UnknownHostException: org.apache.dubbo.samples.basic.api.demoservice #30
Description
这问题，偶尔会出现，有时候卸载重新部署又没有出现，怎么排查这个原因？
1、部署
./demo/metaprotocol-dubbo/uninstall.sh
kubectl create ns meta-dubbo
kubectl label namespace meta-dubbo istio-injection=enabled --overwrite
kubectl apply -f demo/k8s/aeraki-bootstrap-config.yaml -n meta-dubbo
kubectl apply -f demo/k8s/nacos -n meta-dubbo
kubectl apply -f demo/traffic-rules/destinationrule.yaml -n meta-dubbo
2、等待pod启动
[root@master dubbo2istio]# kubectl get pod -n meta-dubbo
NAME READY STATUS RESTARTS AGE
dubbo-sample-consumer-5cf9f6f878-xxp8j 2/2 Running 0 22m
dubbo-sample-provider-v1-566fbbb9fb-zd5hj 2/2 Running 0 22m
dubbo-sample-provider-v2-68468d8bc9-2lnv4 2/2 Running 0 22m
dubbo2istio-686d5554cc-5mnsg 1/1 Running 0 22m
nacos-5cfbc49d9d-6kmd6 1/1 Running 0 22m
3、查看日志
Caused by: org.apache.dubbo.remoting.RemotingException: client(url: dubbo://org.apache.dubbo.samples.basic.api.demoservice:20880/org.apache.dubbo.samples.basic.api.DemoService?application=dubbo-sample-consumer&check=true&codec=dubbo&heartbeat=60000&init=false&interface=org.apache.dubbo.samples.basic.api.DemoService&pid=7®ister.ip=10.244.0.97&remote.application=&revision=1.0-SNAPSHOT&side=consumer&sticky=false&timeout=3000) failed to connect to server org.apache.dubbo.samples.basic.api.demoservice:20880, error message is:org.apache.dubbo.samples.basic.api.demoservice
at org.apache.dubbo.remoting.transport.netty4.NettyClient.doConnect(NettyClient.java:169)
at org.apache.dubbo.remoting.transport.AbstractClient.connect(AbstractClient.java:198)
at org.apache.dubbo.remoting.transport.AbstractClient.(AbstractClient.java:73)
at org.apache.dubbo.remoting.transport.netty4.NettyClient.(NettyClient.java:82)
at org.apache.dubbo.remoting.transport.netty4.NettyTransporter.connect(NettyTransporter.java:40)
at org.apache.dubbo.remoting.Transporter$Adaptive.connect(Transporter$Adaptive.java)
at org.apache.dubbo.remoting.Transporters.connect(Transporters.java:75)
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchanger.connect(HeaderExchanger.java:39)
at org.apache.dubbo.remoting.exchange.Exchangers.connect(Exchangers.java:109)
at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.initClient(DubboProtocol.java:610)
... 22 more
Caused by: java.net.UnknownHostException: org.apache.dubbo.samples.basic.api.demoservice
at java.net.InetAddress.getAllByName0(InetAddress.java:1287)
at java.net.InetAddress.getAllByName(InetAddress.java:1199)
at java.net.InetAddress.getAllByName(InetAddress.java:1127)
at java.net.InetAddress.getByName(InetAddress.java:1077)
at io.netty.util.internal.SocketUtils$8.run(SocketUtils.java:156)
at io.netty.util.internal.SocketUtils$8.run(SocketUtils.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at io.netty.util.internal.SocketUtils.addressByName(SocketUtils.java:153)
at io.netty.resolver.DefaultNameResolver.doResolve(DefaultNameResolver.java:41)
at io.netty.resolver.SimpleNameResolver.resolve(SimpleNameResolver.java:61)