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Posted to dev@nutch.apache.org by "Mengying Wang (JIRA)" <ji...@apache.org> on 2014/10/31 06:57:33 UTC
[jira] [Comment Edited] (NUTCH-1884) Java.lang.NullPointerException
when using the parsechecker and indexchecker
[ https://issues.apache.org/jira/browse/NUTCH-1884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14191369#comment-14191369 ]
Mengying Wang edited comment on NUTCH-1884 at 10/31/14 5:57 AM:
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It turns out that this is not a bug. Actually, /Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/ is not a "real" path. i.e., symbolic links exist in the path. Since Parse objects results are stored by "real" path in the ParseResult which may cause a NPE, when there is no ParseResult available per original path. So just use the original real path as the url, then NPE disappears.
was (Author: angela_wang):
Please make sure /Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/ is a "real" path. i.e., no symbolic links in the path. Because Parse objects results are stored by "real" path in the ParseResult which may cause a NPE, when there is no ParseResult available per original path.
> Java.lang.NullPointerException when using the parsechecker and indexchecker
> ---------------------------------------------------------------------------
>
> Key: NUTCH-1884
> URL: https://issues.apache.org/jira/browse/NUTCH-1884
> Project: Nutch
> Issue Type: Bug
> Components: indexer, parser
> Affects Versions: 1.9
> Environment: Mac OS X 10.9.2
> Apache Maven 2.2.1
> Java version: 1.7.0_51
> Reporter: Mengying Wang
> Priority: Minor
>
> I have downloaded the Nutch source code from github (https://github.com/apache/nutch), applied the patches (NUTCH-1879 and NUTCH-1880), and then reinstalled the Nutch. Now the good news is that all urls contain only 1 slash. But unfortunately, the java.lang.NullPointerException warning/error still exists for both of the parsechecker and indexchecker commands.
> Below is the running log:
> (1) $ ./nutch parsechecker "file:/Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/"
> fetching: file:/Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/
> parsing: file:/Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/
> contentType: text/html
> signature: 17bdb44990391c96bb8d48d1802ff11c
> Couldn't pass score, url file:/Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/ (java.lang.NullPointerException)
> ---------
> Url
> ---------------
> file:/Users/AngelaWang/Documents/programs/oodt/cas-curator-0.6/staging/products/xml/
> ---------
> ParseData
> ---------
> Version: 5
> Status: success(1,0)
> Title: Index of /Users/AngelaWang/Documents/programs/oodt/cas-curator-0.6/staging/products/xml
> Outlinks: 2
> outlink: toUrl: file:/Users/AngelaWang/Documents/programs/oodt/cas-curator-0.6/staging/products/ anchor: ../
> outlink: toUrl: file:/Users/AngelaWang/Documents/programs/oodt/cas-curator-0.6/staging/products/xml/monitor.xml anchor: monitor.xml
> Content Metadata: Content-Length=352 nutch.crawl.score=0.0 Last-Modified=Tue, 14 Oct 2014 20:05:50 GMT Content-Type=text/html
> Parse Metadata: CharEncodingForConversion=windows-1252 OriginalCharEncoding=windows-1252
> (2) $ ./nutch indexchecker "file:/Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/"
> fetching: file:/Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/
> parsing: file:/Users/AngelaWang/Documents/programs/oodt/cas-curator/staging/products/xml/
> contentType: text/html
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.nutch.indexer.IndexingFiltersChecker.run(IndexingFiltersChecker.java:139)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> at org.apache.nutch.indexer.IndexingFiltersChecker.main(IndexingFiltersChecker.java:177)
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