Multiple asm jars are being included in Fluo distribution

[mikewalch]

Fluo dependencies hadoop-yarn-client and twill-core are dependent on different version versions of asm (3.1 and 5.0.2 respectively). When both are included in the Fluo distribution tarball, the exception below can prevent Fluo from starting (during fluo yarn start) if jars are loaded in the wrong order (the one below occurred while running on Mac OS X):

Exception in thread " STARTING" java.lang.IncompatibleClassChangeError: class org.apache.twill.internal.utils.Dependencies$DependencyClassVisitor has interface org.objectweb.asm.ClassVisitor as super class
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    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 org.apache.twill.internal.utils.Dependencies.findClassDependencies(Dependencies.java:102)
    at org.apache.twill.internal.ApplicationBundler.findDependencies(ApplicationBundler.java:179)
    at org.apache.twill.internal.ApplicationBundler.createBundle(ApplicationBundler.java:136)
    at org.apache.twill.internal.ApplicationBundler.createBundle(ApplicationBundler.java:106)
    at org.apache.twill.yarn.YarnTwillPreparer.createAppMasterJar(YarnTwillPreparer.java:368)
    at org.apache.twill.yarn.YarnTwillPreparer.access$200(YarnTwillPreparer.java:106)
    at org.apache.twill.yarn.YarnTwillPreparer$1.call(YarnTwillPreparer.java:263)
    at org.apache.twill.yarn.YarnTwillPreparer$1.call(YarnTwillPreparer.java:253)
    at org.apache.twill.yarn.YarnTwillController.doStartUp(YarnTwillController.java:97)
    at org.apache.twill.internal.AbstractZKServiceController.startUp(AbstractZKServiceController.java:75)
    at org.apache.twill.internal.AbstractExecutionServiceController$ServiceDelegate.startUp(AbstractExecutionServiceController.java:109)
    at com.google.common.util.concurrent.AbstractIdleService$1$1.run(AbstractIdleService.java:43)
    at java.lang.Thread.run(Thread.java:722)

The 3.1 version of asm should be excluded from hadoop-yarn-client in fluo-cluster to prevent this.