[ 
https://issues.apache.org/jira/browse/MCHECKSTYLE-387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Benjamin Marwell updated MCHECKSTYLE-387:
-----------------------------------------
    Description: 
h2. Current situation

In 3.1.1, the PR [https://github.com/apache/maven-checkstyle-plugin/pull/18] 
added a {{try-catch}}-block to the to-be-removed method call 
{{Checker::setClassLoader}}.

Since users should be encuraged to upgrade and maven-plugin-developers should 
know that this method should be removed some time, a warning is to be issued if 
the method call was successful (i.e. when not entering the catch block).
h2. Caveat and drawbacks
 * Users will have to update their {{checkstyle.xml}} file because of 
incompatible changes introduced in {{8.24}}. 
 * Otherwise the warning might confuse users.
 * Once the method call to {{Checker::setClassLoader}} is removed, 
{{checkstyle}} versions prior to 8.26 (Source: 
[https://checkstyle.org/releasenotes.html#Release_8.26]) cannot be used anymore 
(Source: 
[https://github.com/checkstyle/checkstyle/commit/145160f5e21b80c27dc93a1904fe33b9afd4f212]
 and [https://github.com/checkstyle/checkstyle/issues/3773]). But this issue is 
not about removing this method call any time soon.

h2. Related issues
 * 
[MCHECKSTYLE-381|[https://issues.apache.org/jira/projects/MCHECKSTYLE/issues/MCHECKSTYLE-381]]
 The mentioned previous commit.
 * 
[MCHECKSTYLE-384|[https://issues.apache.org/jira/projects/MCHECKSTYLE/issues/MCHECKSTYLE-384]]:
 Once Checkstyle Plugin updates to checkstyle > 8.24, the default installation 
will break existing installations unless users use this method of downgrading 
their checkstyle version: 
[https://maven.apache.org/plugins/maven-checkstyle-plugin/examples/upgrading-checkstyle.html.]

  was:
h2. Current situation

In 3.1.1, the PR [https://github.com/apache/maven-checkstyle-plugin/pull/18] 
added a {{try-catch}}-block to the to-be-removed method call 
{{Checker::setClassLoader}}.

Since users should be encuraged to upgrade and maven-plugin-developers should 
know that this method should be removed some time, a warning is to be issued if 
the method call was successful (i.e. when not entering the catch block).
h2. Caveat and drawbacks
 * Users will have to update their {{checkstyle.xml}} file because of 
incompatible changes introduced in {{8.24}}. 
 * Otherwise the warning might confuse users.
 * Once the method call to {{Checker::setClassLoader}} is removed, 
{{checkstyle}} versions prior to 8.25 or 8.26 (TBD: look up) cannot be used 
anymore (TBD: verify this claim). But this issue is not about removing this 
method call any time soon.

h2. Related issues
 * 
[MCHECKSTYLE-381|[https://issues.apache.org/jira/projects/MCHECKSTYLE/issues/MCHECKSTYLE-381]]
 The mentioned previous commit.
 * 
[MCHECKSTYLE-384|[https://issues.apache.org/jira/projects/MCHECKSTYLE/issues/MCHECKSTYLE-384]]:
 Once Checkstyle Plugin updates to checkstyle > 8.24, the default installation 
will break existing installations unless users use this method of downgrading 
their checkstyle version: 
[https://maven.apache.org/plugins/maven-checkstyle-plugin/examples/upgrading-checkstyle.html.]


> Deprecate method setUpCheckstyleClassloader in 3.1.2
> ----------------------------------------------------
>
>                 Key: MCHECKSTYLE-387
>                 URL: https://issues.apache.org/jira/browse/MCHECKSTYLE-387
>             Project: Maven Checkstyle Plugin
>          Issue Type: Task
>    Affects Versions: 3.1.1
>            Reporter: Benjamin Marwell
>            Priority: Major
>
> h2. Current situation
> In 3.1.1, the PR [https://github.com/apache/maven-checkstyle-plugin/pull/18] 
> added a {{try-catch}}-block to the to-be-removed method call 
> {{Checker::setClassLoader}}.
> Since users should be encuraged to upgrade and maven-plugin-developers should 
> know that this method should be removed some time, a warning is to be issued 
> if the method call was successful (i.e. when not entering the catch block).
> h2. Caveat and drawbacks
>  * Users will have to update their {{checkstyle.xml}} file because of 
> incompatible changes introduced in {{8.24}}. 
>  * Otherwise the warning might confuse users.
>  * Once the method call to {{Checker::setClassLoader}} is removed, 
> {{checkstyle}} versions prior to 8.26 (Source: 
> [https://checkstyle.org/releasenotes.html#Release_8.26]) cannot be used 
> anymore (Source: 
> [https://github.com/checkstyle/checkstyle/commit/145160f5e21b80c27dc93a1904fe33b9afd4f212]
>  and [https://github.com/checkstyle/checkstyle/issues/3773]). But this issue 
> is not about removing this method call any time soon.
> h2. Related issues
>  * 
> [MCHECKSTYLE-381|[https://issues.apache.org/jira/projects/MCHECKSTYLE/issues/MCHECKSTYLE-381]]
>  The mentioned previous commit.
>  * 
> [MCHECKSTYLE-384|[https://issues.apache.org/jira/projects/MCHECKSTYLE/issues/MCHECKSTYLE-384]]:
>  Once Checkstyle Plugin updates to checkstyle > 8.24, the default 
> installation will break existing installations unless users use this method 
> of downgrading their checkstyle version: 
> [https://maven.apache.org/plugins/maven-checkstyle-plugin/examples/upgrading-checkstyle.html.]



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