MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk.

MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error

redis报这个错   我这边用的docker     发现了两种要做的方案

1.  修改内核 tcp  最大链接（(1)请确保你的docker启动给了privileger权限不然改不了内核参数，(2)确保/usr/sbin/init这种启动方式）

eg： 启动docker  参考我的指令 

docker run -itd --privileged --name nn_php_nginx -v /home/vagrant/code:/code -v /etc/localtime:/etc/localtime:ro -p 80:80 nn_php_nginx:1.8 /usr/sbin/init

开始修改tcp 监听队列最大长度内核参数  参考 --（https://blog.csdn.net/ghostyusheng/article/details/80434396）

修改somaxconn

在/etc/sysctl.conf中添加如下

net.core.somaxconn = 2048

然后在终端中执行

sysctl -p

2.修改redis 快照问题 

命令行修改：

127.0.0.1:6379> config set stop-writes-on-bgsave-error no

文件修改：

打开redis-server配置的redis.conf文件，找到stop-writes-on-bgsave-error，把yes设置为no。