Im getting a strange error when im compiling my code on a server and downloading it and trying to run it on my computer.
Im basically compiling some java files on an EC2 instance, then loading them into a storage for later use.
When i download the files onto my computer and try to run them i am getting the following errors:
Exception in thread "main" java.lang.ClassFormatError: Incompatible magic value
4022320623 in class file HelloWorldPackage/HelloWorldClass
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:787)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:447)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:476)
I am compiling the files using the following method:
public void compileProject()
{
String command = "javac ";
for(String s: this.getPackages())
{
File[] files = new File("/home/benuni/CompileFiles/" + project + "/src/" + s).listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
return name.endsWith(".java");
}
});
for(File f: files)
{
command = command + f.getAbsolutePath() + " ";
}
}
try {
System.out.println("command: '"+ command +"'");
Process pro = Runtime.getRuntime().exec(command);
printLines(" stderr:", pro.getErrorStream());
pro.waitFor();
this.moveClassFiles();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
and am uploading the files with this method:
public void uploadBin()
{
for(String s: this.getPackages())
{
File[] filesInPackage = new File("/home/benuni/CompileFiles/"+this.project+"/bin/"+s).listFiles();
for(File f: filesInPackage)
{
String key = this.project+"/"+this.version+"/bin/"+s+"/"+f.getName();
s3.putObject("devcloud",key,f);
}
}
}
does anyone know what i am doing wrong?
The class files are runnable when i compile them on the computer, but when i upload them to the cloud and download them im getting the error?
Thanks,
Ben
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