[Done v1.3.9e] 1.3.9d duplicate orders

[justin2010]

Hi, I am not 100% sure if I should post here. I searched "duplicate orders" and read through many of them and perhaps my situation is the same, that's because of the IPN and PDT? But I am new to ZC as a user(about 4 months) so please bear with me. Thanks.

Today is the first time my store got a duplicated order. I carefully checked them, they have everything the same including paypal transaction ID. The only differences are the order numbers (the 1st is 313, and the next is 314)and the time: 18 seconds apart. I checked paypal and only found one transaction to the second order.

My store was using 1.3.8a then upgraded to 1.3.9c and now to 1.3.9d for about 1 month. The DB is still 1.3.9c. All transactions after upgrading to 1.3.9d but prior to this order were fine.

Here are the other info about the server:
Linux 2.6.18-164.15.1.el5PAE
PHP Version: 5.2.8 (Zend: 2.2.0)
MySQL 5.0.91-log

It actually is not a big problem because I got the order and money but it may upset my accountant if it keeps happening and possibly scare my customers if they get duplicate order confirmation.

Thank you.


Justin

[shrimp-gumbo-mmmhhh]

Is this your issue?
http://www.zen-cart.com/forum/showthread.php?t=153892

The above fix is to be in the next release.

[justin2010]

Is this your issue?
http://www.zen-cart.com/forum/showthread.php?t=153892

The above fix is to be in the next release.

Thank you for your reply.

I read through that before I post. If I understand it right, here are my conclusion:
1)I am not alone -- thank God
2)Dr. Byte and his buddies are working hard on it.
3)But it seem even DrByte is(was?) not 100% sure how this happen(?) -- apologize if I am wrong.
4)It can't be fixed by just simply switching to PayPal Express? by the way, my store is having a summer sale and I can't really risk anything.
5) If there is no quick fix, all I can do is to cross my fingers and hope it won't happen tomorrow AND wait for the new zen-cart releases. When I was posting the customer already sent me email and asked what happen as she got 2 order confirmations.

Thank you


Justin

[DrByte]

The fix will be in the v1.3.9e release. Stay tuned to the News & Announcements section of the forum for the announcement when it's posted.

[shrimp-gumbo-mmmhhh]

Thank you for your reply.

I read through that before I post. If I understand it right, here are my conclusion:
1)I am not alone -- thank God
2)Dr. Byte and his buddies are working hard on it.
3)But it seem even DrByte is(was?) not 100% sure how this happen(?) -- apologize if I am wrong.
4)It can't be fixed by just simply switching to PayPal Express? by the way, my store is having a summer sale and I can't really risk anything.
5) If there is no quick fix, all I can do is to cross my fingers and hope it won't happen tomorrow AND wait for the new zen-cart releases. When I was posting the customer already sent me email and asked what happen as she got 2 order confirmations.

Thank you


Justin

It happens on again and off again type thing for me.... most people say nothing about it... I just refund as soon as I see it and try to leave a brief explanation. I think it happens when things slow down and the checkout doesn't process quickly... the customer refreshes or something like that.

[justin2010]

It happens on again and off again type thing for me.... most people say nothing about it... I just refund as soon as I see it and try to leave a brief explanation. I think it happens when things slow down and the checkout doesn't process quickly... the customer refreshes or something like that.

It didn't happen today! So perhaps you are right about ..."when things slow down and the checkout doesn't process quickly"...

In my case, the two orders shared the same PayPal transaction id. I can imagine that after PayPal sent the first signal, and then who knows why and how that PayPal thought my store didn't get it and it sent again. Is that PDT and/or IPN or whoever fault, I don't know because I am NOT a programmer. However, I think Zen Cart should have some mechanism to detect and prevent that just seconds after an order confirmation, there comes another order with exactly the same customer name, product, amount of money and transaction id.

I am sure the Zen Cart developers also knew this and will fix it somehow in the next release.

Just for your info(a.k.a "off the topic") I know a true story that a customer found out 4 identical transactions on her VISA statement, and after the investigation, it turns out that 4 transactions were generated from a same checkout in a busy local big name store at the same time. Who knows how it happen!

[DrByte]

I am sure the Zen Cart developers also knew this and will fix it somehow in the next release.

Yes, we do know. And the rather complicated fix is built-in to v1.3.9e.

[justin2010]

Doctor,

Sorry to tell you it was not fixed yet. Last night one customer got 3 order confirmation notification with 3 different order numbers within a minute!!!

The "good" thing is (apparently I try to stay positive) , that's the same customer who got duplicated orders last time. So, it could be the client side's problem.

I am crossing my fingers this will not spread out.

Justin

Yes, we do know. And the rather complicated fix is built-in to v1.3.9e.

[DrByte]

So, one particular customer repeatedly creates duplicate orders in your system, and everyone else doesn't?
I'm inclined to think that the biggest part of the problem in that case is staring you in the face.

Additionally, I've already stated emphatically that the duplicate-order problem that you're complaining about disappears if you use Express Checkout instead of the IPN module (Website Payemnts Standard, which PayPal should have discontinued years ago IMO).

[justin2010]

Actually, there are more than one customer. I just handled one more case 20 minutes ago.

Every time my customers got this problem, I tried it with my own credit card and my paypal account, but I had never experienced this for myself. However, I noticed those customers were all using their paypal accounts. That means they are more experienced online shoppers and unlikely make mistakes. One of them told me that she experienced this problem only in my store.

Hopefully this info helps. Also this morning, the customer stuck at the page of "receipt" after she came back from paypal.

Anyway, thank you for your reply. I will upgrade to 1.3.9f this weekend and switch to express checkout.

have a good weekend. cheers

Justin