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From Hao Wang <wh.s...@gmail.com>
Subject java.lang.NoClassDefFoundError: org/apache/spark/deploy/worker/Worker
Date Sun, 18 May 2014 05:52:10 GMT
Hi, all

*Spark version: bae07e3 [behind 1] fix different versions of commons-lang
dependency and apache/spark#746 addendum*

I have six worker nodes and four of them have this NoClassDefFoundError when
I use thestart-slaves.sh on my driver node. However, running ./bin/spark-class
org.apache.spark.deploy.worker.Worker spark://MASTER_IP:PORT on the worker
nodes works well.

I compile the /spark directory on driver node and distribute to all the
worker nodes. Paths on different nodes are identical.

Here is the logs from one of four driver nodes.

Spark Command: java -cp
::/home/wanghao/spark/conf:/home/wanghao/spark/assembly/target/scala-2.10/spark-assembly-1.0.0-SNAPSHOT-hadoop2.2.0.jar
-Dspark.akka.logLifecycleEvents=true -Xms512m -Xmx512m
org.apache.spark.deploy.worker.Worker spark://192.168.1.12:7077
--webui-port 8081
========================================

Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/spark/deploy/worker/Worker
Caused by: java.lang.ClassNotFoundException:
org.apache.spark.deploy.worker.Worker
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
Could not find the main class: org.apache.spark.deploy.worker.Worker.
Program will exit.

Here is spark-env.sh

export SPARK_WORKER_MEMORY=1g
export SPARK_MASTER_IP=192.168.1.12
export SPARK_MASTER_PORT=7077
export SPARK_WORKER_CORES=1
export SPARK_WORKER_INSTANCES=2

hosts file:

127.0.0.1       localhost
192.168.1.12    sing12

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

192.168.1.11 sing11
192.168.1.59 sing59

###################
# failed machines
###################

192.168.1.122 host122
192.168.1.123 host123
192.168.1.124 host124
192.168.1.125 host125


Regards,
Wang Hao(王灏)

CloudTeam | School of Software Engineering
Shanghai Jiao Tong University
Address:800 Dongchuan Road, Minhang District, Shanghai, 200240
Email:wh.sjtu@gmail.com

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