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https://issues.apache.org/jira/browse/NUTCH-2442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16207219#comment-16207219
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Sebastian Nagel commented on NUTCH-2442:
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Actually, it's a couple of jobs based on the new MapReduce API which do not
check the return value of {{job.waitForCompletion(true)}} or call
{{job.isSuccessful()}}. Cf. also the discussion in
[NUTCH-2375|https://issues.apache.org/jira/browse/NUTCH-2375?focusedCommentId=16184721&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16184721].
I'm working on a fix for the existing jobs (Injector, SitemapProcessor,
ReadHostDb, and 3 classes in o.a.nutch.util).
> Injector to stop if job fails to avoid loss of CrawlDb
> ------------------------------------------------------
>
> Key: NUTCH-2442
> URL: https://issues.apache.org/jira/browse/NUTCH-2442
> Project: Nutch
> Issue Type: Bug
> Components: injector
> Affects Versions: 1.13
> Reporter: Sebastian Nagel
> Priority: Critical
> Fix For: 1.14
>
>
> Injector does not check whether the MapReduce job is successful. Even if the
> job fails
> - installs the CrawlDb
> -- move current/ to old/
> -- replace current/ with an empty or potentially incomplete version
> - exits with code 0 so that scripts running the crawl workflow cannot detect
> the failure -- if Injector is run a second time the CrawlDb is lost (both
> current/ and old/ are empty or corrupted)
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