I also run a test, if the network cannot be setup successfully, it is not concurrency.. I pasted part of the logs as below, each line of logs were print one by one. But I want to get all the connection status concurrency... 
10-09-2022 06:24:10 1.1.1.1 Can't connect to 1.1.1.1
10-09-2022 06:25:10 2.2.2.2 Can't connect to 2.2.2.2
10-09-2022 06:26:10 3.3.3.3 Can't connect to 3.3.3.3
10-09-2022 06:27:11 4.4.4.4 Can't connect to 4.4.4.4
...

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In reply to Re^6: Multiprocess - child process cannot be finished successfully by wonderG
in thread Multiprocess - child process cannot be finished successfully by wonderG

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