一下是部分日志：
21/09/29 21:58:05 WARN DataNucleus.Query: Query for candidates of org.apache.hadoop.hive.metastore.model.MDatabase and subclasses resulted in no possible candidates
Index part #0 for `DBS` already set
org.datanucleus.exceptions.NucleusException: Index part #0 for `DBS` already set
at org.datanucleus.store.rdbms.key.Index.setColumn(Index.java:99)
at org.datanucleus.store.rdbms.table.TableImpl.getExistingIndices(TableImpl.java:1146)
at org.datanucleus.store.rdbms.table.TableImpl.validateIndices(TableImpl.java:566)
at org.datanucleus.store.rdbms.table.TableImpl.validateConstraints(TableImpl.java:387)
at org.datanucleus.store.rdbms.table.ClassTable.validateConstraints(ClassTable.java:3576)
at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.performTablesValidation(RDBMSStoreManager.java:3471)
at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.run(RDBMSStoreManager.java:2896)
at org.datanucleus.store.rdbms.AbstractSchemaTransaction.execute(AbstractSchemaTransaction.java:119)
at org.datanucleus.store.rdbms.RDBMSStoreManager.manageClasses(RDBMSStoreManager.java:1627)
at org.datanucleus.store.rdbms.RDBMSStoreManager.getDatastoreClass(RDBMSStoreManager.java:672)
at org.datanucleus.store.rdbms.query.RDBMSQueryUtils.getStatementForCandidates(RDBMSQueryUtils.java:425)
at org.datanucleus.store.rdbms.query.JDOQLQuery.compileQueryFull(JDOQLQuery.java:865)
at org.datanucleus.store.rdbms.query.JDOQLQuery.compileInternal(JDOQLQuery.java:347)
at org.datanucleus.store.query.Query.executeQuery(Query.java:1816)
at org.datanucleus.store.query.Query.executeWithArray(Query.java:1744)
at org.datanucleus.store.query.Query.execute(Query.java:1726)
at org.datanucleus.api.jdo.JDOQuery.executeInternal(JDOQuery.java:374)
at org.datanucleus.api.jdo.JDOQuery.execute(JDOQuery.java:216)
at org.apache.hadoop.hive.metastore.MetaStoreDirectSql.ensureDbInit(MetaStoreDirectSql.java:181)
at org.apache.hadoop.hive.metastore.MetaStoreDirectSql.<init>(MetaStoreDirectSql.java:144)
at org.apache.hadoop.hive.metastore.ObjectStore.initializeHelper(ObjectStore.java:410)
at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:342)
at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:303)
at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:76)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:136)
at org.apache.hadoop.hive.metastore.RawStoreProxy.<init>(RawStoreProxy.java:58)
at org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStoreForConf(HiveMetaStore.java:628)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMSForConf(HiveMetaStore.java:594)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:588)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:655)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:431)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
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:148)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:107)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:79)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:92)
at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6896)
at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6891)
at org.apache.hadoop.hive.metastore.HiveMetaStore.startMetaStore(HiveMetaStore.java:7149)
at org.apache.hadoop.hive.metastore.HiveMetaStore.main(HiveMetaStore.java:7076)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.RunJar.run(RunJar.java:239)
at org.apache.hadoop.util.RunJar.main(RunJar.java:153)
环境：
hadoop2.8.5
hive2.3.9
jdk1.8.0_301
你是不是重启了两次呀，你先看看有没有这个进程，有的话就先关了在重新启动
ps -ef |grep HiveMetaStore
kill -9 “pid”
pid就是进程号
如果不是进程的原因就再仔细检查自己的配置文件吧