Cherry-pick #14525 to 7.x: [Metricbeat] Check length of the slice instead of comparing with nil in cloudwatch #14539
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Cherry-pick of PR #14525 to 7.x branch. Original message:
When working on #14123, I realized when
tagsFilteris empty,tagsFilter != nilstill returns true. This PR is to fix this issue with using checking length of the slice instead.Empty slice and nil slice are different but both of them have zero length and capacity. For my own reference: https://yourbasic.org/golang/clear-slice/