https://community.cloudera.com/t5/Support-Questions/hdfs-delegation-token-can-not-be-found-in-cache/m-p/179383#M141629 <P>while running a hive query i am experiencing below error however simple select works but when i execute query with group by clause it is throwing an error :</P><PRE>java.sql.SQLException: Error while processing statement: FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.tez.TezTask. Vertex failed, vertexName=Map 8, vertexId=vertex_1530387194612_0030_4_00, diagnostics=[Vertex vertex_1530387194612_0030_4_00 [Map 8] killed/failed due to:ROOT_INPUT_INIT_FAILURE, Vertex Input: tbtbotabel_db2_orc initializer failed, vertex=vertex_1530387194612_0030_4_00 [Map 8], java.io.IOException: java.util.concurrent.ExecutionException: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.token.SecretManager$InvalidToken): token (HDFS_DELEGATION_TOKEN token 214816 for hive) can't be found in cache at org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getSplits(CombineHiveInputFormat.java:502) at org.apache.tez.mapreduce.hadoop.MRInputHelpers.generateOldSplits(MRInputHelpers.java:446) at org.apache.tez.mapreduce.hadoop.MRInputHelpers.generateInputSplitsToMem(MRInputHelpers.java:300) at org.apache.tez.mapreduce.common.MRInputAMSplitGenerator.initialize(MRInputAMSplitGenerator.java:123) at org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable$1.run(RootInputInitializerManager.java:278) at org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable$1.run(RootInputInitializerManager.java:269) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1866) at org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable.call(RootInputInitializerManager.java:269) at org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable.call(RootInputInitializerManager.java:253) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.util.concurrent.ExecutionException: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.token.SecretManager$InvalidToken): token (HDFS_DELEGATION_TOKEN token 214816 for hive) can't be found in cache at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getSplits(CombineHiveInputFormat.java:490) ... 14 more Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.token.SecretManager$InvalidToken): token (HDFS_DELEGATION_TOKEN token 214816 for hive) can't be found in cache at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1554) at org.apache.hadoop.ipc.Client.call(Client.java:1498) at org.apache.hadoop.ipc.Client.call(Client.java:1398) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:233) at com.sun.proxy.$Proxy13.getListing(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getListing(ClientNamenodeProtocolTranslatorPB.java:620) at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:291) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:203) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:185) at com.sun.proxy.$Proxy14.getListing(Unknown Source) at org.apache.hadoop.hdfs.DFSClient.listPaths(DFSClient.java:2143) at org.apache.hadoop.hdfs.DFSClient.listPaths(DFSClient.java:2126) at org.apache.hadoop.hdfs.DistributedFileSystem.listStatusInternal(DistributedFileSystem.java:919) at org.apache.hadoop.hdfs.DistributedFileSystem.access$600(DistributedFileSystem.java:114) at org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:985) at org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:981) at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81) at org.apache.hadoop.hdfs.DistributedFileSystem.listStatus(DistributedFileSystem.java:981) at org.apache.hadoop.hive.ql.io.AcidUtils.isAcid(AcidUtils.java:459) at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat.shouldSkipCombine(OrcInputFormat.java:179) at </PRE> Fri, 06 Jul 2018 13:08:16 GMT amol_08 2018-07-06T13:08:16Z