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    Attempt to run Spark cluster on Mac OS machine fails if Hadoop is not installed. There should be no real need to install full blown Hadoop installation just to run Spark. Current situation {code} # cd $SPARK_HOME Imin:spark-1.5.1-bin-without-hadoop pranas$ ./sbin/ {code} Output: {code} starting org.apache.spark.deploy.master.Master, logging to /Users/pranas/Apps/spark-1.5.1-bin-without-hadoop/sbin/../logs/spark-pranas-org.apache.spark.deploy.master.Master-1-Imin.local.out failed to launch org.apache.spark.deploy.master.Master: at java.lang.ClassLoader.loadClass( ... 7 more full log in /Users/pranas/Apps/spark-1.5.1-bin-without-hadoop/sbin/../logs/spark-pranas-org.apache.spark.deploy.master.Master-1-Imin.local.out {code} Log: {code} # Options read when launching programs locally with # ./bin/run-example or ./bin/spark-submit Spark Command: /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/bin/java -cp /Users/pranas/Apps/spark-1.5.1-bin-without-hadoop/sbin/../conf/:/Users/pranas/Apps/spark-1.5.1-bin-without-hadoop/lib/spark-assembly-1.5.1-hadoop2.2.0.jar -Xms1g -Xmx1g org.apache.spark.deploy.master.Master --ip Imin.local --port 7077 --webui-port 8080 ======================================== Error: A JNI error has occurred, please check your installation and try again Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/Logger at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods( at java.lang.Class.privateGetMethodRecursive( at java.lang.Class.getMethod0( at java.lang.Class.getMethod( at sun.launcher.LauncherHelper.validateMainClass( at sun.launcher.LauncherHelper.checkAndLoadMain( Caused by: java.lang.ClassNotFoundException: org.slf4j.Logger at at java.lang.ClassLoader.loadClass( at sun.misc.Launcher$AppClassLoader.loadClass( {code} Proposed short term fix: Bundle all required 3rd party libs to the uberjar and/or fix start-up script to include required 3rd party libs. Long term quality improvement proposal: Introduce integration tests to check distribution before releasing.

    Apache's JIRA Issue Tracker | 1 year ago | Pranas Baliuka
    java.lang.NoClassDefFoundError: org/slf4j/Logger
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Root Cause Analysis

  1. java.lang.ClassNotFoundException

  2. Java RT
    2. java.lang.ClassLoader.loadClass(
    3. sun.misc.Launcher$AppClassLoader.loadClass(
    3 frames