lhotari opened a new issue, #15349:
URL: https://github.com/apache/pulsar/issues/15349
**Describe the bug**
DnsResolverUtil fails to get existing DNS TTL settings. This happens in Java
17. Error message:
```
WARN org.apache.pulsar.common.util.netty.DnsResolverUtil - Cannot get DNS
TTL settings from sun.net.InetAddressCachePolicy class
java.lang.IllegalAccessException: class
org.apache.pulsar.common.util.netty.DnsResolverUtil cannot access class
sun.net.InetAddressCachePolicy (in module java.base) because module java.base
does not export sun.net to unnamed module @3932c79a
at
jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:392)
~[?:?]
at
java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:674) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:560) ~[?:?]
at
org.apache.pulsar.common.util.netty.DnsResolverUtil.<clinit>(DnsResolverUtil.java:46)
~[org.apache.pulsar-pulsar-common-2.11.0-SNAPSHOT.jar:2.11.0-SNAPSHOT]
at
org.apache.pulsar.client.impl.ConnectionPool.createDnsNameResolver(ConnectionPool.java:116)
~[org.apache.pulsar-pulsar-client-original-2.11.0-SNAPSHOT.jar:2.11.0-SNAPSHOT]
```
**To Reproduce**
Use Pulsar Java Client in Java 17
**Expected behavior**
Pulsar Java Client should be able to detect DNS TTL settings used in Java
and apply them to Netty's DnsNameResolverBuilder.
**Additional context**
#15219
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