Error with NSURLSessionDataTask in iOS 10

I am having an issue with NSURLSessionDataTask , while trying to upload a JSON object , I am getting the following message in console .

[] __tcp_connection_write_eof_block_invoke Write close callback received 
[error: [89] Operation canceled]

How to solve this issue ?

Solution

May be it is related to OS_ACTIVITY_MODE settings for Schemes.

disable OS_ACTIVITY_MODE mode by following steps and check:

--- Go in Product ---> Scheme ---> Edit Scheme

--- in Run Section on the left, select Argument Tab and in Environment Variable Change value as below:

Name: OS_ACTIVITY_MODE 
Value: disable