Any suggestions, or should I maybe post this on the Nutch-dev list too?
To me it seems a bit strange that the MSBaseParser.java opens for the
possibility that your properties object may be set to null and then later
can give rise to an NPE at the call:
title = properties.getProperty(DublinCore.TITLE);
Comments?
Thanks,
Trym
tryma wrote:
>
> Hi,
>
> I initially thought there was an issue with POI so I posted my initial
> question on the POI-user list.
> Actually, now I see this is happening in the Nutch classes for the MS
> parse plugin, not POI, so I'm giving this list a go.
>
> Here's a trace I get when I catch any exception occurring as I attempt to
> call the MSExcelParser's getParse(Content). It seems I get an NPE in
> MSBaseParser.getParse().
>
> [#|2006-10-04T09:13:15.102+0200|WARNING|sun-appserver-ee9.1|javax.enterprise.system.stream.err|_ThreadID=16;_ThreadName=httpWorkerThread-8080-1;_RequestID=0b18e2ae-0f79-4241-9e29-a322c8ae2bc6;|
> java.lang.NullPointerException
> at org.apache.nutch.parse.ms.MSBaseParser.getParse(MSBaseParser.java:94)
> at
> org.apache.nutch.parse.msexcel.MSExcelParser.getParse(MSExcelParser.java:40)
> at
> <my_package>.DocumentParser.parseDocument(DocumentParser.java:154)
> ...
>
> Looking at the source (MSBaseParser.java) at this line, it goes:
>
> ****SNIP****
> extractor.extract(new ByteArrayInputStream(raw));
> text = extractor.getText();
> properties = extractor.getProperties();
> outlinks = OutlinkExtractor.getOutlinks(text, content.getUrl(),
> getConf());
>
> } catch (Exception e) {
> return new ParseStatus(ParseStatus.FAILED,
> "Can't be handled as micrsosoft document. " +
> e)
> .getEmptyParse(this.conf);
> }
>
> // collect meta data
> Metadata metadata = new Metadata();
> title = properties.getProperty(DublinCore.TITLE); <==========
> This is line 94 as indicated in the trace
> properties.remove(DublinCore.TITLE);
> ****SNIP****
>
> So I can only gather that my properties object is null. As seen above in
> the snippet from the MSBaseParser source, properties is initially null but
> assigned a value from the ExcelExtractor (properties =
> extractor.getProperties();) which I assume is becoming null.
>
> Any ideas how I can get around this or if I'm not setting some required
> properties?
>
> Btw, I've noticed a spelling mistake in the ParseStatus that is returned
> in the above lines of code; "Micrsosoft"
>
>
> Thanks,
> Trym
>
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