hive多条元数据 The query returned more than one instance BUT either unique is set to true or only aggregates are to be returned, so should have returned one result maximum

kylin构建报错，日志如下：

java.lang.RuntimeException: cannot get HiveTableMeta
    at org.apache.kylin.source.hive.HiveTable.<init>(HiveTable.java:50)
    at org.apache.kylin.source.hive.HiveSource.createReadableTable(HiveSource.java:65)
    at org.apache.kylin.source.SourceManager.createReadableTable(SourceManager.java:144)
    at org.apache.kylin.cube.CubeManager$DictionaryAssist.buildSnapshotTable(CubeManager.java:1129)
    at org.apache.kylin.cube.CubeManager.buildSnapshotTable(CubeManager.java:1046)
    at org.apache.kylin.cube.cli.DictionaryGeneratorCLI.processSegment(DictionaryGeneratorCLI.java:90)
    at org.apache.kylin.cube.cli.DictionaryGeneratorCLI.processSegment(DictionaryGeneratorCLI.java:49)
    at org.apache.kylin.engine.mr.steps.CreateDictionaryJob.run(CreateDictionaryJob.java:71)
    at org.apache.kylin.engine.mr.MRUtil.runMRJob(MRUtil.java:92)
    at org.apache.kylin.engine.mr.common.HadoopShellExecutable.doWork(HadoopShellExecutable.java:63)
    at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:162)
    at org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:69)
    at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:162)
    at org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:307)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: MetaException(message:javax.jdo.JDOUserException: The query returned more than one instance BUT either unique is set to true or only aggregates are to be returned, so should have returned one result maximum
    at org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:636)
    at org.datanucleus.api.jdo.JDOQuery.executeInternal(JDOQuery.java:388)
    at org.datanucleus.api.jdo.JDOQuery.execute(JDOQuery.java:238)
    at org.apache.hadoop.hive.metastore.ObjectStore.getMTable(ObjectStore.java:1149)
    at org.apache.hadoop.hive.metastore.ObjectStore.getTable(ObjectStore.java:1000)
    at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:111)
    at com.sun.proxy.$Proxy17.getTable(Unknown Source)
    at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_table_core(HiveMetaStore.java:1743)
    at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_table(HiveMetaStore.java:1698)
    at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:138)
    at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:99)
    at com.sun.proxy.$Proxy19.get_table(Unknown Source)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_table.getResult(ThriftHiveMetastore.java:9869)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_table.getResult(ThriftHiveMetastore.java:9853)
    at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
    at org.apache.hadoop.hive.metastore.TUGIBasedProcessor$1.run(TUGIBasedProcessor.java:110)
    at org.apache.hadoop.hive.metastore.TUGIBasedProcessor$1.run(TUGIBasedProcessor.java:106)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
    at org.apache.hadoop.hive.metastore.TUGIBasedProcessor.process(TUGIBasedProcessor.java:118)
    at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
NestedThrowablesStackTrace:
The query returned more than one instance BUT either unique is set to true or only aggregates are to be returned, so should have returned one result maximum
org.datanucleus.store.query.QueryNotUniqueException: The query returned more than one instance BUT either unique is set to true or only aggregates are to be returned, so should have returned one result maximum
    at org.datanucleus.store.query.Query.executeQuery(Query.java:1879)
    at org.datanucleus.store.query.Query.executeWithArray(Query.java:1733)
    at org.datanucleus.api.jdo.JDOQuery.executeInternal(JDOQuery.java:365)
    at org.datanucleus.api.jdo.JDOQuery.execute(JDOQuery.java:238)
    at org.apache.hadoop.hive.metastore.ObjectStore.getMTable(ObjectStore.java:1149)
    at org.apache.hadoop.hive.metastore.ObjectStore.getTable(ObjectStore.java:1000)
    at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:111)
    at com.sun.proxy.$Proxy17.getTable(Unknown Source)
    at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_table_core(HiveMetaStore.java:1743)
    at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_table(HiveMetaStore.java:1698)
    at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:138)
    at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:99)
    at com.sun.proxy.$Proxy19.get_table(Unknown Source)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_table.getResult(ThriftHiveMetastore.java:9869)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_table.getResult(ThriftHiveMetastore.java:9853)
    at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
    at org.apache.hadoop.hive.metastore.TUGIBasedProcessor$1.run(TUGIBasedProcessor.java:110)
    at org.apache.hadoop.hive.metastore.TUGIBasedProcessor$1.run(TUGIBasedProcessor.java:106)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
    at org.apache.hadoop.hive.metastore.TUGIBasedProcessor.process(TUGIBasedProcessor.java:118)
    at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$get_table_result$get_table_resultStandardScheme.read(ThriftHiveMetastore.java:45060)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$get_table_result$get_table_resultStandardScheme.read(ThriftHiveMetastore.java:45037)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$get_table_result.read(ThriftHiveMetastore.java:44968)
    at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:86)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_get_table(ThriftHiveMetastore.java:1282)
    at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.get_table(ThriftHiveMetastore.java:1268)
    at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getTable(HiveMetaStoreClient.java:1266)
    at org.apache.kylin.source.hive.CLIHiveClient.getHiveTableMeta(CLIHiveClient.java:78)
    at org.apache.kylin.source.hive.HiveTable.<init>(HiveTable.java:48)
    ... 16 more

从日志上看报错：返回了多条记录？

从hive的元数据查看有没有一个表对应多条记录，果真如此，发现kylin的一张表对应2条记录

SELECT DB_ID,TBL_NAME,count(*)  as a FROM TBLS GROUP BY DB_ID,TBL_NAME HAVING(a>1)

 从hive中查看这2张表，发现这2张表均报错

从TBLS表中同一个DB_ID中重复的表记录删除一个（我们删除了TBL_ID较大的那个）

从hive中可以查询出数据，kylin恢复