Skipped task if no candidate nodes.

[k82cn]

fix #838

Signed-off-by: Klaus Ma klaus1982.cn@gmail.com

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[hzxuzhonghu]

The real cause is from node = util.SelectBestNode(nodeScores), where nodeScores is empty.

[k82cn]

The real cause is from node = util.SelectBestNode(nodeScores), where nodeScores is empty.

The nodeScores is built from candidateNodes.

[hzxuzhonghu]

@zishen added a customized plugin, which functions on PrioritizeNodes

[k82cn]

@zishen added a customized plugin, which functions on PrioritizeNodes

xref #838 (comment)

[hzxuzhonghu]

Please note: It is possible when candidateNodes is not empty but nodeScores is.

[k82cn]

Please note: It is possible when candidateNodes is not empty but nodeScores is.

when? PrioritizeNodes should only sort candidateNodes.

[hzxuzhonghu]

@zishen Please help explain your use case. I remember that batchFn fails, and returns

	batchNodeScore, err := batchFn(task, nodes)
	if err != nil {
		klog.Errorf("Error in Calculating batch Priority for the node, err %v", err)
		return nodeScores
	}