Hello, guys !
I set a cron job that processes more than 200 transactions.
For 2-3 of them every time I run this job I'm getting :
ClientResponse: POST https://api.demo.globalgatewaye4.firstdata.com/transaction/v20 returned a response status of 504 Gateway Timeout
So, ClientResponse's entity is null.
But then I looked up data on your site in the tab "Transactions" - all records were processed successfully and authorization, sequence# and tag provided for failed records !
My concern is about production (we're going to move to it during the week).
Just curious, if anybody else experiencing the same problem.