I have installed Java 6 in an Ubuntu VM and created a simple all that just logs 
Hello, world!.  I had no problem running it in Java 6 with the 2.3.1 api and 
core jars.

Remko, if you want to do a screen share I’d be happy to demo it.

Ralph

> On Dec 21, 2021, at 7:15 AM, Ralph Goers <ralph.go...@dslextreme.com> wrote:
> 
> 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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