java.lang.NoSuchFieldError: UNKNOWN while using jmx_exporter as javaagent

[Jai Bheemsen Rao Dhanwada]

Hello,

I am using jmx_exporter as javaagent and when I build the jar from the latest code, the javaagent fails to comeup with the below exception. Earlier version(probably built a year ago) was working fine. Am I missing something?

Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:386)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:401)
Caused by: java.lang.NoSuchFieldError: UNKNOWN
at io.prometheus.jmx.JmxCollector$Rule.<init>(JmxCollector.java:57)
at io.prometheus.jmx.JmxCollector.loadConfig(JmxCollector.java:214)
at io.prometheus.jmx.JmxCollector.<init>(JmxCollector.java:91)
at io.prometheus.jmx.JavaAgent.premain(JavaAgent.java:29)
... 6 more

[Jai Bheemsen Rao Dhanwada]

I had a older version of jar in the classpath which was conflicting, after removing it's working fine. thanks