<p>I have upgraded the version of quarkus to 2.8.0.CR1</p>
<p>My quarkus apps are using a mix of camel, mutiny, resteasy, mongo, pubsub and it seems to have been reproduced on all.</p>
<p>It seems like there was an upgrade to vertx in the mean time that introduced an alternative dns resolver.</p>
<p>The issue however is that when I try to now deploy my application through my kubernetes cluster I am getting dns resolution issues.</p>
<p>If i try to launch it as is, I get this failure when trying to connect to my spring-cloud-config server (on init). The domain would not resolve since it' susing the google public dns.</p>
<pre><code>May 06, 2022 7:42:53 AM io.netty.resolver.dns.DefaultDnsServerAddressStreamProvider
WARN: Default DNS servers: [/8.8.8.8:53, /8.8.4.4:53] (Google Public DNS as a fallback)
May 06, 2022 7:42:55 AM io.quarkus.runtime.ApplicationLifecycleManager run
ERROR: Failed to start application (with profile cloud)
java.net.UnknownHostException: Failed to resolve 'config-server.servers.svc.cluster.local'. Exceeded max queries per resolve 4 
    at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1047)
    at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:1000)
    at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:418)
    at io.netty.resolver.dns.DnsResolveContext.onResponse(DnsResolveContext.java:629)
    at io.netty.resolver.dns.DnsResolveContext.access$400(DnsResolveContext.java:66)
    at io.netty.resolver.dns.DnsResolveContext$2.operationComplete(DnsResolveContext.java:462)
    at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578)
    at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571)
    at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550)
    at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491)
    at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616)
    at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:605)
    at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:104)
    at io.netty.resolver.dns.DnsQueryContext.trySuccess(DnsQueryContext.java:216)
    at io.netty.resolver.dns.DnsQueryContext.finish(DnsQueryContext.java:208)
    at io.netty.resolver.dns.DnsNameResolver$DnsResponseHandler.channelRead(DnsNameResolver.java:1314)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
    at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:97)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496)
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:833)
</code></pre>
<p>If i set <code>-Dvertx.disableDnsResolver=true</code> however it seems like it doesn't even connect to my server instead (no request received on server side and no config being read)</p>
<pre><code>
2022-05-06 06:54:24,160 DEBUG [io.net.uti.ResourceLeakDetector] (main) -Dio.netty.leakDetection.level: simple
2022-05-06 06:54:24,161 DEBUG [io.net.uti.ResourceLeakDetector] (main) -Dio.netty.leakDetection.targetRecords: 4
2022-05-06 06:54:24,172 DEBUG [io.net.cha.MultithreadEventLoopGroup] (main) -Dio.netty.eventLoopThreads: 2
2022-05-06 06:54:24,181 DEBUG [io.net.uti.int.InternalThreadLocalMap] (main) -Dio.netty.threadLocalMap.stringBuilder.initialSize: 1024
2022-05-06 06:54:24,181 DEBUG [io.net.uti.int.InternalThreadLocalMap] (main) -Dio.netty.threadLocalMap.stringBuilder.maxSize: 4096
2022-05-06 06:54:24,184 DEBUG [io.net.cha.nio.NioEventLoop] (main) -Dio.netty.noKeySetOptimization: false
2022-05-06 06:54:24,184 DEBUG [io.net.cha.nio.NioEventLoop] (main) -Dio.netty.selectorAutoRebuildThreshold: 512
2022-05-06 06:54:24,188 DEBUG [io.net.uti.int.PlatformDependent] (main) org.jctools-core.MpscChunkedArrayQueue: available
2022-05-06 06:54:24,478 DEBUG [io.qua.spr.clo.con.cli.run.VertxSpringCloudConfigGateway] (main) Attempting to read configuration from 'http://config-server.servers.svc.cluster.local:8888/my-camel-service/cloud'.
