Network is unreachable, trying to bootstrap from given hostname directly

Hi Team,
We are trying to upgrade from couchbase java sdk client 2.7.7 to 3.2.2. We are getting the below warning when trying to run the application. Can you please help here.

2022-06-16 19:05:21:913:WARN:com.couchbase.core(567)::[com.couchbase.core][DnsSrvLookupFailedEvent][323ms] DNS SRV lookup failed (java.net.SocketException: Network is unreachable), trying to bootstrap from given hostname directly.
java.io.UncheckedIOException: java.net.SocketException: Network is unreachable
	at sun.nio.ch.DatagramSocketAdaptor.disconnect(DatagramSocketAdaptor.java:136) ~[?:?]
	at java.net.DatagramSocket.disconnect(DatagramSocket.java:393) ~[?:?]
	at com.sun.jndi.dns.DnsClient.doUdpQuery(DnsClient.java:437) ~[jdk.naming.dns:?]
	at com.sun.jndi.dns.DnsClient.query(DnsClient.java:214) ~[jdk.naming.dns:?]
	at com.sun.jndi.dns.Resolver.query(Resolver.java:81) ~[jdk.naming.dns:?]
	at com.sun.jndi.dns.DnsContext.c_getAttributes(DnsContext.java:434) ~[jdk.naming.dns:?]
	at com.sun.jndi.toolkit.ctx.ComponentDirContext.p_getAttributes(ComponentDirContext.java:235) ~[?:?]
	at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.getAttributes(PartialCompositeDirContext.java:141) ~[?:?]
	at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.getAttributes(PartialCompositeDirContext.java:129) ~[?:?]
	at javax.naming.directory.InitialDirContext.getAttributes(InitialDirContext.java:171) ~[?:?]
	at com.couchbase.client.core.util.DnsSrv.loadDnsRecords(DnsSrv.java:110) ~[core-io-2.2.2.jar:?]
	at com.couchbase.client.core.util.DnsSrv.fromDnsSrv(DnsSrv.java:98) ~[core-io-2.2.2.jar:?]
	at com.couchbase.client.core.util.DnsSrv.fromDnsSrv(DnsSrv.java:68) ~[core-io-2.2.2.jar:?]
	at com.couchbase.client.core.util.ConnectionStringUtil.seedNodesFromConnectionString(ConnectionStringUtil.java:73) ~[core-io-2.2.2.jar:?]
	at com.couchbase.client.java.AsyncCluster.seedNodesFromConnectionString(AsyncCluster.java:228) ~[java-client-3.2.2.jar:?]
	at com.couchbase.client.java.Cluster.connect(Cluster.java:259) ~[java-client-3.2.2.jar:?]
	at com.aexp.abprofiler.db.CouchbaseProvider.initializeCluster(CouchbaseProvider.java:104) ~[classes/:?]
	at com.aexp.abprofiler.db.CouchbaseProvider.initializeClusters(CouchbaseProvider.java:78) ~[classes/:?]
	at com.aexp.abprofiler.db.CouchbaseProvider.initialize(CouchbaseProvider.java:62) ~[classes/:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[?:?]
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
	at java.lang.reflect.Method.invoke(Method.java:564) ~[?:?]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:440) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:639) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:639) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.18.jar:5.3.18]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.17.jar:5.3.17]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.17.jar:5.3.17]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.11.jar:2.5.11]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.5.11.jar:2.5.11]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:448) ~[spring-boot-2.5.11.jar:2.5.11]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:339) ~[spring-boot-2.5.11.jar:2.5.11]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1365) ~[spring-boot-2.5.11.jar:2.5.11]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354) ~[spring-boot-2.5.11.jar:2.5.11]
	at com.aexp.abprofiler.main.ABProfilerApplication.main(ABProfilerApplication.java:18) ~[classes/:?]
Caused by: java.net.SocketException: Network is unreachable
	at sun.nio.ch.DatagramChannelImpl.disconnect0(Native Method) ~[?:?]
	at sun.nio.ch.DatagramChannelImpl.disconnect(DatagramChannelImpl.java:1294) ~[?:?]
	at sun.nio.ch.DatagramSocketAdaptor.disconnect(DatagramSocketAdaptor.java:134) ~[?:?]
	... 71 more

Hi Mehak,

I wonder if this could be related to JVM issue JDK-8272996. Can you try upgrading to the latest version of Java 17?

(If you’re not connecting to Couchbase Capella, and not using DNS SRV, this warning is annoying but harmless.)

Thanks,
David