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

报错日志：

2020-10-22 17:14:57,140 ERROR [com.asion.business.web.advice.ExceptionAdvice:37] - Error in execution; nested exception is io.lettuce.core.RedisCommandExecutionException: MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error.
org.springframework.data.redis.RedisSystemException: Error in execution; nested exception is io.lettuce.core.RedisCommandExecutionException: MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error.

caused by :

Caused by: io.lettuce.core.RedisCommandExecutionException: MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error.
        at io.lettuce.core.protocol.AsyncCommand.completeResult(AsyncCommand.java:118)
        at io.lettuce.core.protocol.AsyncCommand.complete(AsyncCommand.java:109)
        at io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:598)
        at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:556)
        at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:508)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:647)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:582)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:499)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:461)
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        ... 1 common frames omitted

 

日志内容：Redis被配置为保存数据库快照，但它目前不能持久化到硬盘。用来修改集合数据的命令不能用。请查看Redis日志的详细错误信息。

redis快照被强制关闭了导致不能持久化。

首先查看redis服务器上的磁盘是否满了和其对磁盘的访问权限是否不足。

此次报错为磁盘空间不足。

 

网上搜索到的解决办法多为 将redis的 stop-writes-on-bgsave-error值设置为no（未尝试）

命令行修改方式:

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

 重启redis-server

 

redis.conf文件中修改方式：

将stop-writes-on-bgsave-error 配置项修改为“no”。

 

Redis Bgsave 命令用于在后台异步保存当前数据库的数据到磁盘。

BGSAVE 命令执行之后立即返回 OK ，然后 Redis fork 出一个新子进程，原来的 Redis 进程(父进程)继续处理客户端请求，而子进程则负责将数据保存到磁盘，然后退出。

SAVE 和 BGSAVE 两个命令都会调用 rdbSave 函数，但它们调用的方式各有不同：

• SAVE 直接调用 rdbSave ，阻塞 Redis 主进程，直到保存完成为止。在主进程阻塞期间，服务器不能处理客户端的任何请求。
• BGSAVE 则 fork 出一个子进程，子进程负责调用 rdbSave ，并在保存完成之后向主进程发送信号，通知保存已完成。 Redis 服务器在BGSAVE 执行期间仍然可以继续处理客户端的请求。

 

 即在RDB持久化数据到磁盘出现错误时，不停止redis的写入操作。