[Q/A][Java SDK (Component)] In the event of a nacos failure and a dubbo provider failure, will the consumer disconnect the channel?

[TerryLam2010]

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Apache Dubbo Component

Java SDK (apache/dubbo)

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Assuming that the nacos and the dubbo provider are unreachable, will the consumer actively disconnect the channel? Or will the consumer skip selecting this faulty node during load balancing?

假设nacos和dubbo provider 网络不通，consumer会主动断开channel么？或者consumer会负载均衡的时候会跳过选择这个故障的节点么？

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[AlbumenJ]

the nacos and the dubbo provider are unreachable, will the consumer actively disconnect the channel

Yes, Nacos will notify the addresses without this broken provider

[TerryLam2010]

I might have described the issue incorrectly. It seems that the consumer cannot communicate with both Nacos and the provider, and Nacos is unable to send notifications. In this case, will the consumer disconnect the channel?

我可能描述错误了，是消费者与nacos、provider都不通了，nacos无法发出通知,这个情况下，consumer会不会断开channel.

[AlbumenJ]

Nope. If consumer cannot connect to provider, consumer will try to reconnect anyway and consumer won't invoker this provider before provider is ready

[TerryLam2010]

Okay, I understand now. When performing load balance, the isAvailable method of DubboInvoker is checked. This implementation will determine whether the channel is still connected and whether it has received a readonly status. So if there’s a network issue, it will skip the problematic Invoker. Thank you for your help!

好的，我清楚了。做loadbalance的时候判断了DubboInvoker的isAvailable，这个实现会判断channel是否仍在连接和是否接受到readonly。所以如果是网络问题，会跳开有问题的Invocker。谢谢你的帮助