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https://issues.apache.org/jira/browse/NUTCH-897?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Markus Jelsma resolved NUTCH-897.
---------------------------------
Resolution: Fixed
Committed in trunk (rev. 1091389) and 1.3 (rev. 1091390).
> Subcollection requires blacklist element
> ----------------------------------------
>
> Key: NUTCH-897
> URL: https://issues.apache.org/jira/browse/NUTCH-897
> Project: Nutch
> Issue Type: Bug
> Components: indexer
> Affects Versions: 1.2, 1.3, 2.0
> Reporter: Markus Jelsma
> Assignee: Markus Jelsma
> Priority: Trivial
> Fix For: 1.3, 2.0
>
> Attachments: NUTCH-897-1.patch, NUTCH-897.patch
>
>
> This is a very minor issue with in Subcollection.java. It throws an error if
> the (empty) blacklist element was omitted. I think it should either not
> silently fail in case of an omitted blacklist element or throw a decent error
> message that the blacklist element is required. The following exception gets
> thrown if the blacklist element is omitted in a subcollection block:
> 2010-09-06 13:32:30,438 INFO collection.CollectionManager - Instantiating
> CollectionManager
> 2010-09-06 13:32:30,438 INFO collection.CollectionManager - initializing
> CollectionManager
> 2010-09-06 13:32:30,451 INFO collection.CollectionManager - file has1
> elements
>
> 2010-09-06 13:32:30,456 WARN collection.CollectionManager - Error
> occured:java.lang.NullPointerException
>
> 2010-09-06 13:32:30,469 WARN collection.CollectionManager -
> java.lang.NullPointerException
>
> 2010-09-06 13:32:30,470 WARN collection.CollectionManager - at
> org.apache.nutch.collection.Subcollection.initialize(Subcollection.java:173)
>
> 2010-09-06 13:32:30,470 WARN collection.CollectionManager - at
> org.apache.nutch.collection.CollectionManager.parse(CollectionManager.java:98)
>
> 2010-09-06 13:32:30,470 WARN collection.CollectionManager - at
> org.apache.nutch.collection.CollectionManager.init(CollectionManager.java:75)
>
> 2010-09-06 13:32:30,470 WARN collection.CollectionManager - at
> org.apache.nutch.collection.CollectionManager.<init>(CollectionManager.java:56)
>
> 2010-09-06 13:32:30,471 WARN collection.CollectionManager - at
> org.apache.nutch.collection.CollectionManager.getCollectionManager(CollectionManager.java:115)
>
>
> 2010-09-06 13:32:30,471 WARN collection.CollectionManager - at
> org.apache.nutch.indexer.subcollection.SubcollectionIndexingFilter.addSubCollectionField(SubcollectionIndexingFilter.java:65)
>
>
> 2010-09-06 13:32:30,471 WARN collection.CollectionManager - at
> org.apache.nutch.indexer.subcollection.SubcollectionIndexingFilter.filter(SubcollectionIndexingFilter.java:71)
>
>
> 2010-09-06 13:32:30,471 WARN collection.CollectionManager - at
> org.apache.nutch.indexer.IndexingFilters.filter(IndexingFilters.java:109)
>
> 2010-09-06 13:32:30,471 WARN collection.CollectionManager - at
> org.apache.nutch.indexer.IndexerMapReduce.reduce(IndexerMapReduce.java:134)
>
> 2010-09-06 13:32:30,472 WARN collection.CollectionManager - at
> org.apache.nutch.indexer.IndexerMapReduce.reduce(IndexerMapReduce.java:50)
>
> 2010-09-06 13:32:30,472 WARN collection.CollectionManager - at
> org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:463)
>
> 2010-09-06 13:32:30,472 WARN collection.CollectionManager - at
> org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:411)
>
> 2010-09-06 13:32:30,472 WARN collection.CollectionManager - at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:216)
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