After upgrading to CDH 6.3.3, one map reduce jar started failing with the below error `enter code here` Error: org.apache.hadoop.hbase.DoNotRetryIOException: org.apache.hadoop.hbase.DoNotRetryIOException: java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/regionserver/UnexpectedStateException at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:469) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304) Caused by: java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/regionserver/UnexpectedStateException at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.toFilter(ProtobufUtil.java:1600) at org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.toScan(ProtobufUtil.java:1154) at org.apache.hadoop.hbase.regionserver.RSRpcServices.newRegionScanner(RSRpcServices.java:2971) at org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RSRpcServices.java:3305) at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:42190) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413) ... 3 more Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.regionserver.UnexpectedStateException at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 11 more 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 org.apache.hadoop.hbase.ipc.RemoteWithExtrasException.instantiateException(RemoteWithExtrasException.java:99) at org.apache.hadoop.hbase.ipc.RemoteWithExtrasException.unwrapRemoteException(RemoteWithExtrasException.java:89) at org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.makeIOExceptionOfException(ProtobufUtil.java:361) at org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.handleRemoteException(ProtobufUtil.java:349) at org.apache.hadoop.hbase.client.ScannerCallable.openScanner(ScannerCallable.java:344) at org.apache.hadoop.hbase.client.ScannerCallable.rpcCall(ScannerCallable.java:242) at org.apache.hadoop.hbase.client.ScannerCallable.rpcCall(ScannerCallable.java:58) at org.apache.hadoop.hbase.client.RegionServerCallable.call(RegionServerCallable.java:127) at org.apache.hadoop.hbase.client.RpcRetryingCallerImpl.callWithoutRetries(RpcRetryingCallerImpl.java:192) at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.call(ScannerCallableWithReplicas.java:387) at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.call(ScannerCallableWithReplicas.java:361) at org.apache.hadoop.hbase.client.RpcRetryingCallerImpl.callWithRetries(RpcRetryingCallerImpl.java:107) at org.apache.hadoop.hbase.client.ResultBoundedCompletionService$QueueingFuture.run(ResultBoundedCompletionService.java:80) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)' During re-compile code with CDH 6.3.3 compatible dependencies I had to change below to //import org.apache.hadoop.hbase.regionserver.UnexpectedStateException; import org.apache.hadoop.hbase.exceptions.UnexpectedStateException; However during the execution the jar is still failing with no class found error I am not sure why run time its pointing to 5.12 lib. I have rebind the maven jar multiple time. Also I checked the class path its pointing to CDH6.3.33 jar. ... View more