Adrien Lavoillotte created TOREE-355:
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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.
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