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https://issues.apache.org/struts/browse/STR-3161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Benedict updated STR-3161:
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Fix Version/s: 1.4.0
> Servlet not injected into newly created action in higly concurrent env
> ----------------------------------------------------------------------
>
> Key: STR-3161
> URL: https://issues.apache.org/struts/browse/STR-3161
> Project: Struts 1
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.3.8
> Environment: win xp, jvm 1.5.0_12
> Reporter: Bartek Wasko
> Assignee: Niall Pemberton
> Fix For: 1.3.10, 1.4.0
>
> Attachments: RequestProcessor.patch
>
>
> In struts 1.3.8 we encountered such an issue
> getServlet() invoked from action code returns null.
> After quick investigation I found a bit susspicious place in the
> RequestProcessor#processActionCreate code.
> The synchronized block seems to be a bit risky in highly concurrent
> environment because it does not cover also the code injecting servlet into
> freshly created action:
> if (instance.getServlet() == null) {
> instance.setServlet(this.servlet);
> }
> After I had extended synchronisation to above code fragment, it seems, our
> nullpointer vanished.
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