Timeout waiting for a client

[punkpeye]

Description

getting bursts of errors like:

capturing exception: could not set cache in redis (0cd2df411f72477996ab75843eba9b2f) {
  error: {
    message: 'Timeout waiting for a client',
    stack: 'Timeout._onTimeout /srv/node_modules/.pnpm/ redis+client@5.5.6/node_modules/@redis/client/lib/client/pool.ts:406:22\n' +
      '- listOnTimeout node:internal/timers:608:17\n' +
      '- process.processTimers node:internal/timers:543:7'
  },
  extra: { KEY: 'cache:number:...' }
}

all parameters on the Redis server side of things show healthy server, i.e. low CPU/memory usage/no abnormal logs.

Node.js Version

No response

Redis Server Version

No response

Node Redis Version

No response

Platform

No response

Logs

[punkpeye]

I wonder if this is related to my pooling configuration?

import { createClientPool } from 'redis';

createClientPool(
  {
    RESP: 3,
    url: config.REDIS_DSN,
  },
  {
    acquireTimeout: 10_000,
    cleanupDelay: 10_000,
    maximum: 50,
    minimum: 5,
  },
);

Could it be that we are exceeding 50 clients and timing out waiting for a new one?

[punkpeye]

If that's the case, logs do not make that clear.

[nkaradzhov]

@punkpeye can you please provide more complete example, so I can more easily reproduce this