[SAMZA-752] "Hello Samza" Scala issues

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.9.1
• Component/s: hello-samza

Environment

• CentOs 7 64-bit
• apache-maven-3.3.3

• Assignee: Unassigned
• Reporter: Mark S
• Created: 04/Aug/15 20:10
• Updated: 11/Aug/15 22:17

Description

I am currently trying to run the Hello Samza example (http://samza.apache.org/startup/hello-samza/0.9/) and unfortunately when I try to run a Samza job I get the following exception:

Command

deploy/samza/bin/run-job.sh --config-factory=org.apache.samza.config.factories.PropertiesConfigFactory --config-path=file://$PWD/deploy/samza/config/wikipedia-feed.properties 

Exception

... 
Error: A JNI error has occurred, please check your installation and try again 
Exception in thread "main" java.lang.NoClassDefFoundError: scala/Function2 
at java.lang.Class.getDeclaredMethods0(Native Method) 
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) 
at java.lang.Class.privateGetMethodRecursive(Class.java:3048) 
at java.lang.Class.getMethod0(Class.java:3018) 
at java.lang.Class.getMethod(Class.java:1784) 
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544) 
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526) 
Caused by: java.lang.ClassNotFoundException: scala.Function2 
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
... 7 more 

If I edit vim deploy/samza/bin/run-class.sh and manually add the scala-library.jar to the CLASSPATH value, this error disappears, though the Hadoop Application will fail with a similarish exception (http://localhost:8088/).

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: scala/collection/immutable/List
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
	at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
	at java.lang.Class.getMethod0(Class.java:3018)
	at java.lang.Class.getMethod(Class.java:1784)
	at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: scala.collection.immutable.List
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 7 more

The following links might be related:

• https://samza.apache.org/learn/tutorials/0.9/run-in-multi-node-yarn.html
• https://issues.apache.org/jira/browse/SAMZA-456