From 72a276e7edcf3a7abfd2b2eea509cfa895f49526 Mon Sep 17 00:00:00 2001
From: Brian Brazil <brian.brazil@robustperception.io>
Date: Thu, 25 May 2017 17:11:29 +0100
Subject: [PATCH] Pass through storage errors in limitAppender.

---
 retrieval/target.go | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/retrieval/target.go b/retrieval/target.go
index 708125d92..72e0f0b23 100644
--- a/retrieval/target.go
+++ b/retrieval/target.go
@@ -238,11 +238,11 @@ type limitAppender struct {
 
 func (app *limitAppender) Add(lset labels.Labels, t int64, v float64) (string, error) {
 	if app.i+1 > app.limit {
-		return "", errors.New("sample limit exceeded")
+		return "", fmt.Errorf("sample limit of %d exceeded", app.limit)
 	}
 	ref, err := app.Appender.Add(lset, t, v)
 	if err != nil {
-		return "", fmt.Errorf("sample limit of %d exceeded", app.limit)
+		return "", err
 	}
 	app.i++
 	return ref, nil
@@ -250,11 +250,11 @@ func (app *limitAppender) Add(lset labels.Labels, t int64, v float64) (string, e
 
 func (app *limitAppender) AddFast(ref string, t int64, v float64) error {
 	if app.i+1 > app.limit {
-		return errors.New("sample limit exceeded")
+		return fmt.Errorf("sample limit of %d exceeded", app.limit)
 	}
 
 	if err := app.Appender.AddFast(ref, t, v); err != nil {
-		return fmt.Errorf("sample limit of %d exceeded", app.limit)
+		return err
 	}
 	app.i++
 	return nil