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https://issues.apache.org/jira/browse/NUTCH-2442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16238510#comment-16238510
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Sebastian Nagel commented on NUTCH-2442:
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Yes, that's it essentially, plus making sure that all exceptions are caught.
I've also did some work on it, fixed Injector
([2406c3e|https://github.com/sebastian-nagel/nutch/commit/2406c3e0b7605830321b3a30f81f42a1d197b80a],
but didn't continue with the other classes. Feel free to take over. But I
would prefer to fix this separately from NUTCH-2375: it's better to pick the
lower hanging fruits first. Thanks!
> 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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