Jolokia 1.3.3 no longer work with Java 6

[seboudry]

Hi !

I'm stuck with Java 6 on a legacy app and notice that new version 1.3.3 of Jolokia doesn't work on it.
It seems that a new dependency required a Java 7 class : java.lang.ReflectiveOperationException.
It appears with WAR and JVM agents.
Jolokia 1.3.2 is OK on Java 6.

I didn't found on the docs the required minimum Java version but for me a minor update don't have to force an upgrade of Java.

Here the full stacktrace :

 Exception in thread "main" java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:325)
    at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338)
Caused by: java.lang.NoClassDefFoundError: java/lang/ReflectiveOperationException
    at org.jolokia.jvmagent.handler.JolokiaHttpHandler.start(JolokiaHttpHandler.java:105)
    at org.jolokia.jvmagent.handler.JolokiaHttpHandler.start(JolokiaHttpHandler.java:132)
    at org.jolokia.jvmagent.JolokiaServer.start(JolokiaServer.java:111)
    at org.jolokia.jvmagent.JvmAgent.startAgent(JvmAgent.java:89)
    at org.jolokia.jvmagent.JvmAgent.premain(JvmAgent.java:67)
    ... 6 more
Caused by: java.lang.ClassNotFoundException: java.lang.ReflectiveOperationException
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 11 more

BTW, thanks for the job. Jolokia works like a charm !

[rhuss]

Sorry, seems that a Java 7 only class slipped in.

Maybe a hint to drop Java 6 support sometimes soon ;-) (Just kidding, trying to support even dinosaur Java versions as long as possible and as long as it make sense).

will be fixed for the next version.

[seboudry]

Thanks for the prio1 for next version.
Yeah, that's for some big legacy project, so no Java 7 until axe and hammer handiwork ;-)

[rhuss]

@Secathor just pushed a 1.3.4-SNAPSHOT with the corresponding fix.

Could you please try it whether it works for you ?

[seboudry]

Hi !
Version 1.3.4-SNAPSHOT is OK on java 6 runtime. Thanks

PS: snapshot versions are not accessible from maven central, I've to built it locally.

[amitjain3]

Hi,
Could you please help me with integration of jolokia agent with weblogic.
I am not able to understand why it works in weblogic when running in production_mode false but as soon as production_mode is set to true i start to get classnotfound "Caused by: java.lang.ClassNotFoundException: java.lang.ReflectiveOperationException"

[rhuss]

@amitjain3 thats because of an error introduced in 1.3.3 which relied on Java 7. This has been fixed in 1.3.4-SNAPSHOT. I will release a 1.3.4 very soon now, just waiting on some final feedbacks for a PR.

[amitjain3]

@rhuss thanks. one question still which i am not able to understand is how it works fine without any error in weblogic when production_mode set to false. Does it try to use ReflectiveOperationException class on conditional basis in logic.

[rhuss]

Maybe it uses a different JVM under the hood ? Sorry, I have really no exepriences with Weblogin in this respect. In the working case you could have a look at the java.lang:type=Runtime MBean and then check the systemProperties attribute to get the Java version your server is running with.

Also you could try 1.3.2 which doesn't have this issue.

[amitjain3]

@rhuss I tried using old version

http://search.maven.org/remotecontent?filepath=org/jolokia/jolokia-agent-jvm/2.0.0-M1/jolokia-agent-jvm-2.0.0-M1-agent.jar

but this is also giving below error in jdk1.6 , could you please suggest what I am doing wrong as it looks like it is trying to refer jdk1.7 class.

No access restrictor found at classpath:/jolokia-access.xml, access to all MBeans is allowed
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:325)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338)
Caused by: java.lang.NoClassDefFoundError: java/nio/charset/StandardCharsets
at org.jolokia.service.notif.sse.SseNotificationBackend.(SseNotificationBackend.java:27)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.jolokia.server.core.util.ClassUtil.classForName(ClassUtil.java:64)
at org.jolokia.server.core.util.ClassUtil.classForName(ClassUtil.java:43)
at org.jolokia.server.core.util.LocalServiceFactory.createOrRemoveService(LocalServiceFactory.java:162)
at org.jolokia.server.core.util.LocalServiceFactory.readServiceDefinitionFromUrl(LocalServiceFactory.java:126)
at org.jolokia.server.core.util.LocalServiceFactory.readServiceDefinitions(LocalServiceFactory.java:110)
at org.jolokia.server.core.util.LocalServiceFactory.createServices(LocalServiceFactory.java:72)
at org.jolokia.server.core.util.LocalServiceFactory.createServices(LocalServiceFactory.java:101)
at org.jolokia.server.core.service.impl.ClasspathServiceCreator.getServices(ClasspathServiceCreator.java:32)
at org.jolokia.server.core.service.impl.JolokiaServiceManagerImpl.addServices(JolokiaServiceManagerImpl.java:157)
at org.jolokia.jvmagent.JolokiaServer.init(JolokiaServer.java:232)
at org.jolokia.jvmagent.JolokiaServer.init(JolokiaServer.java:194)
at org.jolokia.jvmagent.JolokiaServer.(JolokiaServer.java:87)
at org.jolokia.jvmagent.JvmAgent.startAgent(JvmAgent.java:91)
at org.jolokia.jvmagent.JvmAgent.premain(JvmAgent.java:71)
... 6 more
Caused by: java.lang.ClassNotFoundException: java.nio.charset.StandardCharsets
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 23 more
FATAL ERROR in native method: processing of -javaagent failed

[rhuss]

Could you please try 1.3.2 ?

Jolokia 2.0.0 wont work with Java 1.6 anymore (intentionally)

[seboudry]

Hi @amitjain3 !
I'm using Jolokia 1.3.2 on Java 6 and everything is OK ;)

[amitjain3]

Sorry my bad, downloaded wrong jar from section.

"I would be more than happy if you would try out the JAR and WAR agent which are supposed to be drop in replacements for Jolokia 1.3.2."

is this correct jar to download

https://jar-download.com/explore-java-source-code.php?a=jolokia-jsr160&g=org.jolokia&v=1.3.2&downloadable=1

Thanks a lot.
Thanks and Regards,
 
Amit Jain   

-----Roland Huß notifications@github.com wrote: -----
To: rhuss/jolokia jolokia@noreply.github.com
From: Roland Huß notifications@github.com
Date: 07/22/2016 05:11PM
Cc: Amit Jain j.amit@intellectdesign.com, Mention mention@noreply.github.com
Subject: Re: [rhuss/jolokia] Jolokia 1.3.3 no longer work with Java 6 (#249)

Could you please try 1.3.2 ?

Jolokia 2.0.0 wont work with Java 1.6 anymore (intentionally)

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[rhuss]

Take this for the JVM agent http://repo1.maven.org/maven2/org/jolokia/jolokia-jvm/1.3.2/jolokia-jvm-1.3.2-agent.jar and this for the WAR agent http://repo1.maven.org/maven2/org/jolokia/jolokia-war/1.3.2/jolokia-war-1.3.2.war

[amitjain3]

Thanks a lot @rhuss working fine now.