From 40c4183196b8c6e1c44c27400965786b9f010c74 Mon Sep 17 00:00:00 2001
From: Oran Agra <oran@redislabs.com>
Date: Tue, 30 Jul 2019 16:32:58 +0300
Subject: [PATCH] Log message when modules prevent diskless-load

---
 src/replication.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/replication.c b/src/replication.c
index 14ae2f96c..614aaec83 100644
--- a/src/replication.c
+++ b/src/replication.c
@@ -1118,8 +1118,11 @@ static int useDisklessLoad() {
     int enabled = server.repl_diskless_load == REPL_DISKLESS_LOAD_SWAPDB ||
            (server.repl_diskless_load == REPL_DISKLESS_LOAD_WHEN_DB_EMPTY && dbTotalServerKeyCount()==0);
     /* Check all modules handle read errors, otherwise it's not safe to use diskless load. */
-    if (enabled && !moduleAllDatatypesHandleErrors())
+    if (enabled && !moduleAllDatatypesHandleErrors()) {
+        serverLog(LL_WARNING,
+            "Skipping diskless-load because there are modules that don't handle read errors.");
         enabled = 0;
+    }
     return enabled;
 }