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Description of problem:

On upgrade 
from java-1.8.0-openjdk-1.8.0.51-1.b16.el6_7.i686 
to java-1.8.0-openjdk-1.8.0.51-2.b16.el6_7.i686 

there are few missing directories (rpm -Va java-1.8.0-openjdk\*):
missing     /usr/lib/jvm/jre-1.8.0-openjdk
missing     /usr/lib/jvm-exports/java-1.8.0-openjdk
missing     /usr/lib/jvm/java-1.8.0-openjdk

What makes is troublesome is the fact, that javac target link (in alternatives) is 
/usr/lib/jvm/java-1.8.0-openjdk/bin/javac and as 
/usr/lib/jvm/java-1.8.0-openjdk does not exist it causes 
-bash: /usr/bin/javac: No such file or directory


Steps to Reproduce:
1. install java-1.8.0-openjdk-1.8.0.51-1.b16.el6_7
2. update to new version
3. rpm -Va java-1.8.0-openjdk\*

Actual results:
missing directories

Expected results:
all set

Additional info:
This is problem only on 32bit

Same goes for /usr/lib/jvm/jre-1.8.0-openjdk and java target

Well, crap.

Part of the fix of  1254197 was :
 * changing some alternatives-controlled links to hardcoded links
 * inistead of %{_arch} in names use ifarch %32b ... someName... %else ..someName_x86_64.. %endif

The second is causing why you are seeing  it on 32b system only. The links in  rhel7-like naming are arch-less

The first is.. well crap.
http://fedoraproject.org/wiki/Packaging:ScriptletSnippets#Scriptlet_Ordering

original udpated package created links based on alternatives (created  in pre and removed in post)
new updating package will replace those links by hardcoded values (in install)
And pre of uninstalled package is happening after innstall. 
So removal of original package removes the hardcoded links in post.

Only slution in my mind is to recreate them in posttrans :(

One more idea. The origianl issue (1217177) was reported agains 64b java only.

So nobody cares about 32b? If so, then instead of ifarch ... else.... I would really go with name{arch}.
This will keep 1217177 fixed, will cause little bit inconsistent name on 32, but will remove need of posttrans.

fixed like c#4