https://community.cloudera.com/t5/Support-Questions/HDP-2-6-3-0-spark-python-java-lang-ClassNotFoundException/m-p/207305#M169266 <P>Hi, trying to run simple python script using spark2 and spark-submit in yarn-client mode,</P><P>Getting</P><PRE>Heart beat 2018-03-31 15:38:26 INFO AbstractService:272 - Service org.apache.hadoop.yarn.client.api.impl.YarnClientImpl failed in state STARTED; cause: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider not found java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider not found at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2227) at org.apache.hadoop.yarn.client.RMProxy.createRMFailoverProxyProvider(RMProxy.java:161) at org.apache.hadoop.yarn.client.RMProxy.createRMProxy(RMProxy.java:94) at org.apache.hadoop.yarn.client.ClientRMProxy.createRMProxy(ClientRMProxy.java:72) at org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.serviceStart(YarnClientImpl.java:187) at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193) at org.apache.spark.deploy.yarn.Client.submitApplication(Client.scala:152) at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:57) at org.apache.spark.scheduler.TaskSchedulerImpl.start(TaskSchedulerImpl.scala:164) at org.apache.spark.SparkContext.&lt;init&gt;(SparkContext.scala:500) at org.apache.spark.api.java.JavaSparkContext.&lt;init&gt;(JavaSparkContext.scala:58) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:247) at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357) at py4j.Gateway.invoke(Gateway.java:238) at py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:80) at py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:69) at py4j.GatewayConnection.run(GatewayConnection.java:214) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider not found at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2195) at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2219) ... 21 more Caused by: java.lang.ClassNotFoundException: Class org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider not found at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2101) at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2193) ... 22 more 2018-03-31 15:38:26 ERROR SparkContext:91 - Error initializing SparkContext. java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider not found</PRE><P>What do I do wrong?</P> Sun, 01 Apr 2018 00:09:01 GMT serega_sheypak 2018-04-01T00:09:01Z