title: IllegalAccessError for RequestHedgingRMFailoverProxyProvider while launching Apache Twill Application in hadoop cluster after HDP upgrade
body: <p>I'm trying to launch Apache Twill application from hadoop cluster, the cluster is recently upgraded from HDP 2.2 to HDP 2.5 but I'm getting llegalAccessError for RequestHedgingRMFailoverProxyProvider class . This class is part of org.apache.hadoop.yarn.client package. I'm getting this error in the Application Master. The job status goes directy to 'not running state' right after 'accepted state'.</p>
  
  <pre><code>Exception in thread "Hadoop22YarnAMClient STARTING" Exception in thread "YarnAMClientService STARTING" java.lang.IllegalAccessError: tried to access method org.apache.hadoop.yarn.client.ConfiguredRMFailoverProxyProvider.getProxyInternal()Ljava/lang/Object; from class org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider
  at org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider.init(RequestHedgingRMFailoverProxyProvider.java:75)
  at org.apache.hadoop.yarn.client.RMProxy.createRMFailoverProxyProvider(RMProxy.java:163)
  at org.apache.hadoop.yarn.client.RMProxy.createRMProxy(RMProxy.java:93)
  at org.apache.hadoop.yarn.client.ClientRMProxy.createRMProxy(ClientRMProxy.java:72)
  at org.apache.hadoop.yarn.client.api.impl.AMRMClientImpl.serviceStart(AMRMClientImpl.java:186)
  at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
  at org.apache.twill.internal.yarn.Hadoop21YarnAMClient.startUp(Hadoop21YarnAMClient.java:77)
  at com.google.common.util.concurrent.AbstractIdleService$1$1.run(AbstractIdleService.java:43)
  at java.lang.Thread.run(Thread.java:745)
  com.google.common.util.concurrent.ExecutionError: java.lang.IllegalAccessError: tried to access method org.apache.hadoop.yarn.client.ConfiguredRMFailoverProxyProvider.getProxyInternal()Ljava/lang/Object; from class org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider
  at com.google.common.util.concurrent.Futures.wrapAndThrowUnchecked(Futures.java:1008)
  at com.google.common.util.concurrent.Futures.getUnchecked(Futures.java:1001)
  at com.google.common.util.concurrent.AbstractService.startAndWait(AbstractService.java:220)
  at com.google.common.util.concurrent.AbstractIdleService.startAndWait(AbstractIdleService.java:106)
  at org.apache.twill.internal.appmaster.ApplicationMasterMain$YarnAMClientService.startUp(ApplicationMasterMain.java:221)
  at com.google.common.util.concurrent.AbstractIdleService$1$1.run(AbstractIdleService.java:43)
  at java.lang.Thread.run(Thread.java:745)
  Caused by: java.lang.IllegalAccessError: tried to access method org.apache.hadoop.yarn.client.ConfiguredRMFailoverProxyProvider.getProxyInternal()Ljava/lang/Object; from class org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider
  at org.apache.hadoop.yarn.client.RequestHedgingRMFailoverProxyProvider.init(RequestHedgingRMFailoverProxyProvider.java:75)
  at org.apache.hadoop.yarn.client.RMProxy.createRMFailoverProxyProvider(RMProxy.java:163)
  at org.apache.hadoop.yarn.client.RMProxy.createRMProxy(RMProxy.java:93)
  at org.apache.hadoop.yarn.client.ClientRMProxy.createRMProxy(ClientRMProxy.java:72)
  at org.apache.hadoop.yarn.client.api.impl.AMRMClientImpl.serviceStart(AMRMClientImpl.java:186)
  at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
  at org.apache.twill.internal.yarn.Hadoop21YarnAMClient.startUp(Hadoop21YarnAMClient.java:77)
  ... 2 more
  </code></pre>