I am trying to use HotSwpAgent on Windows with JRE 1.8
I am getting this error
Invalid layout of java.lang.Thread at name
Error occurred during initialization of VM
Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class
I solved after updating to JRE 1.8 131
I am using this version jdk-8u144
You can redefine classes inside jars/programs using extraClassPath , look at configuration http://hotswapagent.org/mydoc_configuration.html
I am using Hotswap successfully on my web apps running on Tomcat
but failing to use it on a simple java main class
public class JavaEcho {
public static void main(String[] args) {
String input = "";
while(!"quit".equals(input)) {
System.out.print("Say : ");
Scanner scan= new Scanner(System.in);
input = scan.nextLine();
System.out.println("Echo: " + input);
}
}
}
I have the
hotswap-agent.propeties in the same directory with the following properties:
extraClasspath=compile/JavaEcho.class
autoHotswap=true
when I run the app , and modifiy something and compile again I see something like:
which means that the agent receives the event
but the changes are not applied
am I missing on something here?
java -XXaltjvm=dcevm -javaagent:/home/zakaria1/Downloads/hotswap-agent-1.0.jar -cp . JavaEcho
Am using Spring WebMVC
and add the HotSwap JVM args to Tomcat
and then when you need to reload your project, you can recompile it and redirect the compilation out put to your
webapps/yourapp/WEB-INF/classes
@vikrantch-hk Yes it works wit spring boot, here is a blog post I wrote recently about it: http://www.zakariaamine.com/2018-01-06/using-hotswap-agent-to-reload-code