From a3bd7fa779d0b37c04b0a6553ed02f59a2d00b63 Mon Sep 17 00:00:00 2001
From: Andris Reinman <andris@kreata.ee>
Date: Tue, 26 Apr 2016 15:46:29 +0300
Subject: [PATCH] Show meaningful MySQL errors when startup fails

---
 index.js       | 2 +-
 lib/dbcheck.js | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index d3e1e036..565119fa 100644
--- a/index.js
+++ b/index.js
@@ -34,7 +34,7 @@ let server = http.createServer(app);
 // Check if database needs upgrading before starting the server
 dbcheck(err => {
     if (err) {
-        log.error('DB', err);
+        log.error('DB', err.message || err);
         return process.exit(1);
     }
     /**
diff --git a/lib/dbcheck.js b/lib/dbcheck.js
index 45d2be66..30b13b0c 100644
--- a/lib/dbcheck.js
+++ b/lib/dbcheck.js
@@ -21,6 +21,12 @@ let db = mysql.createPool(mysqlConfig);
 function listTables(callback) {
     db.getConnection((err, connection) => {
         if (err) {
+            if(err.code === 'ER_ACCESS_DENIED_ERROR'){
+                err = new Error('Could not access the database. Check MySQL config and authentication credentials');
+            }
+            if(err.code === 'ECONNREFUSED' || err.code === 'PROTOCOL_SEQUENCE_TIMEOUT'){
+                err = new Error('Could not connect to the database. Check MySQL host and port configuration');
+            }
             return callback(err);
         }
         let query = 'SHOW TABLES';