colflow: fix recent misuse of two slices in the flow setup #56597
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We've recently added the reusing of metadataSourcesQueue and toClose slices in order to reduce some allocations. However, the components that are using those slices don't make a deep copy, and as a result, we introduced a bug in which we were breaking the current contract. This commit fixes the issue by going back to the old method (with slight difference in that we currently delay any allocations unlike previously when we allocated a slice with capacity of 1). Release note: None (no release with this bug)
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This change is |
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I noticed this while reviving #55909. There still is lurking some other issue due to reusing of the materializers which I don't quite understand yet, but I believe this PR fixes a true problem still. |
asubiotto
approved these changes
Nov 12, 2020
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The other option is to change components that drain to copy the slice that is passed in to them to make it really lazy, but this also
Reviewable status:
complete! 1 of 0 LGTMs obtained (waiting on @asubiotto)
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I like the current approach more since it centralizes where the decision to copy or not is made. TFTR! bors r+ |
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This PR was included in a batch that was canceled, it will be automatically retried |
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Build succeeded: |
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We've recently added the reusing of metadataSourcesQueue and toClose
slices in order to reduce some allocations. However, the components that
are using those slices don't make a deep copy, and as a result, we
introduced a bug in which we were breaking the current contract. This
commit fixes the issue by going back to the old method (with slight
difference in that we currently delay any allocations unlike previously
when we allocated a slice with capacity of 1).
Release note: None (no release with this bug)