哪里网站建设公司比较好,教育培训类网站模板,seo策略,.net电影网站开发启动hive显示什么才是成功 当你成功启动Hive时#xff0c;通常会看到一系列的日志信息输出到控制台#xff0c;这些信息包括了Hive服务初始化的过程以及它与Metastore服务连接的情况等。一旦Hive完成启动并准备就绪#xff0c;你将看到提示符#xff08;如 hive #…启动hive显示什么才是成功 当你成功启动Hive时通常会看到一系列的日志信息输出到控制台这些信息包括了Hive服务初始化的过程以及它与Metastore服务连接的情况等。一旦Hive完成启动并准备就绪你将看到提示符如 hive 表示你可以开始输入命令或查询了。 注意Hive依赖于Hadoop的HDFS和YARN等组件因此首先需要确保Hadoop服务已经成功启动。 报错 hadoopdblab-VirtualBox:~$ start-all.sh This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh Starting namenodes on [localhost] localhost: namenode running as process 3184. Stop it first. localhost: datanode running as process 3339. Stop it first. Starting secondary namenodes [0.0.0.0] 0.0.0.0: secondarynamenode running as process 3537. Stop it first. starting yarn daemons resourcemanager running as process 3712. Stop it first. localhost: nodemanager running as process 3910. Stop it first. hadoopdblab-VirtualBox:~$ ^C hadoopdblab-VirtualBox:~$ hive SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/usr/local/hive/lib/log4j-slf4j-impl-2.4.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/local/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory] Logging initialized using configuration in jar:file:/usr/local/hive/lib/hive-common-2.1.0.jar!/hive-log4j2.properties Async: true Exception in thread main java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:578) at org.apache.hadoop.hive.ql.session.SessionState.beginStart(SessionState.java:518) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:705) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:641) 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:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient at org.apache.hadoop.hive.ql.metadata.Hive.registerAllFunctionsOnce(Hive.java:226) at org.apache.hadoop.hive.ql.metadata.Hive.init(Hive.java:366) at org.apache.hadoop.hive.ql.metadata.Hive.create(Hive.java:310) at org.apache.hadoop.hive.ql.metadata.Hive.getInternal(Hive.java:290) at org.apache.hadoop.hive.ql.metadata.Hive.get(Hive.java:266) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:545) ... 9 more Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1627) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.init(RetryingMetaStoreClient.java:80) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:130) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:101) at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:3317) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3356) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3336) at org.apache.hadoop.hive.ql.metadata.Hive.getAllFunctions(Hive.java:3590) at org.apache.hadoop.hive.ql.metadata.Hive.reloadFunctions(Hive.java:236) at org.apache.hadoop.hive.ql.metadata.Hive.registerAllFunctionsOnce(Hive.java:221) ... 14 more Caused by: java.lang.reflect.InvocationTargetException 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.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1625) ... 23 more Caused by: javax.jdo.JDOFatalDataStoreException: Unable to open a test connection to the given database. JDBC url jdbc:mysql://localhost:2024/hive?createDatabaseIfNotExisttrue, username root. Terminating connection pool (set lazyInit to true if you expect to start your database after your app). Original Exception: ------ com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989) at com.mysql.jdbc.MysqlIO.init(MysqlIO.java:341) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2251) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2284) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083) at com.mysql.jdbc.ConnectionImpl.init(ConnectionImpl.java:806) at com.mysql.jdbc.JDBC4Connection.init(JDBC4Connection.java:47) 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:208) at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:361) at com.jolbox.bonecp.BoneCP.init(BoneCP.java:416) at com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:120) at org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:483) at org.datanucleus.store.rdbms.RDBMSStoreManager.init(RDBMSStoreManager.java:296) 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.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606) at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301) at org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:133) at org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:420) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:821) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:338) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:217) 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 javax.jdo.JDOHelper$16.run(JDOHelper.java:1965) at java.security.AccessController.doPrivileged(Native Method) at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960) at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166) at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:808) at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:701) at org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:424) at org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:453) at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:327) at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:294) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:76) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:136) at org.apache.hadoop.hive.metastore.RawStoreProxy.init(RawStoreProxy.java:58) at org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStore(HiveMetaStore.java:581) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:546) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:612) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:398) at org.apache.hadoop.hive.metastore.RetryingHMSHandler.init(RetryingHMSHandler.java:78) at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:84) at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6396) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.init(HiveMetaStoreClient.java:236) at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.init(SessionHiveMetaStoreClient.java:70) 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.