[jboss-as7-dev] TS: Bad approach used as fallback mechanism for gathering IP address

[Stuart Douglas]

On 03/03/2012, at 12:31 AM, Pavel Janousek wrote:

> Hi,
> 
> I've investigated some issue now and seen there are several places in TS where we can see similar code like this:
> 
> static final String someIPproperty = System.getProperty("<some key>", "localhost"); 
> 
> or
> 
> static final String someIPproperty = System.getProperty("<some key>", "127.0.0.1"); 
> 
> As you can see above, this fallback mechanism is bound in this case (key value isn't found) to IPv4 only IP address at all. This approach is bad because we can run in other network stack - IPv6 is presented in these days - and in this case the such testcase fails with some strange error due to this issue.

The fallbacks are there for cases when no other stack is specified. As of today the test suite should honour all setting specified by the node0 and node1 addresses. If you are running under another network stack and have configured the build properly then these fallbacks should never be hit, they will only be used in the normal mvn install case with not other addresses set. 

To be honest this sort of fallback should probably be implemented in the pom, so that the system properties are always defined. Feel free to volunteer to fix it.  

Stuart


> 
> I think we have two option how to resolve this issue:
> 
> 1) Don't use fallback mechanism at all and fix (= remove) them in present testcases
> 
> 2) Create auxiliary class which return 127.0.0.1 or ::1 string (but not string "localhost" because we can't be sure how it is translated (*))
> 
> (*) common setup in Linux is to translate localhost -> 127.0.0.1 and localhost6 -> ::1
> 
> 
> Ad 1) I prefer this option because some forget/miss setting is very easy to catch
> 
> Ad 2) This auxiliary class should need to make some magic decision in which IP network stack mode we are now running and return IPv4 or IPv6 lookpack address accordingly.
> 
> WDYT about this?
> 
> --
> Pavel Janousek
> Senior JBoss QA Engineer
> 
> 
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