metrics: fix the panic for reading empty cpu stats (#21864)

b9ff57c5 · gary rong · GitHub · 23524f89 · b9ff57c5
Unverified Commit b9ff57c5 authored 4 years ago by gary rong Committed by GitHub 4 years ago
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cpu_enabled.go metrics/cpu_enabled.go +4 -0

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--- a/metrics/cpu_enabled.go
+++ b/metrics/cpu_enabled.go
@@ -31,6 +31,10 @@ func ReadCPUStats(stats *CPUStats) {
 		log.Error("Could not read cpu stats", "err", err)
 		return
 	}
+	if len(timeStats) == 0 {
+		log.Error("Empty cpu stats")
+		return
+	}
 	// requesting all cpu times will always return an array with only one time stats entry
 	timeStat := timeStats[0]
 	stats.GlobalTime = int64((timeStat.User + timeStat.Nice + timeStat.System) * cpu.ClocksPerSec)