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Posted to dev@nutch.apache.org by "Sebastian Nagel (JIRA)" <ji...@apache.org> on 2018/04/21 16:25:00 UTC
[jira] [Resolved] (NUTCH-2552) CrawlDbReader -topN fails
[ https://issues.apache.org/jira/browse/NUTCH-2552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sebastian Nagel resolved NUTCH-2552.
------------------------------------
Resolution: Fixed
Assignee: Sebastian Nagel
> CrawlDbReader -topN fails
> -------------------------
>
> Key: NUTCH-2552
> URL: https://issues.apache.org/jira/browse/NUTCH-2552
> Project: Nutch
> Issue Type: Bug
> Components: crawldb
> Affects Versions: 1.15
> Reporter: Sebastian Nagel
> Assignee: Sebastian Nagel
> Priority: Critical
> Fix For: 1.15
>
>
> {noformat}
> % bin/nutch readdb crawldb -topN 50 crawldb_topn
> CrawlDb topN: starting (topN=50, min=0.0)
> CrawlDb db: crawl/crawldb
> CrawlDb topN: collecting topN scores.
> CrawlDbReader job did not succeed, job status:FAILED, reason: NA
> Exception in thread "main" java.lang.RuntimeException: CrawlDbReader job did not succeed, job status:FAILED, reason: NA
> at org.apache.nutch.crawl.CrawlDbReader.processTopNJob(CrawlDbReader.java:853)
> {noformat}
> The hadoop.log shows the reason
> {noformat}
> 2018-04-09 10:04:16,435 WARN mapred.LocalJobRunner - job_local1653923841_0002
> java.lang.Exception: java.lang.NumberFormatException: null
> at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:462)
> at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:529)
> Caused by: java.lang.NumberFormatException: null
> at java.lang.Integer.parseInt(Integer.java:542)
> at java.lang.Integer.parseInt(Integer.java:615)
> at org.apache.nutch.crawl.CrawlDbReader$CrawlDbTopNReducer.setup(CrawlDbReader.java:370)
> at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:168)
> at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:627)
> {noformat}
> Caused by NUTCH-2375: the property {{mapred.job.reduces}} must be updated by {{mapreduce.job.reduces}}.
> Note: Should check all occurrences of this property and similars ones ({{mapred.job.*}}).
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