heroku - Heroku 上的 graphql-redis-subscriptions 无法始终如一地工作

Question

我们在节点 graphql 服务器上使用订阅。最近加了集群能力，用Redis做pubsub。在我的本地环境中，一切都很好。当我第一次上传到 heroku 并使用他们的 Redis 插件时，我看到它显示了一个突变，但下一次却没有。几次尝试后，它再次起作用(50% 起作用)。

import { RedisPubSub } from 'graphql-redis-subscriptions';
import Redis from 'ioredis';

let REDIS_URL = process.env.REDIS_URL || 'redis://127.0.0.1:6379';

const options = {
  retryStrategy: times => {
    // reconnect after
    return Math.min(times * 50, 2000);
  }
};

const pubsub = new RedisPubSub({
  publisher: new Redis(REDIS_URL, options),
  subscriber: new Redis(REDIS_URL, options)
});

这是我在日志中得到的错误

Aug 22 16:06:11 service-staging app[web] Error (node:76) UnhandledPromiseRejectionWarning: Error: Connection in subscriber mode, only subscriber commands may be used
Aug 22 16:06:11 service-staging app[web] info     at Redis.sendCommand (/app/node_modules/ioredis/built/redis/index.js:570:24)
Aug 22 16:06:11 service-staging app[web] info     at DatastoreShim.applySegment (/app/node_modules/newrelic/lib/shim/shim.js:1424:20)
Aug 22 16:06:11 service-staging app[web] info     at _applyRecorderSegment (/app/node_modules/newrelic/lib/shim/shim.js:1015:20)
Aug 22 16:06:11 service-staging app[web] info     at Redis._doRecord (/app/node_modules/newrelic/lib/shim/shim.js:994:17)
Aug 22 16:06:11 service-staging app[web] info     at Redis.wrapper [as sendCommand] (/app/node_modules/newrelic/lib/shim/shim.js:965:24)
Aug 22 16:06:11 service-staging app[web] info     at Redis.publish (/app/node_modules/ioredis/built/commander.js:124:21)
Aug 22 16:06:11 service-staging app[web] info     at RedisPubSub.<anonymous> (/app/node_modules/graphql-redis-subscriptions/src/redis-pubsub.ts:64:31)
Aug 22 16:06:11 service-staging app[web] info     at step (/app/node_modules/graphql-redis-subscriptions/dist/redis-pubsub.js:32:23)
Aug 22 16:06:11 service-staging app[web] info     at Object.next (/app/node_modules/graphql-redis-subscriptions/dist/redis-pubsub.js:13:53)
Aug 22 16:06:11 service-staging app[web] info     at /app/node_modules/graphql-redis-subscriptions/dist/redis-pubsub.js:7:71
Aug 22 16:06:11 service-staging app[web] info     at new Promise (<anonymous>)
Aug 22 16:06:11 service-staging app[web] info     at __awaiter (/app/node_modules/graphql-redis-subscriptions/dist/redis-pubsub.js:3:12)
Aug 22 16:06:11 service-staging app[web] info     at RedisPubSub.publish (/app/node_modules/graphql-redis-subscriptions/dist/redis-pubsub.js:76:16)
Aug 22 16:06:11 service-staging app[web] info     at publish (/app/src/resolvers/action.js:435:18)
Aug 22 16:06:11 service-staging app[web] info (node:76) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 9)

当我运行突变时，我应该看到它出现在监听订阅中。

另外，附带说明一下，如果我将实例数设置为 1 或 2，我总是会收到错误消息。 3个或更多我至少得到第一个突变和以下突变的一半。

Answer 1

在经历了很多个人的痛苦和痛苦之后，我让它运行起来了。我删除了 Heroku Redis 插件并将其替换为 Redis Cloud 插件。一切如预期!