Have a 2 node cluster, things seem to work, HOWEVER, workflows occasionally (like 70% of the time) fail with the following error:   Failing Oozie Launcher, Main class [org.apache.oozie.action.hadoop.Hive2Main], main() threw exception, org.apache.oozie.action.hadoop.Hive2Main.setYarnTag(Lorg/apache/hadoop/conf/Configuration;)V java.lang.NoSuchMethodError: org.apache.oozie.action.hadoop.Hive2Main.setYarnTag(Lorg/apache/hadoop/conf/Configuration;)V   !!!  I would understand if she was failing consistently, which would mean misconfiguration.  But sometimes it passes, and workflows complete successfully.  However, most of the time she fails with that same error.     Please advise how to troubleshoot  or where to look for more hints/logs that would point out the problem!       Failing Oozie Launcher, Main class [org.apache.oozie.action.hadoop.Hive2Main], main() threw exception, org.apache.oozie.action.hadoop.Hive2Main.setYarnTag(Lorg/apache/hadoop/conf/Configuration;)V java.lang.NoSuchMethodError: org.apache.oozie.action.hadoop.Hive2Main.setYarnTag(Lorg/apache/hadoop/conf/Configuration;)V at org.apache.oozie.action.hadoop.Hive2Main.initActionConf(Hive2Main.java:82) at org.apache.oozie.action.hadoop.Hive2Main.run(Hive2Main.java:109) at org.apache.oozie.action.hadoop.LauncherMain.run(LauncherMain.java:39) at org.apache.oozie.action.hadoop.Hive2Main.main(Hive2Main.java:63) 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 org.apache.oozie.action.hadoop.LauncherMapper.map(LauncherMapper.java:226) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54) at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:459) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1917) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158) Oozie Launcher failed, finishing Hadoop job gracefully   ... View more