGE/RUNPREPROCESSOR fails in a matter of seconds):
Total timeout = FTP_RE_TRY_MAX_CNT (default=5) * FTP_RE_TRY_ATT_INTERVAL