You should try 2.3. I bet you get the same result. I bet we enhanced the plugin 
system to ignore plugins that get NoClassDefFoundError.

Ralph

> On Dec 21, 2021, at 6:41 AM, Remko Popma <remko.po...@gmail.com> wrote:
> 
> Gary,
> 
> No it’s literally that pipe cleaning class, the api and core jar, and a 
> Log4j2.xml with just the console Appender. 
> 
> That should work though without any extra dependencies. 
> 
> Interestingly the same setup does work without errors with 2.12.3 on Java 7. 
> 
> What’s the difference between 2.3.1 and 2.12.3?
> 
> Remko
> 
> 
>> On Dec 21, 2021, at 22:37, Gary Gregory <garydgreg...@gmail.com> wrote:
>> 
>> Remko:
>> 
>> JMS is not built-in the JRE, do you have JMS in your configuration for
>> this test? If you do, then you'd need the JMS API and a provider as
>> dependencies.
>> 
>> Gary
>> 
>>> On Tue, Dec 21, 2021 at 7:37 AM Ralph Goers <ralph.go...@dslextreme.com> 
>>> wrote:
>>> 
>>> Hmmm. This is not what I was expecting. If it didn’t work I would have 
>>> expected bad class version exceptions.
>>> 
>>> Ralph
>>> 
>>>>> On Dec 21, 2021, at 4:28 AM, Remko Popma <remko.po...@gmail.com> wrote:
>>>> 
>>>> -1 it does not work...
>>>> 
>>>> Problem running a simple pipecleaning test on Java 6 with 2.3.1...
>>>> My pipecleaning program is something simple like this
>>>> 
>>>> public class Pipecleaning {
>>>>  public static void main(String[] args) {
>>>>      org.apache.logging.log4j.LogManager.getLogger().info("HELLO
>>>> USER ${sys:user.name}");
>>>> 
>>>> I only have 2 jars in the classpath, log4j-api-2.3.1 and 
>>>> log4j-core-2.3.1.The
>>>> problem is that Log4j configuration fails...
>>>> 
>>>> Exception in thread "main" java.lang.NoClassDefFoundError:
>>>> javax/jms/JMSException
>>>>  at java.lang.Class.getDeclaredMethods0(Native Method)
>>>>  at java.lang.Class.privateGetDeclaredMethods(Class.java:2436)
>>>>  at java.lang.Class.getDeclaredMethods(Class.java:1793)
>>>>  at 
>>>> org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.createBuilder(PluginBuilder.java:154)
>>>>  at 
>>>> org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:120)
>>>>  at 
>>>> org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:781)
>>>> 
>>>> 
>>>>> On Tue, Dec 21, 2021 at 2:18 PM Ralph Goers <ralph.go...@dslextreme.com>
>>>>> wrote:
>>>>> 
>>>>> This is a vote to release Log4j 2.3.1, a security release for Java 6 
>>>>> users.
>>>>> 
>>>>> Please download, test, and cast your votes on the log4j developers list.
>>>>> [] +1, release the artifacts
>>>>> [] -1, don't release because...
>>>>> 
>>>>> The vote will remain open for as short amount as time as required to vet
>>>>> the release. All votes are welcome and we encourage everyone to test the
>>>>> release, but only Logging PMC votes are “officially” counted. As always, 
>>>>> at
>>>>> least 3 +1 votes and more positive than negative votes are required.
>>>>> 
>>>>> Changes in this version include:
>>>>> 
>>>>> 
>>>>> New features:
>>>>> *  LOG4J2-3198:  Pattern layout no longer enables lookups within message
>>>>> text.
>>>>> 
>>>>> Fixed Bugs:
>>>>> *  LOG4J2-3242:  Limit JNDI to the java protocol only. JNDI will remain
>>>>> disabled by default. Rename JNDI enablement property from
>>>>>      'log4j2.enableJndi' to 'log4j2.enableJndiLookup',
>>>>> 'log4j2.enableJndiJms', and 'log4j2.enableJndiContextSelector’.
>>>>> *  LOG4J2-3230:  Fix string substitution recursion.
>>>>> 
>>>>> Tag:
>>>>> a)  for a new copy do "git clone
>>>>> https://github.com/apache/logging-log4j2.git"; and then "git checkout
>>>>> tags/log4j-2.3.1-rc1”  or just "git clone -b log4j-2.3.1-rc1
>>>>> https://github.com/apache/logging-log4j2.git";
>>>>> b) for an existing working copy to “git pull” and then “git checkout
>>>>> tags/log4j-2.12.3-rc1”
>>>>> 
>>>>> Web Site:  https://logging.staged.apache.org/log4j/log4j-2.3.1/index.html
>>>>> 
>>>>> Maven Artifacts:
>>>>> https://repository.apache.org/content/repositories/orgapachelogging-1076
>>>>> 
>>>>> Distribution archives:
>>>>> https://dist.apache.org/repos/dist/dev/logging/log4j/
>>>>> 
>>>>> You may download all the Maven artifacts by executing:
>>>>> wget -e robots=off --cut-dirs=7 -nH -r -p -np --no-check-certificate
>>>>> https://repository.apache.org/content/repositories/orgapachelogging-1076/org/apache/logging/log4j/
>>>>> .
>>> 
>>> 
> 

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