2022-05-06 06:54:24,560 DEBUG [io.net.uti.NetUtil] (main) -Djava.net.preferIPv4Stack: false
2022-05-06 06:54:24,560 DEBUG [io.net.uti.NetUtil] (main) -Djava.net.preferIPv6Addresses: false
2022-05-06 06:54:24,561 DEBUG [io.net.uti.NetUtilInitializations] (main) Loopback interface: lo (lo, 127.0.0.1)
2022-05-06 06:54:24,562 DEBUG [io.net.uti.NetUtil] (main) /proc/sys/net/core/somaxconn: 1024
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.numHeapArenas: 2
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.numDirectArenas: 2
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.pageSize: 8192
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.maxOrder: 3
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.chunkSize: 65536
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.smallCacheSize: 256
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.normalCacheSize: 64
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.maxCachedBufferCapacity: 32768
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.cacheTrimInterval: 8192
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.cacheTrimIntervalMillis: 0
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.useCacheForAllThreads: true
2022-05-06 06:54:24,779 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-1) -Dio.netty.allocator.maxCachedByteBuffersPerChunk: 1023
2022-05-06 06:54:24,859 DEBUG [io.net.buf.ByteBufUtil] (vert.x-eventloop-thread-1) -Dio.netty.allocator.type: pooled
2022-05-06 06:54:24,859 DEBUG [io.net.buf.ByteBufUtil] (vert.x-eventloop-thread-1) -Dio.netty.threadLocalDirectBufferSize: 0
2022-05-06 06:54:24,859 DEBUG [io.net.buf.ByteBufUtil] (vert.x-eventloop-thread-1) -Dio.netty.maxThreadLocalCharBufferSize: 16384
2022-05-06 06:54:25,056 DEBUG [io.net.buf.AbstractByteBuf] (vert.x-eventloop-thread-1) -Dio.netty.buffer.checkAccessible: true
2022-05-06 06:54:25,056 DEBUG [io.net.buf.AbstractByteBuf] (vert.x-eventloop-thread-1) -Dio.netty.buffer.checkBounds: true
2022-05-06 06:54:25,056 DEBUG [io.net.uti.ResourceLeakDetectorFactory] (vert.x-eventloop-thread-1) Loaded default ResourceLeakDetector: io.netty.util.ResourceLeakDetector@7e719269
2022-05-06 06:54:25,180 DEBUG [io.net.uti.Recycler] (vert.x-eventloop-thread-1) -Dio.netty.recycler.maxCapacityPerThread: 4096
2022-05-06 06:54:25,181 DEBUG [io.net.uti.Recycler] (vert.x-eventloop-thread-1) -Dio.netty.recycler.ratio: 8
2022-05-06 06:54:25,181 DEBUG [io.net.uti.Recycler] (vert.x-eventloop-thread-1) -Dio.netty.recycler.chunkSize: 32
2022-05-06 06:54:25,181 DEBUG [io.net.uti.Recycler] (vert.x-eventloop-thread-1) -Dio.netty.recycler.blocking: false
2022-05-06 06:54:26,563 DEBUG [io.net.buf.PoolThreadCache] (vert.x-eventloop-thread-1) Freed 2 thread-local buffer(s) from thread: vert.x-eventloop-thread-1
</code></pre>
<p>If i startup an application with the previous version of quarkus I get:</p>
<pre><code>

2022-05-06 07:21:16,937 DEBUG [io.net.uti.int.PlatformDependent] (main) org.jctools-core.MpscChunkedArrayQueue: available
2022-05-06 07:21:16,953 DEBUG [io.net.res.dns.DefaultDnsServerAddressStreamProvider] (main) Default DNS servers: [/10.24.0.10:53] (sun.net.dns.ResolverConfiguration)
2022-05-06 07:21:16,956 DEBUG [io.net.uti.NetUtil] (main) -Djava.net.preferIPv4Stack: false
2022-05-06 07:21:16,956 DEBUG [io.net.uti.NetUtil] (main) -Djava.net.preferIPv6Addresses: false
2022-05-06 07:21:16,957 DEBUG [io.net.uti.NetUtilInitializations] (main) Loopback interface: lo (lo, 127.0.0.1)
2022-05-06 07:21:16,957 DEBUG [io.net.uti.NetUtil] (main) /proc/sys/net/core/somaxconn: 1024
2022-05-06 07:21:17,248 DEBUG [io.qua.spr.clo.con.cli.run.VertxSpringCloudConfigGateway] (main) Attempting to read configuration from 'http://config-server.servers.svc.cluster.local:8888/my-camel-gateway/cloud'.
2022-05-06 07:21:17,541 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-0) -Dio.netty.allocator.numHeapArenas: 2
2022-05-06 07:21:17,541 DEBUG [io.net.buf.PooledByteBufAllocator] (vert.x-eventloop-thread-0) -Dio.netty.allocator.numDirectArenas: 2
</code></pre>
<p>Is there a way to make it use my local dns configuration  properly?</p>

mangusbrother
<p>I set <code>quarkus.naming.enableJndi=true</code> and didn't use <code>-Dvertx.disableDnsResolver</code>  and my app started using the intended dns again</p>
