向rpc服务发送http请求，会因为json_decode 解析错误，导致work进程die掉

[zuobee]

Q	A
Bug report?	yes/no
Feature request?	yes/no
Swoft version	x.y.z (by php bin/swoft -V)
Swoole version	x.y.z (by php --ri swoole)
PHP version	x.y.z (by php -v)
Runtime environment	Win10/Mac/CentOS 7/Ubuntu/Docker etc.

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