From 153cb0cbe3c3c5ed16ed72207463bd66e7d21b4d Mon Sep 17 00:00:00 2001
From: Krasi Georgiev <krasi-georgiev@users.noreply.github.com>
Date: Tue, 5 Sep 2017 13:55:14 +0300
Subject: [PATCH] scraping errors will show in the log when debug mode is
 enabled (#3135)

Signed-off-by: Krasi Georgiev <krasi.root@gmail.com>
---
 retrieval/scrape.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/retrieval/scrape.go b/retrieval/scrape.go
index 16ca5ecf7..044d62e0c 100644
--- a/retrieval/scrape.go
+++ b/retrieval/scrape.go
@@ -637,8 +637,11 @@ mainLoop:
 		var b []byte
 		if scrapeErr == nil {
 			b = buf.Bytes()
-		} else if errc != nil {
-			errc <- scrapeErr
+		} else {
+			sl.l.With("err", scrapeErr.Error()).Debug("scrape failed")
+			if errc != nil {
+				errc <- scrapeErr
+			}
 		}
 
 		// A failed scrape is the same as an empty scrape,