[jira] [Created] (ORCHESTRA-68) RequestParameterProviderManager.encodeAndAttachParameters might throw NullPointerException

["Leo Büttiker (JIRA)" <de...@myfaces.apache.org>]

Leo Büttiker created ORCHESTRA-68:
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             Summary: RequestParameterProviderManager.encodeAndAttachParameters might throw NullPointerException 
                 Key: ORCHESTRA-68
                 URL: https://issues.apache.org/jira/browse/ORCHESTRA-68
             Project: MyFaces Orchestra
          Issue Type: Bug
          Components: RequestParameterProvider
    Affects Versions: 1.5
            Reporter: Leo Büttiker


Under certain circumstances which I unfortunately can not reproduce all the time (during a heavy load selenium test with ajax) the method RequestParameterProviderManager.encodeAndAttachParameters throws an expection because a provider in the list providers is null. 

The assumption is that due to multi-threading the array list might get corrupt under certain conditions. When I replace the list with a synchronized list the error does not occur. Fixing the bug can therefor achieved by replacing getProviders with:

{code}
    protected List getProviders() {
        if (providers == null) {
            providers = Collections.synchronizedList(new ArrayList());
        }

        return providers;
    }
{code}



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