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https://issues.apache.org/jira/browse/NUTCH-2518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16422738#comment-16422738
 ] 

ASF GitHub Bot commented on NUTCH-2518:
---------------------------------------

sebastian-nagel commented on a change in pull request #307: NUTCH-2518 Cleaning 
up the file system after a job failure.
URL: https://github.com/apache/nutch/pull/307#discussion_r178583685
 
 

 ##########
 File path: src/java/org/apache/nutch/crawl/Injector.java
 ##########
 @@ -463,19 +463,7 @@ public void inject(Path crawlDb, Path urlDir, boolean 
overwrite,
       }
     } catch (IOException | InterruptedException | ClassNotFoundException e) {
       LOG.error("Injector job failed", e);
-      cleanupAfterFailure(tempCrawlDb, lock, fs);
-      throw e;
-    }
-  }
-
-  public void cleanupAfterFailure(Path tempCrawlDb, Path lock, FileSystem fs)
-      throws IOException {
-    try {
-      if (fs.exists(tempCrawlDb)) {
-        fs.delete(tempCrawlDb, true);
-      }
-      LockUtil.removeLockFile(fs, lock);
-    } catch (IOException e) {
+      CrawlDb.cleanupAfterFailure(tempCrawlDb, lock, fs);
 
 Review comment:
   same as above

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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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