StandardMultipartHttpServletRequest.StandardMultipartFile not serializable [SPR-12795]

[spring-projects-issues]

Alex Scroggins opened SPR-12795 and commented

Can StandardMultipartHttpServletRequest$StandardMultipartFile be made to implement Serializable like CommonsMultipartFile does?

I'm getting this error in a project using Spring Framework 4.1.1.RELEASE and Spring Web Flow 2.4.0.RELEASE:
org.springframework.webflow.execution.repository.snapshot.SnapshotCreationException: Could not serialize flow execution

Caused by: java.io.NotSerializableException: org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile

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Affects: 3.2.13, 4.1.1, 4.1.5

Referenced from: commits 474862a, 5ba7b89, 6b9e891

Backported to: 3.2.14