Heapster should handle duplicated stats from kubelet gracefully

[fgrzadkowski]

Ref kubernetes/kubernetes#47853

[piosz]

@loburm could you please take a look? Thanks!

[DirectXMan12]

we need to make sure we log this if it happens, among other things. In the past, we've had too many spots in the collection code which silently ignores errors or missing data.

[DirectXMan12]

@piosz: it looks @loburm isn't yet on the list of people that I can assign to

[piosz]

@DirectXMan12 I asked Filip to add him to heapster-reviewers team.

[fgrzadkowski]

@DirectXMan12 @piosz Fixed.

[piosz]

@fgrzadkowski thx

[loburm]

With #1708 merged, I'm closing this issue.

[piosz]

Unfortunately this is not fixed yet. We've seen duplicated containers with non-zero resource usage. Will send a fix soon.

[piosz]

#1790 fixed the problem in 1.4. Decreasing the priority - we need to fix this in HEAD as well.