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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-2442) Injector to stop if job fails to avoid loss of CrawlDb
Date Sat, 04 Nov 2017 20:51:01 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-2442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16239222#comment-16239222
] 

ASF GitHub Bot commented on NUTCH-2442:
---------------------------------------

sebastian-nagel commented on a change in pull request #239: NUTCH-2442 Injector to stop if
job fails to avoid loss of CrawlDb
URL: https://github.com/apache/nutch/pull/239#discussion_r148940951
 
 

 ##########
 File path: src/java/org/apache/nutch/util/ProtocolStatusStatistics.java
 ##########
 @@ -122,8 +122,17 @@ public int run(String[] args) throws Exception {
     job.setNumReduceTasks(numOfReducers);
 
     try {
-      job.waitForCompletion(true);
-    } catch (Exception e) {
+      boolean success = job.waitForCompletion(true);
+      if(!success){
 
 Review comment:
   Please use consistent and uniform formatting.

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> 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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