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From "Andy LoPresto (JIRA)" <>
Subject [jira] [Updated] (NIFI-5567) EvaluateXPath processor produces empty string sets for valid XPaths
Date Mon, 03 Sep 2018 21:17:00 GMT


Andy LoPresto updated NIFI-5567:
    Component/s: Extensions

> EvaluateXPath processor produces empty string sets for valid XPaths
> -------------------------------------------------------------------
>                 Key: NIFI-5567
>                 URL:
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>    Affects Versions: 1.7.1
>            Reporter: Christof Dilcher
>            Priority: Major
>              Labels: XPath, xml
>         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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