Not sure why your code will search Logging class under org/apache/spark,
this should be “org/apache/spark/internal/Logging”, and it changed long
time ago.
On Sun, Oct 16, 2016 at 3:25 AM, Brad Cox <bradj...@gmail.com> wrote:
> I'm experimenting with Spark 2.0.1 for the first time and hitting a
> problem right out of the gate.
>
> My main routine starts with this which I think is the standard idiom.
>
> SparkSession sparkSession = SparkSession
> .builder()
> .master("local")
> .appName("DecisionTreeExample")
> .getOrCreate();
>
> Running this in the eclipse debugger, execution fails in getOrCreate()
> with this exception
>
> Exception in thread "main" java.lang.NoClassDefFoundError:
> org/apache/spark/Logging
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
> 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$1.run(URLClassLoader.java:355)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
> at org.apache.spark.sql.SparkSession.<init>(
> SparkSession.scala:122)
> at org.apache.spark.sql.SparkSession.<init>(SparkSession.scala:77)
> at org.apache.spark.sql.SparkSession$Builder.
> getOrCreate(SparkSession.scala:840)
> at titanic.DecisionTreeExample.main(DecisionTreeExample.java:54)
>
> java.lang.NoClassDefFoundError means a class is not found at run time that
> was present at
> compile time. I've googled everything I can think of and found no
> solutions. Can someone
> help? Thanks!
>
> These are my spark-relevant dependencies:
>
> <dependency>
> <groupId>org.apache.spark</groupId>
> <artifactId>spark-core_2.11</artifactId>
> <version>2.0.1</version>
> </dependency>
> <dependency>
> <groupId>org.apache.spark</groupId>
> <artifactId>spark-mllib_2.11</artifactId>
> <version>2.0.1</version>
> </dependency>
> <dependency>
> <groupId>org.apache.spark</groupId>
> <artifactId>spark-sql_2.11</artifactId>
> <version>2.0.1</version>
> </dependency>
>
>
>
> Dr. Brad J. Cox Cell: 703-594-1883 Skype: dr.brad.cox
>
>
>
>
>
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>
>
