[jira] [Created] (COMPRESS-627) Pack200 by apache compress cause archive.3E error if it’s not on system ClassLoader.

["anatawa12 (Jira)" <ji...@apache.org>]

anatawa12 created COMPRESS-627:
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             Summary: Pack200 by apache compress cause archive.3E error if it’s not on system ClassLoader.
                 Key: COMPRESS-627
                 URL: https://issues.apache.org/jira/browse/COMPRESS-627
             Project: Commons Compress
          Issue Type: Bug
    Affects Versions: 1.21
         Environment: {code}
anatawa12@anatawa12-book:~/commons-compress-pack200-test $ uname -v
Darwin Kernel Version 21.6.0: Mon Aug 22 20:19:52 PDT 2022; root:xnu-8020.140.49~2/RELEASE_ARM64_T6000
anatawa12@anatawa12-book:~/commons-compress-pack200-test $ java -version
openjdk version "1.8.0_332"
OpenJDK Runtime Environment (Zulu 8.62.0.19-CA-macos-aarch64) (build 1.8.0_332-b09)
OpenJDK 64-Bit Server VM (Zulu 8.62.0.19-CA-macos-aarch64) (build 25.332-b09, mixed mode)
{code}
            Reporter: anatawa12
         Attachments: Main-1.java

{code:java}
import org.apache.commons.compress.java.util.jar.Pack200;
import java.lang.reflect.Method;
import java.net.URLClassLoader;
import java.net.URL;
import java.io.File;

class Main {
  public static void main(String[] args) throws Throwable {
    URLClassLoader ucl = new URLClassLoader(new URL[] {
      new File(".").toURI().toURL(),
      new File("commons-compress-1.21.jar").toURI().toURL(),
    }, null);

    System.out.println("=== Unpacker ===");
    Method method;
    try {
      method = ucl.loadClass("InClassLoaderClass").getDeclaredMethod("unpacker");
      method.setAccessible(true);
      method.invoke(null);
    } catch (Throwable t) {
      t.printStackTrace();
    }

    System.out.println("=== Packer ===");
    try {
      method = ucl.loadClass("InClassLoaderClass").getDeclaredMethod("packer");
      method.setAccessible(true);
      method.invoke(null);
    } catch (Throwable t) {
      t.printStackTrace();
    }
  }
}

class InClassLoaderClass {
  public static void unpacker() {
    Pack200.newUnpacker();
  }
  public static void packer() {
    Pack200.newPacker();
  }
}
{code}
execute this code (same as attached {{Main.java}}) with {{ClassLoaderClass.class}} (compiled code of this file) and {{commons-compress-1.21.jar}} is on working directory will cause the following error:
{code:java}
anatawa12@anatawa12-book:~/commons-compress-pack200-test $ javac -cp commons-compress-1.21.jar Main.java && java Main
=== Unpacker ===
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 Main.main(Main.java:19)
Caused by: java.lang.Error: archive.3E
	at org.apache.commons.compress.java.util.jar.Pack200$2.run(Pack200.java:100)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.apache.commons.compress.java.util.jar.Pack200.newUnpacker(Pack200.java:91)
	at InClassLoaderClass.unpacker(Main.java:37)
	... 5 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.compress.harmony.unpack200.Pack200UnpackerAdapter
	at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
	at org.apache.commons.compress.java.util.jar.Pack200$2.run(Pack200.java:98)
	... 8 more
=== Packer ===
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 Main.main(Main.java:28)
Caused by: java.lang.Error: archive.3E
	at org.apache.commons.compress.java.util.jar.Pack200$1.run(Pack200.java:72)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.apache.commons.compress.java.util.jar.Pack200.newPacker(Pack200.java:61)
	at InClassLoaderClass.packer(Main.java:40)
	... 5 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.compress.harmony.pack200.Pack200PackerAdapter
	at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
	at org.apache.commons.compress.java.util.jar.Pack200$1.run(Pack200.java:70)
	... 8 more
{code}

In {{src/main/java/org/apache/commons/compress/java/util/jar/Pack200.java}}, {{Packer}}/{{Unpacker}} implementaion is loaded from {{ClassLoader.getSystemClassLoader()}}.
However, Apache commons compress may be loaded from other class loaders in many environments (e.g. Gradle).
 



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