Could not initialize class co.elastic.apm.mule4.agent.ApmHandler

[GoBenGoh]

I've managed to get a build success when installing the agent and my mule app is working correctly but I get this error. Is there something wrong with my dependencies?

[GoBenGoh]

Full line:
INFO 2021-11-29 14:37:55,847 [[MuleRuntime].uber.03: [diy1-1].usernameFlow.CPU_LITE @6ba55b6f] [processor: usernameFlow/processors/3; event: f9b8dca0-50b4-11ec-a5d1-dc1ba166b542] org.mule.runtime.core.internal.context.notification.Policy: NotificationListener co.elastic.apm.mule4.agent.ApmMessageProcessorNotificationListener$$EnhancerByCGLIB$$d5037dd4@3eb86072 was unable to fire notification MessageProcessorNotification{action=message processor post invoke, processor=usernameFlow/processors/3, resourceId=usernameFlow, serverId=DESKTOP-4D106F7..diy1-1, timestamp=1638149875847} due to an exception: java.lang.NoClassDefFoundError: Could not initialize class co.elastic.apm.mule4.agent.ApmHandler.

[michaelhyatt]

@GoBenGoh can you please try without the apm-agent-attach dependency? The agent should include all the needed dependencies. Check out the examples directory for pom.xml file configs. You can also download the jars from the releases, so you don't have to build them yourself.

[GoBenGoh]

apm-agent-attach dependency is required otherwise my app fails to deploy (Cannot load class 'co.elastic.apm.attach.ElasticApmAttacher').
I downloaded the release jar (0.4.0) and ran the command filling out the path to jar and version as per the instructions

[GoBenGoh]

Actually the guy from this thread fixed it: #13

I needed to add this to my pom
<dependency>
<groupId>co.elastic.apm</groupId>
<artifactId>apm-agent-api</artifactId>
<version>1.21.0</version>
</dependency>