添加配置到etcd中运行脚本出现错误 #3376

• I have searched the issues of this repository and believe that this is not a duplicate.

Ⅰ. Issue Description

使用sh命令运行etcd3-config.sh，向etcd3写入配置项

Ⅱ. Describe what happened

配置项中过长的项会不能写入成功
If there is an exception, please attach the exception trace:

 Complete initialization parameters,  total-count:67 ,  failure-count:5

Ⅲ. Describe what you expected to happen

Ⅳ. How to reproduce it (as minimally and precisely as possible)

Ⅴ. Anything else we need to know?

Ⅵ. Environment:

• JDK version :
• OS :
• Others: