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                                            Ranger

kafka is down , lua kafka product send err, nginx must be reload manually

add refresh_interval to flush meta cache would be help try: local bp = producer:new(broker_list, { producer_type = "async", **refresh_interval=30000** })

We need dubbo-proxy can handle with form post or queryString

可以试试，[grpc-dubbo-proxy](https://github.com/Jijun/grpc-dubbo-proxy) 直接封装为grpc服务，调用路径可以做到 nginx-> grpc-dubbo-proxy-> dubbo。

cjson encode table encodes `/`

https://github.com/mpx/lua-cjson/pull/57

配置了JVM堆栈参数就报Java heap space

我在用Java生成xdb的时候，遇到相同的问题，发现是loadSegments全部读入内存，导致crash