Improve Redis error handling

server/services/websockets.ts

@@ -85,8 +85,7 @@ export default function init(
 
   io.of("/").adapter.on("error", (err: Error) => {
     if (err.name === "MaxRetriesPerRequestError") {
-      Logger.error("Redis maximum retries exceeded in socketio adapter", err);
-      throw err;
+      Logger.fatal("Redis maximum retries exceeded in socketio adapter", err);
     } else {
       Logger.error("Redis error in socketio adapter", err);
     }

server/storage/redis.ts

@@ -11,12 +11,17 @@ type RedisAdapterOptions = RedisOptions & {
 const defaultOptions: RedisOptions = {
   maxRetriesPerRequest: 20,
   enableReadyCheck: false,
+  showFriendlyErrorStack: env.ENVIRONMENT === "development",
 
   retryStrategy(times: number) {
     Logger.warn(`Retrying redis connection: attempt ${times}`);
     return Math.min(times * 100, 3000);
   },
 
+  reconnectOnError(err) {
+    return err.message.includes("READONLY");
+  },
+
   // support Heroku Redis, see:
   // https://devcenter.heroku.com/articles/heroku-redis#ioredis-module
   tls: (env.REDIS_URL || "").startsWith("rediss://")