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From "Christof Dilcher (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NIFI-5567) EvaluateXPath processor produces empty string sets for valid XPaths
Date Mon, 03 Sep 2018 17:45:00 GMT

    [ https://issues.apache.org/jira/browse/NIFI-5567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16602372#comment-16602372
] 

Christof Dilcher commented on NIFI-5567:
----------------------------------------

Hi [~alopresto],

hi  [~mattyb149],

could you please have a quick look at this?

I am pretty sure I am doing everything right as it seems to be working with the InvokeHTTP
processor.

Just with the GetFile processor (which is obligatory for me to use in this case) it has this
weird behavior described above.

Thanks!

Christof

 

> EvaluateXPath processor produces empty string sets for valid XPaths
> -------------------------------------------------------------------
>
>                 Key: NIFI-5567
>                 URL: https://issues.apache.org/jira/browse/NIFI-5567
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Christof Dilcher
>            Priority: Major
>         Attachments: EvaluateXPath_ExampleXML_empty_string_set.xml, EvaluateXPath_FlowFile_Attributes_empty_string_set.png,
EvaluateXPath_ProcessorConfiguration_empty_string_set.png, EvaluateXPath_Template.png, EvaluateXPath_Template_empty_string_set.xml
>
>
> I have found that valid XPath expressions apparently produce empty strings in EvaluateXPath
processor which can be observed in the attached screenshots. I am using nifi 1.7.1 and jdk1.8.0_181.jdk.
Any help would be appreciated!
> The source of the XML files is a GetFile Processor or a GenrateFlowFile Processor.
> I have also tested it with an InvokeHTTP processor where it works fine. However this
does not solve it for me as I am dealing with physical XML files here. However this little
detail might be interesting for the error finding process.



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