Why Doesn't My Goroutine Timeout Case Execute When Using Channels?

Timeout Case Not Executing in GoroutineChannels

In a code snippet featuring goroutines and channels, a user encounters a puzzling situation where the timeout case in a select statement remains unexecuted.

The provided code establishes two goroutines, one sending values to a channel every 1.5 seconds, and another listening for values or triggering a timeout after 2 seconds. However, the timeout case never occurs.

Why is this behavior observed?

The key lies in the repeated creation of the timeout channel in each iteration of the select loop. Every time a value is received from the c1 channel, a new channel is generated by time.After(). This new channel will receive a value after another 2 seconds, but the previous timeout channel becomes obsolete. Hence, the timeout case can never be executed.

To rectify this issue and ensure that the timeout occurs as expected, create the timeout channel only once before the select loop. By doing so, the channel remains active throughout the program's execution, and the timeout case will be triggered after 2 seconds of inactivity on the c1 channel.

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