Hello,   I am under Ubuntu 14.04 64bit using cloudera repository for CDH 5. I installed hadoop YARN on 1 node (with MangoDb + Mango-hadoop connector). I try to install Spark using apt but I don't manage to make it work   Is there someone who knows what's happening and can tell me how to fix that ?   sudo apt-get install spark-core spark-master spark-worker spark-history-server spark-python   but got: Setting up spark-master (1.0.0+cdh5.1.3+45-1.cdh5.1.3.p0.10~precise-cdh5.1.3) ...  * Starting Spark master (spark-master): invoke-rc.d: initscript spark-master, action "start" failed. dpkg: error processing package spark-master (--configure):  subprocess installed post-installation script returned error exit status 1 Setting up spark-worker (1.0.0+cdh5.1.3+45-1.cdh5.1.3.p0.10~precise-cdh5.1.3) ...  * Starting Spark worker (spark-worker): invoke-rc.d: initscript spark-worker, action "start" failed. dpkg: error processing package spark-worker (--configure):  subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing:  spark-master  spark-worker E: Sub-process /usr/bin/dpkg returned an error code (1)   /var/log/spark/spark-worker.out contains: Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/impl/StaticLoggerBinder     at org.apache.spark.Logging$class.initializeLogging(Logging.scala:114)     at org.apache.spark.Logging$class.initializeIfNecessary(Logging.scala:106)     at org.apache.spark.Logging$class.log(Logging.scala:45)     at org.apache.spark.util.Utils$.log(Utils.scala:49)     at org.apache.spark.Logging$class.logWarning(Logging.scala:70)     at org.apache.spark.util.Utils$.logWarning(Utils.scala:49)     at org.apache.spark.util.Utils$$anonfun$findLocalIpAddress$1$$anonfun$apply$2.apply(Utils.scala:476)     at org.apache.spark.util.Utils$$anonfun$findLocalIpAddress$1$$anonfun$apply$2.apply(Utils.scala:473)     at scala.collection.Iterator$class.foreach(Iterator.scala:727)     at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)     at org.apache.spark.util.Utils$$anonfun$findLocalIpAddress$1.apply(Utils.scala:473)     at org.apache.spark.util.Utils$$anonfun$findLocalIpAddress$1.apply(Utils.scala:472)     at scala.collection.Iterator$class.foreach(Iterator.scala:727)     at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)     at org.apache.spark.util.Utils$.findLocalIpAddress(Utils.scala:472)     at org.apache.spark.util.Utils$.localIpAddress$lzycompute(Utils.scala:460)     at org.apache.spark.util.Utils$.localIpAddress(Utils.scala:460)     at org.apache.spark.util.Utils$.localIpAddressHostname$lzycompute(Utils.scala:461)     at org.apache.spark.util.Utils$.localIpAddressHostname(Utils.scala:461)     at org.apache.spark.util.Utils$$anonfun$localHostName$1.apply(Utils.scala:508)     at org.apache.spark.util.Utils$$anonfun$localHostName$1.apply(Utils.scala:508)     at scala.Option.getOrElse(Option.scala:120)     at org.apache.spark.util.Utils$.localHostName(Utils.scala:508)     at org.apache.spark.deploy.worker.WorkerArguments.<init>(WorkerArguments.scala:28)     at org.apache.spark.deploy.worker.Worker$.main(Worker.scala:366)     at org.apache.spark.deploy.worker.Worker.main(Worker.scala) Caused by: java.lang.ClassNotFoundException: org.slf4j.impl.StaticLoggerBinder     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)     ... 26 more I tried to install some slf4j or log4j libs to make it work but I don't make it work. I tried also to play with classpath but with no success. ... View more