[ 
https://issues.apache.org/jira/browse/WW-5632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Lukasz Lenart updated WW-5632:
------------------------------
    Description: 
h3. Background

[WW-5615|https://issues.apache.org/jira/browse/WW-5615] fixed the 
{{NoSuchMethodError}} caused by Apache Commons FileUpload 2.0.0-M5 renaming 
{{setSizeMax}} -> {{setMaxSize}} (and friends), shipped in 7.2.0 via 
[#1584|https://github.com/apache/struts/pull/1584].
That fix addressed the *symptom* for one milestone bump but not the underlying 
*class of failure*.

h3. Problem

Struts depends on _milestone_ ({{-M}}) builds of commons-fileupload2, which 
break binary compatibility between milestones. Three gaps remain on {{main}}:

* The renamed setters ({{setMaxSize}}, {{setMaxFileCount}}, {{setMaxFileSize}}) 
live in
  *{{commons-fileupload2-core}}* ({{AbstractFileUpload}}), but only  
{{commons-fileupload2-jakarta-servlet6}} is pinned in {{dependencyManagement}} 
— {{-core}} is unmanaged, so a transitive dependency can pull a mismatched 
{{-core}} milestone and reproduce the {{NoSuchMethodError}}.
* The {{maven-enforcer-plugin}} {{dependencyConvergence}} rule sits only in  
{{<pluginManagement>}} and is never bound to an active {{<plugins>}} section, 
so it  never runs — the build cannot catch a fileupload version skew.
* Downstream consumer runtimes get an opaque, deep-stack {{NoSuchMethodError}} 
with no  actionable guidance.

h3. Proposed changes

* *(A1)* Introduce a single {{commons-fileupload2.version}} property and manage 
*both*  {{commons-fileupload2-core}} and 
{{commons-fileupload2-jakarta-servlet6}} at that version  in 
{{parent/pom.xml}}, forcing a matched {{-core}} version across the reactor.
* *(A2)* Activate {{maven-enforcer-plugin}} with a fileupload-scoped 
{{bannedDependencies}}  rule that fails the build on any commons-fileupload2 
version other than the pinned one  (narrow scope, near-zero blast radius).
* *(B)* Add a once-per-JVM reflective guard in {{AbstractMultiPartRequest}} 
that throws a  clear {{StrutsException}} reporting the {{-core}} vs 
{{-jakarta-servlet6}} version skew  instead of an opaque {{NoSuchMethodError}}.

  was:
h3. Background

[WW-5615|https://issues.apache.org/jira/browse/WW-5615] fixed the 
{{NoSuchMethodError}}
caused by Apache Commons FileUpload 2.0.0-M5 renaming {{setSizeMax}} -> 
{{setMaxSize}}
(and friends), shipped in 7.2.0 via 
[#1584|https://github.com/apache/struts/pull/1584].
That fix addressed the *symptom* for one milestone bump but not the underlying 
*class of
failure*.

h3. Problem

Struts depends on _milestone_ ({{-M}}) builds of commons-fileupload2, which 
break binary
compatibility between milestones. Three gaps remain on {{main}}:

* The renamed setters ({{setMaxSize}}, {{setMaxFileCount}}, {{setMaxFileSize}}) 
live in
  *{{commons-fileupload2-core}}* ({{AbstractFileUpload}}), but only
  {{commons-fileupload2-jakarta-servlet6}} is pinned in 
{{dependencyManagement}} —
  {{-core}} is unmanaged, so a transitive dependency can pull a mismatched 
{{-core}}
  milestone and reproduce the {{NoSuchMethodError}}.
* The {{maven-enforcer-plugin}} {{dependencyConvergence}} rule sits only in
  {{<pluginManagement>}} and is never bound to an active {{<plugins>}} section, 
so it
  never runs — the build cannot catch a fileupload version skew.
* Downstream consumer runtimes get an opaque, deep-stack {{NoSuchMethodError}} 
with no
  actionable guidance.

h3. Proposed changes

* *(A1)* Introduce a single {{commons-fileupload2.version}} property and manage 
*both*
  {{commons-fileupload2-core}} and {{commons-fileupload2-jakarta-servlet6}} at 
that version
  in {{parent/pom.xml}}, forcing a matched {{-core}} version across the reactor.
* *(A2)* Activate {{maven-enforcer-plugin}} with a fileupload-scoped 
{{bannedDependencies}}
  rule that fails the build on any commons-fileupload2 version other than the 
pinned one
  (narrow scope, near-zero blast radius).
* *(B)* Add a once-per-JVM reflective guard in {{AbstractMultiPartRequest}} 
that throws a
  clear {{StrutsException}} reporting the {{-core}} vs {{-jakarta-servlet6}} 
version skew
  instead of an opaque {{NoSuchMethodError}}.


> Harden commons-fileupload2 dependency against milestone binary-incompatibility
> ------------------------------------------------------------------------------
>
>                 Key: WW-5632
>                 URL: https://issues.apache.org/jira/browse/WW-5632
>             Project: Struts 2
>          Issue Type: New Feature
>          Components: Core Interceptors
>            Reporter: Lukasz Lenart
>            Assignee: Lukasz Lenart
>            Priority: Major
>             Fix For: 7.2.0
>
>
> h3. Background
> [WW-5615|https://issues.apache.org/jira/browse/WW-5615] fixed the 
> {{NoSuchMethodError}} caused by Apache Commons FileUpload 2.0.0-M5 renaming 
> {{setSizeMax}} -> {{setMaxSize}} (and friends), shipped in 7.2.0 via 
> [#1584|https://github.com/apache/struts/pull/1584].
> That fix addressed the *symptom* for one milestone bump but not the 
> underlying *class of failure*.
> h3. Problem
> Struts depends on _milestone_ ({{-M}}) builds of commons-fileupload2, which 
> break binary compatibility between milestones. Three gaps remain on {{main}}:
> * The renamed setters ({{setMaxSize}}, {{setMaxFileCount}}, 
> {{setMaxFileSize}}) live in
>   *{{commons-fileupload2-core}}* ({{AbstractFileUpload}}), but only  
> {{commons-fileupload2-jakarta-servlet6}} is pinned in 
> {{dependencyManagement}} — {{-core}} is unmanaged, so a transitive dependency 
> can pull a mismatched {{-core}} milestone and reproduce the 
> {{NoSuchMethodError}}.
> * The {{maven-enforcer-plugin}} {{dependencyConvergence}} rule sits only in  
> {{<pluginManagement>}} and is never bound to an active {{<plugins>}} section, 
> so it  never runs — the build cannot catch a fileupload version skew.
> * Downstream consumer runtimes get an opaque, deep-stack 
> {{NoSuchMethodError}} with no  actionable guidance.
> h3. Proposed changes
> * *(A1)* Introduce a single {{commons-fileupload2.version}} property and 
> manage *both*  {{commons-fileupload2-core}} and 
> {{commons-fileupload2-jakarta-servlet6}} at that version  in 
> {{parent/pom.xml}}, forcing a matched {{-core}} version across the reactor.
> * *(A2)* Activate {{maven-enforcer-plugin}} with a fileupload-scoped 
> {{bannedDependencies}}  rule that fails the build on any commons-fileupload2 
> version other than the pinned one  (narrow scope, near-zero blast radius).
> * *(B)* Add a once-per-JVM reflective guard in {{AbstractMultiPartRequest}} 
> that throws a  clear {{StrutsException}} reporting the {{-core}} vs 
> {{-jakarta-servlet6}} version skew  instead of an opaque 
> {{NoSuchMethodError}}.



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