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fix(events): avoid potential hang when starting event listener #5159

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merged 1 commit into from
Dec 9, 2020

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iand
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@iand iand commented Dec 9, 2020

It was possible for NewEvents to never return, blocked on waiting for a WaitGroup to be done.
The call to Done was in a goroutine that could exit before reaching the Done call.

Replace the WaitGroup with a channel that is closed to signal that initialisation is complete.
Also, while we are waiting on the channel, wait on the context so we can exit clealy if the
context is canceled.

It was possible for NewEvents to never return, blocked on waiting for a WaitGroup to be done.
The call to Done was in a goroutine that could exit before reaching the Done call.

Replace the WaitGroup with a channel that is closed to signal that initialisation is complete.
Also, while we are waiting on the channel, wait on the context so we can exit clealy if the
context is canceled.
@iand iand changed the title fix: avoid potential hang when starting event listener fix(events): avoid potential hang when starting event listener Dec 9, 2020
@magik6k magik6k merged commit e1be89b into filecoin-project:master Dec 9, 2020
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2 participants