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https://jira.codehaus.org/browse/SUREFIRE-1068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=342947#comment-342947
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Andreas Gudian commented on SUREFIRE-1068:
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I think the main problem is, that I chose $\{..\} to surround the placeholder.
I'm tempted to change the implementation to favour @\{..\}, as introduced by a
pull-request in SUREFIRE-1047.
> forkNumber in systemPropertyVariables requires prefix
> -----------------------------------------------------
>
> Key: SUREFIRE-1068
> URL: https://jira.codehaus.org/browse/SUREFIRE-1068
> Project: Maven Surefire
> Issue Type: Bug
> Components: Maven Surefire Plugin
> Affects Versions: 2.16
> Reporter: Eric Pederson
> Priority: Minor
>
> The {{$\{surefire.forkNumber\}}} placeholder cannot be used alone in a
> {{systemPropertyVariable}}. The workaround is to prefix the value.
> For example, this doesn't work (the {{surefire.forkNumber}} system property
> does not exist when running the test).
> {code:xml}
> <systemPropertyVariables>
> <surefire.forkNumber>${surefire.forkNumber}</surefire.forkNumber>
> </systemPropertyVariables>
> {code}
> But this does:
> {code:xml}
> <systemPropertyVariables>
> <surefire.forkNumber>0${surefire.forkNumber}</surefire.forkNumber>
> </systemPropertyVariables>
> {code}
> (note the leading *0*)
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