Re: [grpc-io] io.grpc.internal.ManagedChannelImpl$NameResolverListener handleErrorInSyncContext

[Eric Anderson]

> java.net.UnknownHostException: Host sconosciuto (voloOK)

The host name does not exist. Check the spelling, search path, or which DNS server your machine is configured to use. You can use `ping` to check if DNS resolution is working as you expect.

On Wed, Mar 22, 2023 at 7:41 AM VALENTINA FERRO <valentin...@gmail.com> wrote:

Hi,

I have this problem io.grpc.internal.ManagedChannelImpl$NameResolverListener handleErrorInSyncContext:

mar 22, 2023 3:27:48 PM io.grpc.internal.ManagedChannelImpl$NameResolverListener handleErrorInSyncContext
WARNING: [Channel<1>: (voloOK:50051)] Failed to resolve name. status=Status{code=UNAVAILABLE, description=Unable to resolve host voloOK, cause=java.lang.RuntimeException: java.net.UnknownHostException: Host sconosciuto (voloOK)
at io.grpc.internal.DnsNameResolver.resolveAddresses(DnsNameResolver.java:223)
at io.grpc.internal.DnsNameResolver.doResolve(DnsNameResolver.java:282)
at io.grpc.internal.DnsNameResolver$Resolve.run(DnsNameResolver.java:318)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.net.UnknownHostException: Host sconosciuto (voloOK)
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:52)
at java.base/java.net.InetAddress$PlatformResolver.lookupByName(InetAddress.java:1048)
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1648)
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:997)
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1638)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1504)
at io.grpc.internal.DnsNameResolver$JdkAddressResolver.resolveAddress(DnsNameResolver.java:631)
at io.grpc.internal.DnsNameResolver.resolveAddresses(DnsNameResolver.java:219)
... 5 more
}
Exception in thread "AWT-EventQueue-0" io.grpc.StatusRuntimeException: UNAVAILABLE: Unable to resolve host voloOK
at io.grpc.Status.asRuntimeException(Status.java:539)
at io.grpc.stub.ClientCalls$BlockingResponseStream.hasNext(ClientCalls.java:662)
at clientGrpc.Client.promozioni(Client.java:245)
at observer_mediator.observer.Controller_Director.notificaWidget(Controller_Director.java:331)
at observer_mediator.mediator.ConcreteWidgetClass.notifica(ConcreteWidgetClass.java:28)
at observer_mediator.mediator.ConcreteWidgetClass$2.mouseClicked(ConcreteWidgetClass.java:56)
at java.desktop/java.awt.Component.processMouseEvent(Component.java:6619)
at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3398)
at java.desktop/java.awt.Component.processEvent(Component.java:6381)
at java.desktop/java.awt.Container.processEvent(Container.java:2266)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4991)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4823)
at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4584)
at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4823)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:775)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:747)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:744)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.RuntimeException: java.net.UnknownHostException: Host sconosciuto (voloOK)
at io.grpc.internal.DnsNameResolver.resolveAddresses(DnsNameResolver.java:223)
at io.grpc.internal.DnsNameResolver.doResolve(DnsNameResolver.java:282)
at io.grpc.internal.DnsNameResolver$Resolve.run(DnsNameResolver.java:318)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.net.UnknownHostException: Host sconosciuto (voloOK)
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:52)
at java.base/java.net.InetAddress$PlatformResolver.lookupByName(InetAddress.java:1048)
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1648)
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:997)
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1638)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1504)
at io.grpc.internal.DnsNameResolver$JdkAddressResolver.resolveAddress(DnsNameResolver.java:631)
at io.grpc.internal.DnsNameResolver.resolveAddresses(DnsNameResolver.java:219)
... 5 more

How can I solve a problem?
Thanks

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