Operation failed because the connection was cleanly shut down with a close_notify alert

Question

Problem :

I have very simple program HelloWorld is running on iOS. The same program has been running fine for a long time. But recently I noticed that I get the below listed BoringSSL error when my program runs on my ipad which is connected to Xcode 9 on my Macbook. I do not see the error when try I to run the program on simulator. My iOS version is 11.2 and Xcode version is 9.2.

Please note my code has no reference to BoringSSL. Still, it uses the NSMutableURLRequest to make https call to a server. The call works correctly and everything is working fine except the BoringSSL messages.

How can I debug why the message comes up? Also what does the message mean and how can I avoid it?

2019-12-03 15:41:13.486047-0500 HellowWorld[466:85961] [BoringSSL] Function boringssl_session_errorlog: line 2871 [boringssl_session_read] SSL_ERROR_ZERO_RETURN(6): operation failed because the connection was cleanly shut down with a close_notify alert

2019-12-03 15:41:13.486363-0500 HellowWorld[466:85961] [BoringSSL] Function boringssl_session_errorlog: line 2871 [boringssl_session_read] SSL_ERROR_ZERO_RETURN(6): operation failed because the connection was cleanly shut down with a close_notify alert

Answer 1

I also faced the similar issue in past I was sending the GET request with a JSON request body using the Alamofire. I just changed it to a GET request that contains the parameters as query parameters in the URL instead (e.g GET https://your-api.com/v1/request?param=value). Then it worked flawlessly for me.