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1625) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.init(RetryingMetaStoreClient.java:80) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:130) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:101) at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:3317) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3356) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3336) at org.apache.hadoop.hive.ql.metadata.Hive.getAllFunctions(Hive.java:3590) at org.apache.hadoop.hive.ql.metadata.Hive.reloadFunctions(Hive.java:236) at org.apache.hadoop.hive.ql.metadata.Hive.registerAllFunctionsOnce(Hive.java:221) at org.apache.hadoop.hive.ql.metadata.Hive.init(Hive.java:366) at org.apache.hadoop.hive.ql.metadata.Hive.create(Hive.java:310) at org.apache.hadoop.hive.ql.metadata.Hive.getInternal(Hive.java:290) at org.apache.hadoop.hive.ql.metadata.Hive.get(Hive.java:266) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:545) at org.apache.hadoop.hive.ql.session.SessionState.beginStart(SessionState.java:518) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:705) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:641) 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:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: java.net.ConnectException: 拒绝连接 (Connection refused) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:607) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211) at com.mysql.jdbc.MysqlIO.init(MysqlIO.java:300) ... 85 more ------ NestedThrowables: java.sql.SQLException: Unable to open a test connection to the given database. JDBC url jdbc:mysql://localhost:2024/hive?createDatabaseIfNotExisttrue, username root. Terminating connection pool (set lazyInit to true if you expect to start your database after your app). Original Exception: ------ com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989) at com.mysql.jdbc.MysqlIO.init(MysqlIO.java:341) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2251) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2284) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083) at com.mysql.jdbc.ConnectionImpl.init(ConnectionImpl.java:806) at com.mysql.jdbc.JDBC4Connection.init(JDBC4Connection.java:47) 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:208) at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:361) at com.jolbox.bonecp.BoneCP.init(BoneCP.java:416) at com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:120) at org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:483) at org.datanucleus.store.rdbms.RDBMSStoreManager.init(RDBMSStoreManager.java:296) 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.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606) at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301) at org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:133) at org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:420) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:821) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:338) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:217) 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 javax.jdo.JDOHelper$16.run(JDOHelper.java:1965) at java.security.AccessController.doPrivileged(Native Method) at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960) at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166) at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:808) at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:701) at org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:424) at org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:453) at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:327) at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:294) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:76) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:136) at org.apache.hadoop.hive.metastore.RawStoreProxy.init(RawStoreProxy.java:58) at org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStore(HiveMetaStore.java:581) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:546) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:612) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:398) at org.apache.hadoop.hive.metastore.RetryingHMSHandler.init(RetryingHMSHandler.java:78) at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:84) at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6396) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.init(HiveMetaStoreClient.java:236) at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.init(SessionHiveMetaStoreClient.java:70) 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.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1625) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.init(RetryingMetaStoreClient.java:80) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:130) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:101) at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:3317) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3356) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3336) at org.apache.hadoop.hive.ql.metadata.Hive.getAllFunctions(Hive.java:3590) at org.apache.hadoop.hive.ql.metadata.Hive.reloadFunctions(Hive.java:236) at org.apache.hadoop.hive.ql.metadata.Hive.registerAllFunctionsOnce(Hive.java:221) at org.apache.hadoop.hive.ql.metadata.Hive.init(Hive.java:366) at org.apache.hadoop.hive.ql.metadata.Hive.create(Hive.java:310) at org.apache.hadoop.hive.ql.metadata.Hive.getInternal(Hive.java:290) at org.apache.hadoop.hive.ql.metadata.Hive.get(Hive.java:266) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:545) at org.apache.hadoop.hive.ql.session.SessionState.beginStart(SessionState.java:518) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:705) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:641) 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:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: java.net.ConnectException: 拒绝连接 (Connection refused) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:607) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211) at com.mysql.jdbc.MysqlIO.init(MysqlIO.java:300) ... 