[ 
https://issues.apache.org/jira/browse/NUTCH-2552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Sebastian Nagel updated NUTCH-2552:
-----------------------------------
    Description: 
{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.*}}).

  was:
{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 


> 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
>            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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