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MySQL Error number: MY-011184; Symbol: ER_SEMISYNC_NOT_SUPPORTED_BY_MASTER; SQLSTATE: HY000 报错 故障修复

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MySQL Error number: MY-011184; Symbol: ER_SEMISYNC_NOT_SUPPORTED_BY_MASTER; SQLSTATE: HY000  报错 故障修复

文档解释

Error number: MY-011184; Symbol: ER_SEMISYNC_NOT_SUPPORTED_BY_MASTER; SQLSTATE: HY000

Message: Master server does not support semi-sync, fallback to asynchronous replication

错误说明

ER_SEMISYNC_NOT_SUPPORTED_BY_MASTER 错误表明,MySQL 服务器关闭了半同步复制的支持,这是一个MySQL系统函数。有时,当MySQL主机运行特定版本或具有特定的配置时,客户端可能会收到此错误。此外,如果用户正在访问其他MySQL服务器,而这些服务器尚未支持半同步复制,则可能会出现该错误。

常见案例

此错误的出现主要是由于半同步复制被MySQL禁用所致。另一个可能的情况是,您可能正在试图使用服务器上不支持半同步复制的MySQL实例来复制数据。此外,由于半同步复制不能在每个版本上使用,这也可能是一个原因。

解决方法

首先,尝试在服务器上检查是否半同步复制已禁用,然后尝试启用它。如果使用的是MySQL 5.7,则可以使用以下命令:

SET GLOBAL rpl_semi_sync_slave_enabled = 1;

如果可能,请确保使用服务器支持半同步复制的版本。您可以使用以下命令检查当前MySQL服务器使用的MySQL版本:

SELECT Version ();

此外,您可以尝试将MySQL服务器从5.6升级到5.7,因为5.6不支持半同步复制。

另一种可能的解决办法是禁用半同步复制。这可以通过使用以下命令来完成:

SET GLOBAL rpl_semi_sync_slave_enabled = 0;

尽管禁用半同步复制可能不会使您的MySQL实例更安全,但它可以解决上述问题。

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MySQL Error number: MY-011184; Symbol: ER_SEMISYNC_NOT_SUPPORTED_BY_MASTER; SQLSTATE: HY000 报错 故障修复

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