fix: Unhandled connection in closed state

mylogger.js

@@ -57,12 +57,9 @@ module.exports = class MyLogger {
   async init() {
     const {conf} = this;
     this.debug('MyLogger', 'Initializing.');
-    this.onErrorListener = err => this.onError(err);
 
     // DB connection
-
     const db = this.db = await mysql.createConnection(conf.dstDb);
-    db.on('error', this.onErrorListener);
 
     await this.modelLoader.loadSchema();
     await this.showDb.loadSchema();
@@ -135,8 +132,6 @@ module.exports = class MyLogger {
     this.running = false;
     this.debug('MyLogger', 'Ending.');
 
-    this.db.off('error', this.onErrorListener);
-
     clearInterval(this.flushInterval);
     clearInterval(this.pingInterval);
     clearInterval(this.flushTimeout);
@@ -206,7 +201,6 @@ module.exports = class MyLogger {
       zongji.once('error',  onError);
       zongji.start(zongjiOpts);
     });
-    zongji.on('error', this.onErrorListener);
     this.zongji = zongji;
     this.debug('Zongji', 'Started.');
   }
@@ -220,7 +214,6 @@ module.exports = class MyLogger {
     this.zongji = null;
 
     zongji.off('binlog', this.onBinlogListener);
-    zongji.off('error', this.onErrorListener);
 
     // FIXME: Cannot call Zongji.stop(), it doesn't wait to end connection
     zongji.connection.destroy(() => {
@@ -250,7 +243,7 @@ module.exports = class MyLogger {
     }
   }
 
-  async onError(err) {
+  async handleError(err) {
     if (!this.isOk) return;
     this.isOk = false;
     console.log(`Error: ${err.code}: ${err.message}`);
@@ -259,19 +252,19 @@ module.exports = class MyLogger {
       await this.end(true);
     } catch(e) {}
 
-    switch (err.code) {
-      case 'PROTOCOL_CONNECTION_LOST':
-      case 'ECONNRESET':
-      console.log('Trying to restart process.');
+    // FIXME: Error of mysql2/promise
+    if (err.message === `Can't add new command when connection is in closed state`)
       await this.tryRestart();
-      break;
-    default:
-      process.exit();
-    }
-  }
-
-  handleError(err) {
-    console.error(err);
+    else
+      switch (err.code) {
+        case 'PROTOCOL_CONNECTION_LOST':
+        case 'ECONNRESET':
+        console.log('Trying to restart process.');
+        await this.tryRestart();
+        break;
+      default:
+        process.exit();
+      }
   }
 
   async onBinlog(evt) {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mylogger",
-  "version": "1.1.4",
+  "version": "1.1.5",
   "author": "Verdnatura Levante SL",
   "description": "MySQL and MariaDB logger using binary log",
   "license": "GPL-3.0",