From 33bd8fb9810249a35d3bd9f5ddcb8a4f85a1c725 Mon Sep 17 00:00:00 2001
From: YaacovHazan <31382944+YaacovHazan@users.noreply.github.com>
Date: Mon, 25 Jul 2022 10:09:58 +0300
Subject: [PATCH] Add error log message when failing to open RDB file for
 reading (#11036)

When failing to open the rdb file, there was no specific error printed (unlike a
corrupt file), so it was not clear what failed and why.
---
 src/rdb.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/rdb.c b/src/rdb.c
index 79c156f18a..3cddccec80 100644
--- a/src/rdb.c
+++ b/src/rdb.c
@@ -3254,7 +3254,11 @@ int rdbLoad(char *filename, rdbSaveInfo *rsi, int rdbflags) {
     int retval;
     struct stat sb;
 
-    if ((fp = fopen(filename,"r")) == NULL) return C_ERR;
+    fp = fopen(filename, "r");
+    if (fp == NULL) {
+        serverLog(LL_WARNING,"Fatal error: can't open the RDB file %s for reading: %s", filename, strerror(errno));
+        return C_ERR;
+    }
 
     if (fstat(fileno(fp), &sb) == -1)
         sb.st_size = 0;