Workaround Sequelize's .save() possibly won't resolve bug

models/common.js

@@ -34,7 +34,8 @@ class Model {
     for (let key in obj) this.record.set(key, obj[key]);
 
     let isNew = this.record.isNewRecord;
-    await this.record.save();
+
+    await syzoj.utils.withTimeoutRetry(() => this.record.save());
     if (!isNew) return;
 
     await this.reload();

utility.js

@@ -294,5 +294,18 @@ module.exports = {
   async saveConfig() {
     let fs = require('fs-extra');
     fs.writeFileAsync(syzoj.configDir, JSON.stringify(syzoj.config, null, 2));
+  },
+  withTimeoutRetry(func) {
+    let attemptCount = 0;
+    return new Promise((resolve, reject) => {
+      function attempt() {
+        if (attemptCount++) console.log(`syzoj.utils.withTimeout(): attemptCount = ${attemptCount}`);
+        Promise.method(func)().timeout(5000)
+        .then(resolve)
+        .catch(Promise.TimeoutError, attempt)
+        .catch(reject);
+      }
+      attempt();
+    });
   }
 };