[jboss-jira] [JBoss JIRA] (WFLY-10134) ee8.preview.mode property is racy

[David Lloyd (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-10134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13553212#comment-13553212 ] 

David Lloyd commented on WFLY-10134:
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>From my TRACE test output, it looks like {{javax.servlet.api}} is loaded by the Undertow extension (in this case by {{ServerService Thread Pool \-\- 65}}) chronologically ahead of the system property configuration being processed (which happens in {{Controller Boot Thread}}).

> ee8.preview.mode property is racy
> ---------------------------------
>
>                 Key: WFLY-10134
>                 URL: https://issues.jboss.org/browse/WFLY-10134
>             Project: WildFly
>          Issue Type: Bug
>          Components: EE
>            Reporter: David Lloyd
>            Priority: Critical
>
> The {{ee8-temp}} tests set the {{ee8.preview.mode}} property in the server management model, relying on system properties to get parsed and set before extensions which use Java EE 8 APIs are loaded.  This assumption appears to be invalid.
> System properties are installed by the boot controller thread, and extensions are loaded in server service threads.  In testing with the latest jboss-modules, I've observed cases where the controller thread does not add system properties until after some extension loading has happened in the server service threads.  I haven't untangled why this happens only with the most recent jboss-modules in play, but the race exists regardless.
> Setting the {{ee8.preview.mode}} in {{arquillian.xml}} appears to work around the issue.



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