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https://issues.apache.org/jira/browse/NUTCH-2518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16421468#comment-16421468
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ASF GitHub Bot commented on NUTCH-2518:
---------------------------------------

Omkar20895 commented on issue #307: NUTCH-2518 Cleaning up the file system 
after a job failure.
URL: https://github.com/apache/nutch/pull/307#issuecomment-377719683
 
 
   I have added a new commit, please feel free to review it and let me know if 
any changes are required. I will squash the commits at the end. 

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> Must check return value of job.waitForCompletion()
> --------------------------------------------------
>
>                 Key: NUTCH-2518
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2518
>             Project: Nutch
>          Issue Type: Bug
>          Components: crawldb, fetcher, generator, hostdb, linkdb
>    Affects Versions: 1.15
>            Reporter: Sebastian Nagel
>            Assignee: Kenneth McFarland
>            Priority: Blocker
>             Fix For: 1.15
>
>
> The return value of job.waitForCompletion() of the new MapReduce API 
> (NUTCH-2375) must always be checked. If it's not true, the job has been 
> failed or killed. Accordingly, the program
> - should not proceed with further jobs/steps
> - must clean-up temporary data, unlock CrawlDB, etc.
> - exit with non-zero exit value, so that scripts running the crawl workflow 
> can handle the failure
> Cf. NUTCH-2076, NUTCH-2442, [NUTCH-2375 PR 
> #221|https://github.com/apache/nutch/pull/221#issuecomment-332941883].



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