From a005bc2100480320b33a650d1e9b829c610f4d6f Mon Sep 17 00:00:00 2001
From: Anton Kolesnikov <anton.e.kolesnikov@gmail.com>
Date: Fri, 6 Aug 2021 19:07:01 +0200
Subject: [PATCH] Fix CPU check

On Linux, if there are no file descriptors available, the call
returns an empty slice, which results in server crash.
---
 pkg/util/debug/cpu.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkg/util/debug/cpu.go b/pkg/util/debug/cpu.go
index 5f7cf1bd66..4e3d88fc1b 100644
--- a/pkg/util/debug/cpu.go
+++ b/pkg/util/debug/cpu.go
@@ -8,7 +8,7 @@ import (
 
 func CPUUsage(interval time.Duration) map[string]interface{} {
 	cpuVal, err := cpu.Percent(interval, false)
-	if err != nil {
+	if err != nil || len(cpuVal) == 0 {
 		return map[string]interface{}{}
 	}