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DnsNameResolver uses public dns servers in java 9

See original GitHub issue

I realise this is known, but it seems broken enough to deserve a tracking issue.

Expected behavior

Should use system dns servers

Actual behavior

Logs a warning “Default DNS servers: [/8.8.8.8:53, /8.8.4.4:53] (Google Public DNS as a fallback)” Then uses the google servers.

n.b. It logs the warning even if you manually set the nameServerAddresses

    .nameServerAddresses(
        DnsServerAddresses.sequential(new InetSocketAddress("x.x.x.x", 53),
            new InetSocketAddress("x.x.x.x", 53)))

Steps to reproduce

Minimal yet complete reproducer code (or URL to code)

Netty version

JVM version (e.g. `java -version`)

java version “9-ea” Java™ SE Runtime Environment (build 9-ea+149) Java HotSpot™ 64-Bit Server VM (build 9-ea+149, mixed mode)

OS version (e.g. `uname -a`)

Workaround

set on command line

–add-opens=java.base/sun.net.dns=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.nio=ALL-UNNAMED --add-opens=java.base/sun.nio.ch=ALL-UNNAMED

Issue Analytics

State:
Created 7 years ago
Comments:6 (6 by maintainers)

Top GitHub Comments

1reaction

normanmaurercommented, Feb 11, 2017

@yschimke thanks for reporting… working on a fix

0reactions

normanmaurercommented, Apr 19, 2017

Fixed by https://github.com/netty/netty/pull/6590

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