Loop on httpjob

Hi all
I m using a short for loop to send a poststring http job to a mysql server... (as I need to send a list)
This works fine most of the time but occasionally some of the posts do not reach server...
And I doubt get a server response
Is this the right way to send an array?
What am I doing wrong?
If the http job failed does it repeat automatically or should I check for its failure and resend ?

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