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Prevent dangling archiver goroutine (#19516) #19526

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merged 1 commit into from
Apr 27, 2022

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Backport #19516

Within doArchive there is a service goroutine that performs the
archiving function. This goroutine reports its error using a chan error called done. Prior to this PR this channel had 0 capacity
meaning that the goroutine would block until the done channel was
cleared - however there are a couple of ways in which this channel might
not be read.

The simplest solution is to add a single space of capacity to the
goroutine which will mean that the goroutine will always complete and
even if the done channel is not read it will be simply garbage
collected away.

(The PR also contains two other places when setting up the indexers
which do not leak but where the blocking of the sending goroutine is
also unnecessary and so we should just add a small amount of capacity
and let the sending goroutine complete as soon as it can.)

Signed-off-by: Andrew Thornton art27@cantab.net

Backport go-gitea#19516

Within doArchive there is a service goroutine that performs the
archiving function.  This goroutine reports its error using a `chan
error` called `done`. Prior to this PR this channel had 0 capacity
meaning that the goroutine would block until the `done` channel was
cleared - however there are a couple of ways in which this channel might
not be read.

The simplest solution is to add a single space of capacity to the
goroutine which will mean that the goroutine will always complete and
even if the `done` channel is not read it will be simply garbage
collected away.

(The PR also contains two other places when setting up the indexers
which do not leak but where the blocking of the sending goroutine is
also unnecessary and so we should just add a small amount of capacity
and let the sending goroutine complete as soon as it can.)

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: 6543 <6543@obermui.de>
@zeripath zeripath added this to the 1.16.7 milestone Apr 27, 2022
@GiteaBot GiteaBot added the lgtm/need 1 This PR needs approval from one additional maintainer to be merged. label Apr 27, 2022
@GiteaBot GiteaBot added lgtm/done This PR has enough approvals to get merged. There are no important open reservations anymore. and removed lgtm/need 1 This PR needs approval from one additional maintainer to be merged. labels Apr 27, 2022
@lunny lunny merged commit 39a0db6 into go-gitea:release/v1.16 Apr 27, 2022
Codeberg-org pushed a commit to Codeberg-org/gitea that referenced this pull request Apr 28, 2022
Backport go-gitea#19516

Within doArchive there is a service goroutine that performs the
archiving function.  This goroutine reports its error using a `chan
error` called `done`. Prior to this PR this channel had 0 capacity
meaning that the goroutine would block until the `done` channel was
cleared - however there are a couple of ways in which this channel might
not be read.

The simplest solution is to add a single space of capacity to the
goroutine which will mean that the goroutine will always complete and
even if the `done` channel is not read it will be simply garbage
collected away.

(The PR also contains two other places when setting up the indexers
which do not leak but where the blocking of the sending goroutine is
also unnecessary and so we should just add a small amount of capacity
and let the sending goroutine complete as soon as it can.)

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: 6543 <6543@obermui.de>

Co-authored-by: 6543 <6543@obermui.de>
@zeripath zeripath deleted the backport-19516-v1.16 branch June 1, 2022 13:03
@go-gitea go-gitea locked and limited conversation to collaborators May 3, 2023
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4 participants