Multiple hanged FTP processes

UNIX Solaris
1

Hello people,

I got one problem with a script.

I have a script which runs every five mins and in the script an ftp process is invoked which sends files to a particular location.

The problem is that the ftp process hangs every now and then which causes the whole script to hang.

As the script runs every 5 mins, it invokes an ftp process again and this hanging of ftp process causes the script to be hanged multiple times and in the end a lot of hanged ftp processes and a lot of hanged script processes.

Please someone give me a way so that these ftp process don't get hanged and file transfer is successful without causing the scripts and ftp processes to hang.

2

Can you show us the script? First we need to check why the ftp query gets stuck. You may want to use -i (disables interactive mode) and -T (sets TTL) switches with the ftp command to avoid getting stuck. But first we need to check the code!

3

Dear Admin_xor,

Thanks for your response.

following is the ftp part of the script.

#!/bin/sh
PATTERN=`date +%Y%m%d`
USERNAME=xxx
PASSWORD=xxx
IP=x.x.x.x

ftp -inv $IP << END
quote USER $USERNAME
quote PASS $PASSWORD
asc
cd /files/123Files
lcd /records
mput Files*.unl
lcd /records2
mput Files2*.unl
quit
END

As the script runs every 5 mins, I have observed that when the script does not complete and as 5 mins pass, the script is executed again and another ftp process gets started.

How can I stop such thing to happen?

4

Better use the FLAGGING mechanism, to avoid dupicate trigger of script.

#!/bin/sh
PATTERN=`date +%Y%m%d`
USERNAME=xxx
PASSWORD=xxx
IP=x.x.x.x
 
touch ftpProcessing.lck // When script triggered, will create the lck file
 
ftp -inv $IP << END
quote USER $USERNAME
quote PASS $PASSWORD
asc
cd /files/123Files
lcd /records
mput Files*.unl
lcd /records2
mput Files2*.unl
quit
END
 
rm ftpProcessing.lck // remove once ftp process completed

Also make a change in cron file,

* * * * * ! [ -f ftpProcessing.lck ] && sh <scriptname>
5

Dear Rksiva,

Thanks for the solution. I will implement and check it.