[jboss-jira] [JBoss JIRA] (DROOLS-1359) Race condition in MVELDialectRuntimeData.getParserConfiguration

[Anuj Shah (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-1359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13323161#comment-13323161 ] 

Anuj Shah commented on DROOLS-1359:
-----------------------------------

Just committed the test case:
https://github.com/anujshahwork/testcode/tree/master/drools1359

> Race condition in MVELDialectRuntimeData.getParserConfiguration
> ---------------------------------------------------------------
>
>                 Key: DROOLS-1359
>                 URL: https://issues.jboss.org/browse/DROOLS-1359
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 5.5.0.Final, 6.5.0.Final
>            Reporter: Anuj Shah
>            Assignee: Mario Fusco
>
> MVELDialectRuntimeData attempts to hold a lazy loaded ParserConfiguration. The getParserConfiguration method sets this to a new configuration object and then sets the imports on the configuration. Between these two steps another thread could retrieve the stale configuration and use it. This could result in a number of exceptions in compilation.
> A simple fix is to delay assignment of new ParserConfiguration until after the imports are set.



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