[GitHub] [pulsar] thomas-turner commented on issue #20282: [Bug] DnsResolverUtil "Cannot get DNS TTL settings from sun.net.InetAddressCachePolicy class" in Java 17

["thomas-turner (via GitHub)" <gi...@apache.org>]

thomas-turner commented on issue #20282:
URL: https://github.com/apache/pulsar/issues/20282#issuecomment-1617948821

   Running into a similar problem using Pulsar Client 3.0.0 and JDK 17 in one of our microservices:
   
   ```
   2023-07-03 11:58:41.915  WARN 19312 --- [           main] o.a.p.c.u.n.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 @1a708820
   ```
   
   This occurs when we build the `PulsarClient` object from the `client.api` package.
   I have tried, as mentioned above, adding `--add-opens java.base/sun.net=ALL-UNNAMED` to my VM args when running the service but I still get this exception.
   On top of that I have also tried building `branch-3.0` locally and I still get the exception with that build.
   Perhaps this issue is more widespread than just the functions local runner?


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