How to fix 'Redis server error: socket error on read socket' error in mediawiki

Question

I am receiving error as

Redis server error: socket error on read socket Error received as 'JobQueueError from line xxx of JobQueueRedis.php: Redis server error: socket error on read socket'

I tried by changing persistent connection option to true.

$wgObjectCaches['redis'] = [
  'class'       => 'RedisBagOStuff',
  'servers'     => [ $redisserver ],
  'persistent'  => true
];

Answer 1

In our case the following errors would occur because our AWS ElasticeCache Redis Cluster was using 100% of available memory :

"RedisException","message":"socket error on read socket","code":0 "RedisClusterException","message":"Error processing response from Redis node!"

Increasing the number of nodes and or allowing more memory on the instance seemed to solve the problem. But it seems our cached values take a lot of memory and need to expire faster.