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From "Andrzej Bialecki (JIRA)" <>
Subject [jira] Closed: (NUTCH-143) Improper error numbers returned on exit
Date Wed, 30 Aug 2006 22:17:23 GMT
     [ ]

Andrzej Bialecki  closed NUTCH-143.

    Resolution: Fixed

Fixed in rev. 438670, with modifications.

> Improper error numbers returned on exit
> ---------------------------------------
>                 Key: NUTCH-143
>                 URL:
>             Project: Nutch
>          Issue Type: Bug
>    Affects Versions: 0.8
>            Reporter: Rod Taylor
>         Attachments: errorhandling.patch
> Nutch does not obey standard command line error numbers which can make it difficult to
script around commands.
> Both of the below should have exited with an error number larger than 0 causing the shell
script to enter into the 'Failed' case.
> bash-3.00$ /opt/nutch/bin/nutch updatedb && echo "==>Success" || echo "==>Failed"
> Usage: <crawldb> <segment>
> ==>Success
> bash-3.00$ /opt/nutch/bin/nutch readdb && echo "==>Success" || echo "==>Failed"
> Usage: CrawlDbReader <crawldb> (-stats | -dump <out_dir> | -url <url>)
>         <crawldb>       directory name where crawldb is located
>         -stats  print overall statistics to System.out
>         -dump <out_dir> dump the whole db to a text file in <out_dir>
>         -url <url>      print information on <url> to System.out
> ==>Success
> Note that the nutch shell script functions as expected:
> bash-3.00$ /opt/nutch/bin/nutch  && echo "==>Success" || echo "==>Failed"
> Usage: nutch COMMAND
> where COMMAND is one of:
>   crawl             one-step crawler for intranets
>   readdb            read / dump crawl db
>   readlinkdb        read / dump link db
>   admin             database administration, including creation
>   inject            inject new urls into the database
>   generate          generate new segments to fetch
>   fetch             fetch a segment's pages
>   parse             parse a segment's pages
>   updatedb          update crawl db from segments after fetching
>   invertlinks       create a linkdb from parsed segments
>   index             run the indexer on parsed segments and linkdb
>   merge             merge several segment indexes
>   dedup             remove duplicates from a set of segment indexes
>   server            run a search server
>   namenode          run the NDFS namenode
>   datanode          run an NDFS datanode
>   ndfs              run an NDFS admin client
>   jobtracker        run the MapReduce job Tracker node
>   tasktracker       run a MapReduce task Tracker node
>   job               manipulate MapReduce jobs
>  or
>   CLASSNAME         run the class named CLASSNAME
> Most commands print help when invoked w/o parameters.
> ==>Failed

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