CODEWITHSUNDEEP
javaspring-bootjvmjavaagents
Amy Reed
Amy Reed

Reputation: 1

"Agent JAR not found or no Agent-Class attribute",but success when invoke quickly after the java process start

Here is the position,when i use java agent to attach a running java project,it failed.It reported "Agent JAR not found or no Agent-Class attribute". I know this is not the reason of my agent because it successed when i quickly restart the java project and attach the agent to the project as soon as possible.But when i attached after the seconds when the java project started,it got "Agent JAR not found or no Agent-Class attribute" error.

agentmain code:

package org.test;
public class test{
    public static void agentmain(String agentArgs, Instrumentation inst) throws IOException, UnmodifiableClassException, IllegalClassFormatException, NoSuchFieldException, IllegalAccessException       {
        Class[] classes = inst.getAllLoadedClasses();
        for (Class aClass : classes) {
            if (aClass.getName().equals(DDDFFEE.editClassName)){
                inst.addTransformer(new DDDFFEE(),true);
                inst.retransformClasses(aClass);
            }
        }
    }
}

MANIFEST.MF

Manifest-Version: 1.0
Agent-Class: org.test.test
Can-Redefine-Classes: true
Can-Retransform-Classes: true

The java project is a spring boot web application,and i don't konw why it became like this.

How to attach the running java process whenever the java project start?

I tried lots of times,and check the environments,the java version is the same,the pid file exists,but it worked only when i attach the java process when it started in 1 second,how to solve this?

Upvotes: 0

Views: 370

Answers (0)

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