Woops I just saw my mistake: should be: 'org.apache.kafka.log4jappender' like you suggested,

not 'org.apache.log4jappender' as I did before. My fault!!!

After doing it, I get this stacktrace: https://paste.fedoraproject.org/paste/O~lyLG4Ly36aHmHlUzshNQ

This lead me to this: https://stackoverflow.com/questions/49330032/wildfly-java-lang-noclassdeffounderror-org-jboss-modules-moduleloader-when-usin (heh I see your comments in there :) )

I noticed that in the Java 8 JVM options for the EAP 7.2.3 image, I see:

-Xbootclasspath/p:/opt/eap/jboss-modules.jar:/opt/[etc]

but when using Java 11, I see:

-Xbootclasspath/a:/opt/eap/modules/system/layers/base/.overlays/layer-base-jboss-eap-7[...]

No jboss-modules.jar specified. I tried to add the jboss-modules.jar in my JAVA_OPTS but that

caused another scarier stacktrace :(

-Xbootclasspath/a:/opt/eapjjboss-modules.jar:/opt/eap/module[etc]

https://paste.fedoraproject.org/paste/JRdOrz15X08C2Uxwz-zcQg

Thanks for your help James!

Sincerely,

Dustin

On Wed, 18 Sep 2019 at 13:52, James Perkins <jperkins@redhat.com> wrote:

I'm not too sure. I've not seen this article before so I'd have to fully read it.

Is there a full stack trace?
On Wed, Sep 18, 2019 at 8:32 AM Dustin Kut Moy Cheung <dcheung@redhat.com> wrote:
Thanks for the suggestion! Unfortunately this didn't seem to help:

15:30:44,918 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([
("subsystem" => "logging"),
("custom-handler" => "kafka")
]): java.lang.IllegalArgumentException: WFLYLOG0019: Failed to load module 'org.apache.log4jappender' for handler 'kafka'
at org.jboss.as.logging@6.0.15.Final-redhat-00001//org.jboss.as.logging.handlers.HandlerOperations$HandlerAddOperationStepHandler.createHandlerConfiguration(HandlerOperations.java:293)

I still don't get why it works on OpenJDK 8 and not OpenJDK 11 :(

Sincerely,
Dustin
On Tue, 17 Sep 2019 at 20:21, James Perkins <jperkins@redhat.com> wrote:
That module defined on custom-handler looks wrong. I think it should likely be org.apache.kafka.log4jappender.
On Mon, Sep 16, 2019 at 3:48 PM Dustin Kut Moy Cheung <dcheung@redhat.com> wrote:
Hi,

I'm following this guide to get logging sent to kafka: https://developer.jboss.org/wiki/SendingWildFlyLogsToKafka

This works on EAP 7.2.3.GA running on JDK 8, but fails to run on JDK 11:

```
15:54:28,819 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([
    ("subsystem" => "logging"),
    ("custom-handler" => "kafka")
]): java.lang.IllegalArgumentException: Failed to load module "org.apache.log4j" for pojo "kafka"
...
```
Do you think this is related to the new module system in JDK 11 and I need to add some extra JVM flags to get it to work?
Thank you for your help!
Sincerely,
Dustin
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James R. Perkins
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James R. Perkins
JBoss by Red Hat