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From "Sebastian Nagel (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (NUTCH-1883) bin/crawl: use function to run bin/nutch and check exit value
Date Sun, 09 Nov 2014 16:04:34 GMT

     [ https://issues.apache.org/jira/browse/NUTCH-1883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sebastian Nagel reopened NUTCH-1883:
------------------------------------
      Assignee: Sebastian Nagel

Hi [~jnioche], you're definitely right. Thanks! "Patch for the patch":
* show a nice message for Generator:
{noformat}
...
Generator: 0 records selected for fetching, exiting ...
Generate returned 1 (no new segments created)
Escaping loop: no more URLs to fetch now
{noformat}
* use function to call dedup


> bin/crawl: use function to run bin/nutch and check exit value
> -------------------------------------------------------------
>
>                 Key: NUTCH-1883
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1883
>             Project: Nutch
>          Issue Type: Improvement
>    Affects Versions: 1.9, 2.2.1
>            Reporter: Sebastian Nagel
>            Assignee: Sebastian Nagel
>            Priority: Minor
>             Fix For: 2.3, 1.10
>
>         Attachments: NUTCH-1883-2x-v1.patch, NUTCH-1883-trunk-v1.patch
>
>
> In bin/crawl for every Nutch command the exit value is checked explicitly:
> {code}
> "$bin/nutch" ...
> RETCODE=$?
> if [ $RETCODE -ne 0 ] 
> then exit $RETCODE 
> fi
> {code}
> This could be simplified by calling bin/nutch from one function which does the check.
The function could also echo the command, show an error message, etc. The main advantage is
short and clear code. In case a special treatment of exit values is required (cf. NUTCH-1829)
we still could call bin/nutch directly.



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