worker上都是这样的日志：
[mysql] 2022/12/23 10:07:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 10:17:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 10:27:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 10:37:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 10:47:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 10:57:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 11:07:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 11:17:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 11:27:18 packets.go:123: closing bad idle connection: EOF
[mysql] 2022/12/23 11:37:18 packets.go:123: closing bad idle connection: EOF