FULL PRODUCT VERSION :
java version "9"
Java(TM) SE Runtime Environment (build 9+179)
Java HotSpot(TM) Server VM (build 9+179, mixed mode, emulated-client, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.14393]

A DESCRIPTION OF THE PROBLEM :
The DNS JNDI initial context can't be created with Java 9.

REGRESSION. Last worked in version 8u152

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I expect that I can use DNS without adding exports between any internal Java Modules.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
javax.naming.NoInitialContextException: Cannot instantiate class: com.sun.jndi.dns.DnsContextFactory [Root exception is java.lang.IllegalAccessException: class javax.naming.spi.NamingManager (in module java.naming) cannot access class com.sun.jndi.dns.DnsContextFactory (in module jdk.naming.dns) because module jdk.naming.dns does not export com.sun.jndi.dns to module java.naming]
    at java.naming/javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
    at java.naming/javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
    at java.naming/javax.naming.InitialContext.init(Unknown Source)
    at java.naming/javax.naming.InitialContext.<init>(Unknown Source)
    at java.naming/javax.naming.directory.InitialDirContext.<init>(Unknown Source)
    at ....
Caused by: java.lang.IllegalAccessException: class javax.naming.spi.NamingManager (in module java.naming) cannot access class com.sun.jndi.dns.DnsContextFactory (in module jdk.naming.dns) because module jdk.naming.dns does not export com.sun.jndi.dns to module java.naming
    at java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Unknown Source)
    at java.base/jdk.internal.reflect.Reflection.ensureMemberAccess(Unknown Source)
    at java.base/java.lang.Class.newInstance(Unknown Source)
    ... 62 more

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
Hashtable<String, String> env = new Hashtable();
env.put( "java.naming.factory.initial", "com.sun.jndi.dns.DnsContextFactory" );
DirContext dns = new InitialDirContext( env );
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Add export command line parameters