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Posted to mapreduce-issues@hadoop.apache.org by "Dzianis Sokal (JIRA)" <ji...@apache.org> on 2014/12/09 13:42:12 UTC

[jira] [Created] (MAPREDUCE-6187) DBInputFormat can't pick driver class from *-job.jar/lib

Dzianis Sokal created MAPREDUCE-6187:
----------------------------------------

             Summary: DBInputFormat can't pick driver class from *-job.jar/lib
                 Key: MAPREDUCE-6187
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6187
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Dzianis Sokal


Assume package structure:
{code}
myprocess-job.jar
 /mypackage/MyProcess.class
 /lib/ojdbc.jar
{code} 

Where:
MyProcess.class sets up DbInputFormat.

If I call:
{code}
hadoop jar myprocess-job.jar mypackage.MyProcess.class 
{code}

I will get ClassNotFoundException when DBConfiguration does 
{code}
Class.forName(conf.get(DBConfiguration.DRIVER_CLASS_PROPERTY))
{code}

The fix may be:
{code}
conf.getClassByName(conf.get(DBConfiguration.DRIVER_CLASS_PROPERTY));
{code}

As suggested by Shixiong Zhu: http://mail-archives.apache.org/mod_mbox/sqoop-user/201304.mbox/%3CCADHSSLM-aE0JsAwJPmwmuEUTWL98_iYsqrYxZn+ft-8X_pNakA@mail.gmail.com%3E



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