dubbo版本升级后，weight值修改问题

consumer1: 版本alibaba dubbo 2.6.2
consumer2: 版本apache dubbo 2.7.15

provider apache dubbo 2.7.15

loabbalance为：roundrobin

两个节点，两个节点权重都是默认的100

操作:修改zk中dubbo的providers中的某一个url中weight的值为0

现象:weight值被设置成0的节点还是可以收到consumer2的dubbo请求

请问这个是啥原因

No source file or test is named in the report. First reproduce the two-consumer, two-provider setup with Alibaba Dubbo 2.6.2, Apache Dubbo 2.7.15, roundrobin load balancing, and a provider weight changed to 0 in ZooKeeper; done means explaining whether that provider should receive requests and documenting or fixing the verified behavior.

Written by the indexing model from the issue text.