java.lang.NoClassDefFoundError: scala/collection/GenTraversableOnce$class

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

,
Expert tip

A few things cause this exception:
1) Check if you have all jars and if they're in the correct path.
2) Your classpath might be broken, you can define it in the command line with java -cp yourClassPath or at your IDE if you're using one.

,

you can change your scala version to 2.11.11

Solutions on the web

via Stack Overflow by user2782405
, 1 year ago
via DataStax JIRA by Big Bansal, 11 months ago
scala/collection/GenTraversableOnce$class
java.lang.NoClassDefFoundError: scala/collection/GenTraversableOnce$class
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at com.datastax.spark.connector.util.CountingIterator.(CountingIterator.scala:4)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:319)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:283)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
at org.apache.spark.scheduler.Task.run(Task.scala:85)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

Users with the same issue

3 times, 6 months ago
Samebug visitor profile picture
Unknown user
Once, 1 year ago
Samebug visitor profile picture
Unknown user
Once, 1 year ago
Samebug visitor profile picture
Unknown user
3 times, 1 year ago
Samebug visitor profile picture
Unknown user
Once, 1 year ago
2503 more bugmates

Know the solutions? Share your knowledge to help other developers to debug faster.