Unable to resolve hostname 'api.sandbox.push.apple.com'

[himanshu paliwal]

Hi,

I have moved to Pushy to send push to Apple using new Http 2 API. 

I have added this dependency

<dependency>

<groupId>com.eatthepath</groupId>

<artifactId>pushy</artifactId>

<version>0.14.2</version>

</dependency>

I have installed both root certificates

GeoTrust Global CA root certificate

AAA Certificate Services root certificate

as mentioned in developer apple documentation

https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server

Tried both authentication types 

Token-Based Connection to APNs

Certificate-Based Connection to APNs

But I am getting following error every time sending a push

java.net.UnknownHostException: failed to resolve 'api.sandbox.push.apple.com' after 2 queries 

at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1005) ~[netty-resolver-dns-4.1.53.Final.jar:4.1.53.Final]

at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:958) ~[netty-resolver-dns-4.1.53.Final.jar:4.1.53.Final]

I tried adding excluding netty dependencies, changed versions but I am unable to get rid of it.

Can any one suggest a solution?

Thanks.