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"No Route To Host" Exception Trying to Download JNLP Resources over IPv6 on Mac OS X (Doc ID 2488051.1)

Last updated on JUNE 05, 2021

Applies to:

Java SE JDK and JRE - Version 8 to 8
Apple Mac OS X (Intel) (64-bit)
Apple Mac OS X (Intel) (32-bit)


When trying to launch an application by JNLP on Mac OS X to an IPv6 server address, Java WebStart reports a "No route to host" exception. Web browsers on this system are able to load pages from this IPv6 address.  The command line tool ping6 is able to ping it.  It seems that Java WebStart has some problem with routing.  Testing with the IPv6 interface added to the JNLP address is able to load the resources.  For example, if %en1 is added to specify which interface to use:


While the problem is seen consistently in machines that exhibit it, other Mac OS X systems on different parts of the network do see the issue.




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