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https://issues.apache.org/jira/browse/TRINIDAD-1751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12846560#action_12846560
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Matthias Weßendorf commented on TRINIDAD-1751:
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This issue has been created (introduced) by this commit:
http://svn.apache.org/viewvc?view=revision&revision=820104
> NPE if User-Agent header is missing
> -----------------------------------
>
> Key: TRINIDAD-1751
> URL: https://issues.apache.org/jira/browse/TRINIDAD-1751
> Project: MyFaces Trinidad
> Issue Type: Bug
> Components: Components
> Affects Versions: 1.2.13-core
> Reporter: Harald Kuhn
> Attachments: TRINIDAD-1751.patch
>
>
> After a upgrade from trinidad 1.2.11 to Trinidad 1.2.13 I get a
> NullPointerException from one of our monitoring scripts.
> Caused by: java.lang.NullPointerException
> at
> org.apache.myfaces.trinidadinternal.agent.AgentFactoryImpl._populateAgentImpl(AgentFactoryImpl.java:115)
> at
> org.apache.myfaces.trinidadinternal.agent.AgentFactoryImpl.createAgent(AgentFactoryImpl.java:65)
> at
> org.apache.myfaces.trinidadinternal.context.RequestContextImpl.getAgent(RequestContextImpl.java:695)
> at
> org.apache.myfaces.trinidadinternal.renderkit.core.CoreRenderKit.chooseRenderKit(CoreRenderKit.java:139)
> at
> org.apache.myfaces.trinidadinternal.renderkit.CoreRenderKitFactory.getRenderKit(CoreRenderKitFactory.java:52)
> While tracking this issue further down it showed that the monitoring script
> doesn't send a User-Agent header along with the request.
> This case isn't considered any more in AgentFactoryImpl._populateAgentImpl().
> The version from Trinidad 1.2.11 used to have the following code block:
> if (userAgent == null)
> {
> _populateUnknownAgentImpl(null, agent);
> return;
> }
> it looks has been changed/removed in this rev:
> http://svn.apache.org/viewvc?view=revision&revision=820104
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