verifyReceipt The underlying connection was closed: An unexpected error occurred on a send

Question

testing321 OP

Created Mar ’24

Replies 3

Boosts 0

Participants 3

Hi,

Starting this weekend our backend fails to connect to the production Apple verifyReceipt endpoint.

It's a C# .NET service running on windows server.
The full exception received is: Exception: "The underlying connection was closed: An unexpected error occurred on a send". Inner Exception: "Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host".

Is someone else facing a similar issue? sending a request to the Apple production verifyReceipt URL via Postman (located on the same server) succeeds.

Thanks in advance...

Boost

Answer 1

testing321 OP

Mar ’24

Hi,

Wanted to update that the problem was solved once the service was build with .NET 4.7 (it was initially .NET 4.5.2).

0

Answer 2

zbynekcz OP

Mar ’24

Hello, I have the same problem. But the project uses .NET 4.8. Have you changed anything else? Thanks

0

Answer 3

wuhaowinner OP

Mar ’24

Hello, I have the same problem, and I resolve this issue by upgrading the TLS protocol version of your .Net service to 1.2.

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