[RFR] 8219640: UnresolvedAddressException not thrown for incorrect hostname

[Chris Hegarty]

> On 3 Sep 2019, at 17:29, Chris Hegarty <chris.hegarty at oracle.com> wrote:
> ... 
> Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.15.0-54-generic x86_64)
> 
> * Documentation:  https://help.ubuntu.com
> * Management:     https://landscape.canonical.com
> * Support:        https://ubuntu.com/advantage
> ...
> $ uname -a
> Linux chegar 4.15.0-54-generic #58~16.04.1-Ubuntu SMP Mon Jun 24 13:21:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
> 
> $ ~/binaries/jdk-11/bin/jshell 
> |  Welcome to JShell -- Version 11
> |  For an introduction type: /help intro
> 
> jshell> java.net.InetAddress.getByName("127.0.0.1 tttt")
> $1 ==> 127.0.0.1 tttt/127.0.0.1
> 

From the same Linux system:

$ ldd --version
ldd (Ubuntu GLIBC 2.23-0ubuntu11) 2.23
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.

$ lsof -p $$ | grep libc
bash    23087 chhegar  mem    REG  253,0  1868984 1443412 /lib/x86_64-linux-gnu/libc-2.23.so

$  /lib/x86_64-linux-gnu/libc-2.23.so --version
GNU C Library (Ubuntu GLIBC 2.23-0ubuntu11) stable release version 2.23, by Roland McGrath et al.
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 5.4.0 20160609.
Available extensions:
	crypt add-on version 2.1 by Michael Glad and others
	GNU Libidn by Simon Josefsson
	Native POSIX Threads Library by Ulrich Drepper et al
	BIND-8.2.3-T5B
libc ABIs: UNIQUE IFUNC
For bug reporting instructions, please see:
<https://bugs.launchpad.net/ubuntu/+source/glibc/+bugs>.


-Chris.