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https://issues.apache.org/jira/browse/OOZIE-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14506914#comment-14506914
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Johannes Bauer commented on OOZIE-1873:
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We have the same problem in our project :-)
> Empty property not picked up by Oozie
> -------------------------------------
>
> Key: OOZIE-1873
> URL: https://issues.apache.org/jira/browse/OOZIE-1873
> Project: Oozie
> Issue Type: Bug
> Components: workflow
> Affects Versions: 4.0.0
> Reporter: Jeremy Beard
>
> There are cases where specifying an empty string for a parameter value in an
> Oozie job properties file would be very useful (e.g. the line
> “parametername=”). However, when this is done Oozie ignores the parameter
> completely and then any references to it in the job throws the error:
>
> javax.servlet.jsp.el.ELException: variable [parametername] cannot be resolved
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