Error: Socket closed unexpectedly & ECONNREFUSED
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Description
Hi! I'm working with a Redis Cluster with four masters and four slaves distributed in two different hosts, with the following configuration:
Host 1:
Master in port 6000 (nodes 0 to 4095);
Master in port 6001 (nodes 8192 to 12287);
Slave in port 6002 (master in host 2, port 6001);
Slave in port 6003 (master in host 2, port 6000);
Host 2:
Master in port 6000 (nodes 4096 to 8191);
Master in port 6001 (nodes 12288 to 16383);
Slave in port 6002 (master in host 1, port 6001);
Slave in port 6003 (master in host 1, port 6000);
All is set that in case a master goes down, the corresponding slave takes its place. In Redis this works fine, but in node-redis once a master goes down it keeps trying to reconnect to the closed socket and ignores the new master, wich keeps printing in console the same error: connect ECONNRFUSED XXX.XXX.XXX.XXX:6000
I have the following configuration for my cluster in node-redis:
try {
(async()=>{
let path = [];
for(let i in self.config.get('redis').cluster){
let item = self.config.get('redis').cluster[i];
path.push({
'url': 'redis://'+ item.host +':' + item.port
});
}
self.redis = Redis.createCluster({
rootNodes: path,
defaults: {
socket: {
reconnectStrategy: function (times) {
var delay = Math.min(100 + times * 2, 2000);
return delay;
}
}
},
maxCommandRedirections: 16,
});
self.redis.on('error', function(error) {
self.logger.error("Error: " + error);
});
await self.redis.connect();
})();
} catch (ex) {
self.logger.error("Couldn't connect to Redis Cluster ", ex);
throw ex;
}
Is there anything I need to change in my configuration to stop the error from appearing and connect to the new master?
Thanks in advance for the help.
Environment:
- Node.js Version: v16.14.0
- Redis Server Version: 6.2.6
- Node Redis Version: 4.1.0
- Platform: Alpine Linux v3.15
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the createCluster configuration and its socket reconnectStrategy, then reproduce the Redis 6.2.6 failover using the four-master, four-slave topology and Node Redis 4.1.0. Trace how the client handles the closed socket and promoted master; done means it follows the new master without repeatedly reporting ECONNREFUSED.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- node.js, redis, typescript
- Domain
- databases, distributed-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100