Thorsten Meinl created TOMEE-2176:

             Summary: Arquillian test cannot be run in parallel
                 Key: TOMEE-2176
             Project: TomEE
          Issue Type: Bug
          Components: TomEE Arquillian Adapters
    Affects Versions: 7.0.3
            Reporter: Thorsten Meinl

In order to speed up tests, I wanted to run them in parallel using Maven 
Surefire's parallel execution capabilities. But even when running every test 
class in its own forked VM tests were failing randomly, mostly due to missing 
files in the temporary container directory. The reason is that all temporary 
containers will use the same directory, which is

{{dir = System.getProperty("") + "/arquillian-apache-tomee"}} 
{{appWorkingDir = System.getProperty("") + 

(see {{org.apache.openejb.arquillian.common.TomEEConfiguration}}).

This means different processes running TomEE via Arquillian will interfere with 
each other, even completely independent process and even from different users.
As a solution the above-mention directories must be created such that they are 
unique for the process, e.g. by using {{java.nio.Files.createTempDirectory}}.


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