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From "Ma, Xiaohui (NIH/NLM/LHC) [C]" <xiao...@mail.nlm.nih.gov>
Subject RE: how to deal with virtual collection in solr?
Date Thu, 26 Aug 2010 18:41:34 GMT
Thanks so much for your help! I will try it.


-----Original Message-----
From: Thomas Joiner [mailto:thomas.b.joiner@gmail.com] 
Sent: Thursday, August 26, 2010 2:36 PM
To: solr-user@lucene.apache.org
Subject: Re: how to deal with virtual collection in solr?

I don't know about the shards, etc.

However I recently encountered that exception while indexing pdfs as well.
 The way that I resolved it was to upgrade to a nightly build of Solr. (You
can find them https://hudson.apache.org/hudson/view/Solr/job/Solr-trunk/).

The problem is that the version of Tika that 1.4.1 using is a very old
version of Tika, which uses a old version of PDFBox to do its parsing.  (You
might be able to fix the problem just by replacing the Tika jars...however I
don't know if there have been any API changes so I can't really suggest
that.)

We didn't upgrade to trunk in order for that functionality, but it was nice
that it started working. (The PDFs we'll be indexing won't be of later
versions, but a test file was).

On Thu, Aug 26, 2010 at 1:27 PM, Ma, Xiaohui (NIH/NLM/LHC) [C] <
xiaohui@mail.nlm.nih.gov> wrote:

> Thanks so much for your help, Jan Høydahl!
>
> I made multiple cores (aa public, aa private, bb public and bb private). I
> knew how to query them individually. Please tell me if I can do a
> combinations through shards parameter now. If yes, I tried to append
> &shards=aapub,bbpub after query string. Unfortunately it didn't work.
>
> Actually all of content is the same. I don't have "collection" field in xml
> files. Please tell me how I can set a "collection" field in schema and
> simply search collection through filter.
>
> I used curl to index pdf files. I use Solr 1.4.1. I got the following error
> when I index pdf with version 1.5 and 1.6.
>
> *************************************
> <html>
> <head>
> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
> <title>Error 500 </title>
> </head>
> <body><h2>HTTP ERROR: 500</h2><pre>org.apache.tika.exception.TikaException:
> Unexpected RuntimeException from
> org.apache.tika.parser.pdf.PDFParser@134ae32
>
> org.apache.solr.common.SolrException:
> org.apache.tika.exception.TikaException: Unexpected RuntimeException from
> org.apache.tika.parser.pdf.PDFParser@134ae32
>        at
> org.apache.solr.handler.extraction.ExtractingDocumentLoader.load(ExtractingDocumentLoader.java:211)
>        at
> org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:54)
>        at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
>        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1316)
>        at
> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:338)
>        at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:241)
>        at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
>        at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
>        at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>        at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>        at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
>        at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>        at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
>        at
> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
>        at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>        at org.mortbay.jetty.Server.handle(Server.java:285)
>        at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
>        at
> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:835)
>        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:641)
>        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:202)
>        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
>        at
> org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
>        at
> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
> Caused by: org.apache.tika.exception.TikaException: Unexpected
> RuntimeException from org.apache.tika.parser.pdf.PDFParser@134ae32
>        at
> org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:121)
>        at
> org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:105)
>        at
> org.apache.solr.handler.extraction.ExtractingDocumentLoader.load(ExtractingDocumentLoader.java:190)
>        ... 22 more
> Caused by: java.lang.NullPointerException
>        at org.pdfbox.pdmodel.PDPageNode.getAllKids(PDPageNode.java:194)
>        at org.pdfbox.pdmodel.PDPageNode.getAllKids(PDPageNode.java:182)
>        at
> org.pdfbox.pdmodel.PDDocumentCatalog.getAllPages(PDDocumentCatalog.java:226)
>        at
> org.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:216)
>        at org.pdfbox.util.PDFTextStripper.getText(PDFTextStripper.java:149)
>        at org.apache.tika.parser.pdf.PDF2XHTML.process(PDF2XHTML.java:53)
>        at org.apache.tika.parser.pdf.PDFParser.parse(PDFParser.java:51)
>        at
> org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:119)
>        ... 24 more
> </pre>
> <p>RequestURI=/solr/lhcpdf/update/extract</p><p><i><small><a
href="
> http://jetty.mortbay.org/">Powered by Jetty://</a></small></i></p><br/>
> <br/>
> ***************************************
>
>
> -----Original Message-----
> From: Jan Høydahl / Cominvent [mailto:jan.asf@cominvent.com]
> Sent: Wednesday, August 25, 2010 4:34 PM
> To: solr-user@lucene.apache.org
> Subject: Re: how to deal with virtual collection in solr?
>
> > 1. Currently we use Verity and have more than 20 collections, each
> collection has a index for public items and a index for private items. So
> there are virtual collections which point to each collection and a virtual
> collection which points to all. For example, we have AA and BB collections.
> >
> > AA virtual collection --> (AA index for public items and AA index for
> private items).
> > BB virtual collection --> (BB index for public items and BB index for
> private items).
> > All virtual collection --> (AA index for public items and AA index for
> private items, BB index for public items and BB index for private items).
> >
> > Would you please tell me what I should do for this if I use Solr?
>
> There are multiple ways to solve this, depending on the nature of your
> collections. If they have somewhat different schemas, a natural choice would
> be to make multiple cores: AA-private, AA-public, BB-private, BB-public. Now
> you can query them individually or in combinations through the shards
> parameter. From next Solr version you can use virtual collections for the
> shard parameter, e.g. &shards=AA,BB etc. (See
> http://wiki.apache.org/solr/SolrCloud#Distributed_Requests)
>
> If all your content is (roughly) the same kind of data, you could also
> solve your virtual collection issue through a "collection" field in your
> schema, and simply select collection through filters: &fq=collection:AA. You
> could even write a Search Component which translates a &collection=
> parameter in the request into the correct filters if you want to hide this
> implementation to the front ends.
>
> > 2. Our project has different kind format files I need index them. For
> example, xml files, pdf files and text files. Is it possible for Solr to
> return a search result from all?
>
> Sure. PDF and text files can be indexed through the
> ExtractingRequestHandler. XML can be indexed from XMLUpdateHandler or
> DataImportHandler. Solr uses Apache Tika internally to extract text from
> PDFs and other rich document formats.
>
> >
> > 3. I got a error when I index pdf files which are version 1.5 or 1.6.
> Would you please tell me if there is a patch to fix it?
>
> How did you try to index these PDFs? What version of Solr are you using?
> Exactly what error message did you get?
>
> --
> Jan Høydahl, search solution architect
> Cominvent AS - www.cominvent.com
> Training in Europe - www.solrtraining.com
>
>

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