java.net.UnknownHostException：无法解析 'inventory-microservice'。超过每个解析的最大查询数 3

Question

我正在尝试运行以下 vertx 教程，但卡在这个异常上。

http://www.sczyh30.com/vertx-blueprint-microservice/index.html

我已经尝试运行只是单个服务或整个项目异常都一样。

我缺少任何 docker 设置吗？

            ov 03, 2016 10:35:55 PM io.vertx.core.impl.launcher.commands.VertxIsolatedDeployer
            cache-infrastructure_1    | INFO: Succeeded in deploying verticle
            inventory-microservice_1  | java.net.UnknownHostException: failed to resolve 'inventory-microservice'. Exceeded max queries per resolve 3 
            inventory-microservice_1  |     at io.netty.resolver.dns.DnsNameResolverContext.finishResolve(DnsNameResolverContext.java:476)
            inventory-microservice_1  |     at io.netty.resolver.dns.DnsNameResolverContext.tryToFinishResolve(DnsNameResolverContext.java:398)
            inventory-microservice_1  |     at io.netty.resolver.dns.DnsNameResolverContext.operationComplete(DnsNameResolverContext.java:193)
            inventory-microservice_1  |     at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:514)
            inventory-microservice_1  |     at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:488)
            inventory-microservice_1  |     at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:427)
            inventory-microservice_1  |     at io.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:102)
            inventory-microservice_1  |     at io.netty.resolver.dns.DnsQueryContext.setSuccess(DnsQueryContext.java:195)
            inventory-microservice_1  |     at io.netty.resolver.dns.DnsQueryContext.finish(DnsQueryContext.java:178)
            inventory-microservice_1  |     at io.netty.resolver.dns.DnsNameResolver$DnsResponseHandler.channelRead(DnsNameResolver.java:694)
            inventory-microservice_1  |     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372)
            inventory-microservice_1  |     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358)
            inventory-microservice_1  |     at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:350)
            inventory-microservice_1  |     at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
            inventory-microservice_1  |     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372)
            inventory-microservice_1  |     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358)
            inventory-microservice_1  |     at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:350)
            inventory-microservice_1  |     at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
            inventory-microservice_1  |     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372)
            inventory-microservice_1  |     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358)
            inventory-microservice_1  |     at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
            inventory-microservice_1  |     at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:93)
            inventory-microservice_1  |     at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:610)
            inventory-microservice_1  |     at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:551)
            inventory-microservice_1  |     at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:465)
            inventory-microservice_1  |     at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:437)
            inventory-microservice_1  |     at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
            inventory-microservice_1  |     at java.lang.Thread.run(Thread.java:745)

Answer 1

经过大量调试，我终于发现最新版本的 vertx 在解析主机时存在问题。所以通过这个选项我们可以禁用默认情况下打开的 disableDnsResolver。对我来说效果很好

CMD ["java -Dvertx.disableDnsResolver=true -jar account-microservice-fat.jar -cluster -conf docker.json"]

如果尝试运行上面的例子你需要在每个微服务

的DockerFile中添加-Dvertx.disableDnsResolver=true

java.net.UnknownHostException：无法解析 'inventory-microservice'。超过每个解析的最大查询数 3

java.net.UnknownHostException: failed to resolve 'inventory-microservice'. Exceeded max queries per resolve 3

vert.x

docker-compose