After having checked out from master/head the following error occurs when attempting to run any test in Intellij
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/util/concurrent/ThreadFactoryBuilder at org.apache.spark.util.Utils$.<init>(Utils.scala:648) There appears to be a related issue/JIRA: https://issues.apache.org/jira/browse/SPARK-3217 But the conditions described do not apply in my case: Did you by any chance do one of the following: - forget to "clean" after pulling that change - mix sbt and mvn built artifacts in the same build - set SPARK_PREPEND_CLASSES For reference here is the full stacktrace: Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/util/concurrent/ThreadFactoryBuilder at org.apache.spark.util.Utils$.<init>(Utils.scala:648) at org.apache.spark.util.Utils$.<clinit>(Utils.scala) at org.apache.spark.SparkContext.<init>(SparkContext.scala:179) at org.apache.spark.SparkContext.<init>(SparkContext.scala:119) at org.apache.spark.SparkContext.<init>(SparkContext.scala:134) at org.apache.spark.api.java.JavaSparkContext.<init>(JavaSparkContext.scala:62) at org.apache.spark.sql.hbase.JavaHBaseSQLContext$.main(JavaHBaseSQLContext.scala:45) at org.apache.spark.sql.hbase.JavaHBaseSQLContext.main(JavaHBaseSQLContext.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134) Caused by: java.lang.ClassNotFoundException: com.google.common.util.concurrent.ThreadFactoryBuilder at java.net.URLClassLoader$1.run(URLClassLoader.java:366) 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) ... 13 more Exception in thread "delete Spark temp dirs" java.lang.NoClassDefFoundError: Could not initialize class org.apache.spark.util.Utils$ at org.apache.spark.util.Utils$$anon$4.run(Utils.scala:173)
