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https://issues.apache.org/jira/browse/OWB-354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12857115#action_12857115
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Gurkan Erdogdu commented on OWB-354:
------------------------------------

Using of Thread local is related with current context of the current thread. 
Please see context section is spec.

> WebContextService may throw NPE in tiered classloading environmemt
> ------------------------------------------------------------------
>
>                 Key: OWB-354
>                 URL: https://issues.apache.org/jira/browse/OWB-354
>             Project: OpenWebBeans
>          Issue Type: Bug
>          Components: Context and Scopes
>    Affects Versions: M4
>            Reporter: Joe Bergmark
>            Assignee: Joe Bergmark
>             Fix For: 1.0.0
>
>
> WebContextService sets the static context variables (which are ThreadLocals) 
> to null during a call to destroy.  For example requestContext.
> In a classloading environment where the same WebContextService would be 
> shared between webapps, this could lead to a NullPointerException in another 
> application as the static variable has been set to null and that static would 
> be shared.

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