This error is reported when the queue performs for more than 20 minutes

[huangli58]

Exception 'yii\redis\SocketException' with message 'Failed to read from socket.
Redis command was: ZREM cst-group-dataImportQueue2.reserved 99'

in /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-redis/src/Connection.php:778

Stack trace:
#0 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-redis/src/Connection.php(763): yii\redis\Connection->parseResponse(Array, '*3\r\n$4\r\nZREM\r\n$...')
#1 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-redis/src/Connection.php(746): yii\redis\Connection->sendCommandInternal('*3\r\n$4\r\nZREM\r\n$...', Array)
#2 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-redis/src/Connection.php(683): yii\redis\Connection->executeCommand('ZREM', Array)
#3 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-queue/src/drivers/redis/Queue.php(180): yii\redis\Connection->__call('zrem', Array)
#4 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-queue/src/drivers/redis/Queue.php(62): yii\queue\redis\Queue->delete('99')
#5 [internal function]: yii\queue\redis\Queue->yii\queue\redis{closure}(Object(Closure))
#6 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-queue/src/cli/Queue.php(117): call_user_func(Object(Closure), Object(Closure))
#7 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-queue/src/drivers/redis/Queue.php(68): yii\queue\cli\Queue->runWorker(Object(Closure))
#8 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2-queue/src/drivers/redis/Command.php(76): yii\queue\redis\Queue->run(true, 3)
#9 [internal function]: yii\queue\redis\Command->actionListen(3)
#10 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#11 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#12 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2/console/Controller.php(164): yii\base\Controller->runAction('listen', Array)
#13 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2/base/Module.php(528): yii\console\Controller->runAction('listen', Array)
#14 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2/console/Application.php(180): yii\base\Module->runAction('data-import-que...', Array)
#15 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2/console/Application.php(147): yii\console\Application->runAction('data-import-que...', Array)
#16 /mnt/hgfs/www/cst-group-new/vendor/yiisoft/yii2/base/Application.php(386): yii\console\Application->handleRequest(Object(yii\console\Request))
#17 /mnt/hgfs/www/cst-group-new/yii(23): yii\base\Application->run()
#18 {main}

[samdark]

There could be two reasons for it:

1. The socket itself "expires". In this case https://github.com/yiisoft/yii2-redis/blob/master/src/Connection.php#L342 may help.
2. You're out of memory because too many connections occupied at the same time.

[samdark]

Since there are no further details, we can't fix the problem.