Re: NPE in StrutsUploadedFile

Hii Tamás,

Could you please attach your action class, so all of us in here can
see the details.

Thank you

On Tue, Apr 29, 2025 at 7:00 PM Tamás Barta <[email protected]> wrote:
>
> Hi!
>
> We use Struts 6.7.4 and today we got the following exception in our
> production system. I don't know how it is possible or how to reproduce it
> or how to avoid it. Do you have any ideas? Of course it was a POST with
> file upload.
>
> java.lang.NullPointerException: Cannot invoke "java.io.File.length()"
> because "this.file" is null
>         at
> deployment.deployment.ear//org.apache.struts2.dispatcher.multipart.StrutsUploadedFile.length(StrutsUploadedFile.java:52)
>         at
> deployment.deployment.ear//org.apache.struts2.interceptor.AbstractFileUploadInterceptor.acceptFile(AbstractFileUploadInterceptor.java:133)
>         at
> deployment.deployment.ear//org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:232)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:104)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:169)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257)
>         at
> deployment.deployment.ear//org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:154)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:199)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303)
>         at
> deployment.deployment.ear//com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257)
>         ...
>
> Thanks, Tamás