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https://issues.apache.org/jira/browse/WW-4362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14038561#comment-14038561
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Cédric Couralet commented on WW-4362:
-------------------------------------
as I understand it, the upload was already done before the execAndWait
BackgroundProcess runs. It is then a matter of finishing the background process
before the upload request gets cleaned (deleting the file).
The process of the file could take a long time, that's why we use the
execAndWait interceptor. We could work around the deletion by copying it first
in another location but that seems bad.
> ExecAndWait Interceptor with FileUploadInterceptor incompatibility
> ------------------------------------------------------------------
>
> Key: WW-4362
> URL: https://issues.apache.org/jira/browse/WW-4362
> Project: Struts 2
> Issue Type: Bug
> Components: Core Interceptors
> Affects Versions: 2.3.16.3
> Reporter: Cédric Couralet
> Labels: fileupload
> Fix For: 2.3.18
>
> Attachments: test-eawfu.zip
>
>
> When using execAndWait interceptor with FileUpload interceptor, the uploaded
> file is removed before processing.
> *Steps to reproduce :*
> On a sample project, add a simple action which expects a file and a
> struts.xml of the form :
> {code:xml}
> <!DOCTYPE struts PUBLIC
> "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
> "http://struts.apache.org/dtds/struts-2.3.dtd ">
> <struts>
> <constant name="struts.enable.DynamicMethodInvocation" value="false" />
> <constant name="struts.devMode" value="true" />
> <constant name="struts.action.extension" value="," />
> <package name="accueil" namespace="/" extends="struts-default">
> <action name="">
> <result name="success">WEB-INF/jsp/accueil.jsp</result>
> </action>
> <action name="accueil">
> <result name="success">WEB-INF/jsp/accueil.jsp</result>
> </action>
> <action name="simple" class="net.micedre.action.SimpleAction">
> <interceptor-ref name="executeAndWaitStack" />
>
> <result name="error">WEB-INF/jsp/accueil.jsp</result>
> <result name="success">WEB-INF/jsp/accueil.jsp</result>
> <result name="wait">WEB-INF/jsp/wait.jsp</result>
> </action>
> </package>
> </struts>
> {code}
> In the case of the attached example, the uploaded file is deleted before any
> treatment by SimpleAction on it.
> This is caused by the StrutsFilter which cleans up the request leading to a
> deletion (in the case of jakarta file-upload) before the
> BackgroundProcessThread created by the execAndWait interceptor runs (or
> during).
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