Hi All, I need to create an index from a Freebase data dump. So I followed the instructions in the README file in entityhub\indexing\freebase.
First I executed java -jar org.apache.stanbol.entityhub.indexing.freebase-1.0.0-SNAPSHOT.jar init, to generate the folder structure. The folder structure was successfully generated except for the following warnings 16:16:20,530 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'nsogi' valid , namespace 'http://prefix.cc/nsogi:' invalid -> mapping ignored! 16:16:21,279 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'category' valid , namespace ' http://dbpedia.org/resource/Category:' invalid -> mapping ignored! 16:16:21,435 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'chebi' valid , namespace ' http://bio2rdf.org/chebi:' invalid -> mapping ignored! 16:16:21,435 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'hgnc' valid , namespace 'http://bio2rdf.org/hgnc:' invalid -> mapping ignored! 16:16:21,450 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'dbptmpl' valid , namespace ' http://dbpedia.org/resource/Template:' invalid -> mapping ignored! 16:16:21,638 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'pubmed' valid , namespace ' http://bio2rdf.org/pubmed_vocabulary:' invalid -> mapping ignored! 16:16:21,638 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'dbc' valid , namespace ' http://dbpedia.org/resource/Category:' invalid -> mapping ignored! 16:16:21,638 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'dbt' valid , namespace ' http://dbpedia.org/resource/Template:' invalid -> mapping ignored! 16:16:21,638 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'dbrc' valid , namespace ' http://dbpedia.org/resource/Category:' invalid -> mapping ignored! 16:16:21,809 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'call' valid , namespace ' http://webofcode.org/wfn/call:' invalid -> mapping ignored! 16:16:21,809 [main] WARN impl.NamespacePrefixProviderImpl - Invalid Namespace Mapping: prefix 'affymetrix' valid , namespace ' http://bio2rdf.org/affymetrix_vocabulary:' invalid -> mapping ignored! Then I copied the Freebase dump (freebase-rdf-latest.gz) to the indexing/resources/rdfdata folder and the incoming_links.txt file, generated by fbrankings-uri.sh to indexing/resources folder and executed the indexing process. (I used all the default config files) While executing the index process I noticed the following log. 16:38:40,806 [main] INFO core.IndexerFactory - - EntityDataIterable: null 16:38:40,806 [main] INFO core.IndexerFactory - - EntityIterator: org.apache.stanbol.entityhub.indexing.core.source.LineBasedEntityIterator@1880249c 16:38:40,806 [main] INFO core.IndexerFactory - - EntityDataProvider: org.apache.stanbol.entityhub.indexing.source.jenatdb.RdfIndexingSource@4e38a55 16:38:40,806 [main] INFO core.IndexerFactory - - EntityScoreProvider: null Finally it threw a null pointer exception as follows 16:38:40,837 [Thread-3] INFO source.ResourceLoader - ... 1 files imported in 0 seconds 16:38:40,837 [Thread-3] INFO source.ResourceLoader - Loding 0 File ... 16:38:40,837 [Thread-3] INFO source.ResourceLoader - ... 0 files imported in 0 seconds 16:38:42,912 [Thread-0] INFO solryard.SolrYardIndexingDestination - ... create SolrYard 16:38:42,959 [main] INFO impl.IndexerImpl - ... delete existing IndexedEntityId file C:\cygwin64\home\User\code\stanbol_indexing\indexing\destination\indexed-entities-ids.zip 16:38:42,974 [main] INFO impl.IndexerImpl - Initialisation completed 16:38:42,974 [main] INFO impl.IndexerImpl - ... initialisation completed 16:38:42,974 [main] INFO impl.IndexerImpl - start indexing ... 16:38:42,974 [main] INFO impl.IndexerImpl - Indexing started ... Exception in thread "Indexing: Entity Source Reader Deamon" java.lang.NullPointerException at java.lang.StringBuilder.<init>(Unknown Source) at org.apache.stanbol.entityhub.indexing.core.source.LineBasedEntityIterator.parseEntityFormLine(LineBasedEntityIterator.java:435) at org.apache.stanbol.entityhub.indexing.core.source.LineBasedEntityIterator.getNext(LineBasedEntityIterator.java:379) at org.apache.stanbol.entityhub.indexing.core.source.LineBasedEntityIterator.hasNext(LineBasedEntityIterator.java:356) at org.apache.stanbol.entityhub.indexing.core.impl.EntityIdBasedIndexingDaemon.run(EntityIdBasedIndexingDaemon.java:55) at java.lang.Thread.run(Unknown Source) I'm not sure if this happens because I haven't configured an important property in a configuration file. I'm pretty new to Stanbol and any help would be much appreciated. Thanks in advance. -- Regards Amindri Udugala
