[jira] [Created] (TOREE-355) java.lang.IncompatibleClassChangeError: class org.clapper.classutil.asm.ASMEmptyVisitor has interface org.objectweb.asm.ClassVisitor as super class

["Adrien Lavoillotte (JIRA)" <ji...@apache.org>]

Adrien Lavoillotte created TOREE-355:
----------------------------------------

             Summary: java.lang.IncompatibleClassChangeError: class org.clapper.classutil.asm.ASMEmptyVisitor has interface org.objectweb.asm.ClassVisitor as super class
                 Key: TOREE-355
                 URL: https://issues.apache.org/jira/browse/TOREE-355
             Project: TOREE
          Issue Type: Bug
         Environment: Toree 0.2.0.dev1
CDH 5.9's embedded spark-2.0.0-beta2
            Reporter: Adrien Lavoillotte


Using Toree 0.2.0.dev1 with CDH's embedded spark 2 did not cause TOREE-327 for me. Instead, I got this error:

{code:stacktrace}
Exception in thread "main" java.lang.IncompatibleClassChangeError: class org.clapper.classutil.asm.ASMEmptyVisitor has interface org.objectweb.asm.ClassVisitor as super class
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at org.clapper.classutil.asm.ClassFile$.load(ClassFinderImpl.scala:250)
        at org.clapper.classutil.ClassFinder.org$clapper$classutil$ClassFinder$$classData(ClassFinder.scala:427)
        at org.clapper.classutil.ClassFinder$$anonfun$2.apply(ClassFinder.scala:385)
        at org.clapper.classutil.ClassFinder$$anonfun$2.apply(ClassFinder.scala:385)
        at scala.collection.immutable.Stream.map(Stream.scala:418)
        at org.clapper.classutil.ClassFinder.processOpenZip(ClassFinder.scala:385)
        at org.clapper.classutil.ClassFinder.processJar(ClassFinder.scala:340)
        at org.clapper.classutil.ClassFinder.findClassesIn(ClassFinder.scala:329)
        at org.clapper.classutil.ClassFinder.find(ClassFinder.scala:320)
        at org.clapper.classutil.ClassFinder.getClasses(ClassFinder.scala:311)
        at org.apache.toree.plugins.PluginSearcher$$anonfun$1.apply(PluginSearcher.scala:73)
        at org.apache.toree.plugins.PluginSearcher$$anonfun$1.apply(PluginSearcher.scala:73)
        at scala.util.Try$.apply(Try.scala:192)
        at org.apache.toree.plugins.PluginSearcher.loadClassMap(PluginSearcher.scala:73)
        at org.apache.toree.plugins.PluginSearcher.internalClassInfo$lzycompute(PluginSearcher.scala:35)
        at org.apache.toree.plugins.PluginSearcher.internalClassInfo(PluginSearcher.scala:34)
        at org.apache.toree.plugins.PluginSearcher.internal$lzycompute(PluginSearcher.scala:38)
        at org.apache.toree.plugins.PluginSearcher.internal(PluginSearcher.scala:38)
        at org.apache.toree.plugins.PluginManager.internalPlugins$lzycompute(PluginManager.scala:45)
        at org.apache.toree.plugins.PluginManager.internalPlugins(PluginManager.scala:44)
        at org.apache.toree.plugins.PluginManager.initialize(PluginManager.scala:80)
        at org.apache.toree.boot.layer.StandardComponentInitialization$class.initializePlugins(ComponentInitialization.scala:221)
        at org.apache.toree.boot.layer.StandardComponentInitialization$class.initializeComponents(ComponentInitialization.scala:86)
        at org.apache.toree.Main$$anon$1.initializeComponents(Main.scala:35)
        at org.apache.toree.boot.KernelBootstrap.initialize(KernelBootstrap.scala:101)
        at org.apache.toree.Main$.delayedEndpoint$org$apache$toree$Main$1(Main.scala:40)
        at org.apache.toree.Main$delayedInit$body.apply(Main.scala:24)
{code}

Apparently in some much older version of ASM (3), {{ClassVisitor}} was an interface and not an abstract class. Said much older version can be found in some Hadoop libs or older Spark libs, and ends up in the classpath with CDH's spark 2.

The simplest solution is to shadow ASM, e.g. using JarJAr Links. The following produces an assembly jar that does not have this issue:

{code:bash}
echo 'rule org.objectweb.asm.** org.apache.toree.shadow.@0' >relocate.rules
java -jar jarjar-1.4.jar process relocate.rules toree.jar toree-relocated.jar
{code}

ASM is a dependency of ClassUtil, for which [an issue on this is currently open|https://github.com/bmc/classutil/issues/19], but the author says he may not want to shadow ASM, so I thought maybe you guy would want to.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)