XA is enabled if binary log is enabled this is why this issue is trigered by enabled binary log. if binary log is disabled, so is XA and old group commit code works just fine.

• 如果启用了二进制日志，则XA也启用了，这就是为什么启用二进制日之后会触发这个问题。如果禁用二进制日志，则XA和旧的分组提交代码就都没问题了。