记录 Redis 偶然错误 MISCONF Redis is configured to save RDB snapshots

百度搜索发现了这么个解决办法。可是没有缘由。执行下，redis 访问正常了

项目中用到redis作缓存服务器，近日出现这个异常：

redis.clients.jedis.exceptions.JedisDataException: 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.
redis.clients.jedis.Protocol.processError(Protocol.java:113)
redis.clients.jedis.Protocol.process(Protocol.java:138)
redis.clients.jedis.Protocol.read(Protocol.java:192)
redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:282)
redis.clients.jedis.Connection.getIntegerReply(Connection.java:207)
redis.clients.jedis.BinaryJedis.setnx(BinaryJedis.java:435)
com.radiadesign.catalina.session.RedisSessionManager.createSession(RedisSessionManager.java:274)
org.apache.catalina.connector.Request.doGetSession(Request.java:3014)
org.apache.catalina.connector.Request.getSession(Request.java:2378)
org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897)
org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:909)
javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:238)
javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:238)
javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:238)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

网上搜索，不少人都给出了解决方法，但没有详细说明问题的前因后果，暂且记下，待有空了研究。

解决方法：经过redis-cli链接到服务器后执行如下命令：

config set stop-writes-on-bgsave-error no

如此便可。

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