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https://issues.apache.org/jira/browse/WW-4737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15863427#comment-15863427
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Hudson commented on WW-4737:
----------------------------
SUCCESS: Integrated in Jenkins build Struts-JDK7-master #591 (See
[https://builds.apache.org/job/Struts-JDK7-master/591/])
[WW-4737] preserve nulls instead of converting them to the string 'null'
(carl.antuar: rev 58667e64970c528461cf7c5835f9a253c969f737)
* (edit) core/src/main/java/org/apache/struts2/dispatcher/Parameter.java
[WW-4737] add unit testing for parameters being converted to string
(carl.antuar: rev 26bc9cd64bd9e69f7bf2e1076150806581c355f4)
* (add) core/src/test/java/org/apache/struts2/dispatcher/ParameterTest.java
> Array-of-null parameters are converted to arrays containing "null"
> ------------------------------------------------------------------
>
> Key: WW-4737
> URL: https://issues.apache.org/jira/browse/WW-4737
> Project: Struts 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.5.5, 2.5.8
> Reporter: Mitth'raw'nuruodo
> Fix For: 2.5.next
>
>
> The {{org.apache.struts2.dispatcher.Parameter.Request}} class (added in
> Struts 2.5.3) incorrectly handles arrays containing null; it converts them to
> arrays containing the string "null" (using {{String.valueOf}}).
> This is breaking one of our applications; some pages are OK, but on other
> pages, every non-provided field is populated with "null".
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