85 more ------ at org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:529) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:834) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:338) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:217) 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 javax.jdo.JDOHelper$16.run(JDOHelper.java:1965) at java.security.AccessController.doPrivileged(Native Method) at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960) at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166) at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:808) at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:701) at org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:424) at org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:453) at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:327) at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:294) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:76) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:136) at org.apache.hadoop.hive.metastore.RawStoreProxy.init(RawStoreProxy.java:58) at org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStore(HiveMetaStore.java:581) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:546) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:612) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:398) at org.apache.hadoop.hive.metastore.RetryingHMSHandler.init(RetryingHMSHandler.java:78) at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:84) at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6396) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.init(HiveMetaStoreClient.java:236) at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.init(SessionHiveMetaStoreClient.java:70) ... 28 more Caused by: java.sql.SQLException: Unable to open a test connection to the given database. JDBC url jdbc:mysql://localhost:2024/hive?createDatabaseIfNotExisttrue, username root. Terminating connection pool (set lazyInit to true if you expect to start your database after your app). Original Exception: ------ com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989) at com.mysql.jdbc.MysqlIO.init(MysqlIO.java:341) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2251) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2284) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083) at com.mysql.jdbc.ConnectionImpl.init(ConnectionImpl.java:806) at com.mysql.jdbc.JDBC4Connection.init(JDBC4Connection.java:47) 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:208) at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:361) at com.jolbox.bonecp.BoneCP.init(BoneCP.java:416) at com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:120) at org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:483) at org.datanucleus.store.rdbms.RDBMSStoreManager.init(RDBMSStoreManager.java:296) 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.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606) at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301) at org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:133) at org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:420) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:821) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:338) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:217) 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 javax.jdo.JDOHelper$16.run(JDOHelper.java:1965) at java.security.AccessController.doPrivileged(Native Method) at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960) at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166) at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:808) at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:701) at org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:424) at org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:453) at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:327) at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:294) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:76) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:136) at org.apache.hadoop.hive.metastore.RawStoreProxy.init(RawStoreProxy.java:58) at org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStore(HiveMetaStore.java:581) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:546) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:612) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:398) at org.apache.hadoop.hive.metastore.RetryingHMSHandler.init(RetryingHMSHandler.java:78) at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:84) at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6396) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.init(HiveMetaStoreClient.java:236) at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.init(SessionHiveMetaStoreClient.java:70) 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.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1625) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.init(RetryingMetaStoreClient.java:80) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:130) at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:101) at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:3317) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3356) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3336) at org.apache.hadoop.hive.ql.metadata.Hive.getAllFunctions(Hive.java:3590) at org.apache.hadoop.hive.ql.metadata.Hive.reloadFunctions(Hive.java:236) at org.apache.hadoop.hive.ql.metadata.Hive.registerAllFunctionsOnce(Hive.java:221) at org.apache.hadoop.hive.ql.metadata.Hive.init(Hive.java:366) at org.apache.hadoop.hive.ql.metadata.Hive.create(Hive.java:310) at org.apache.hadoop.hive.ql.metadata.Hive.getInternal(Hive.java:290) at org.apache.hadoop.hive.ql.metadata.Hive.get(Hive.java:266) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:545) at org.apache.hadoop.hive.ql.session.SessionState.beginStart(SessionState.java:518) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:705) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:641) 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:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: java.net.ConnectException: 拒绝连接 (Connection refused) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:607) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211) at com.mysql.jdbc.MysqlIO.init(MysqlIO.java:300) ... 85 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 com.jolbox.bonecp.PoolUtil.generateSQLException(PoolUtil.java:192) at com.jolbox.bonecp.BoneCP.init(BoneCP.java:422) at com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:120) at org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:483) at org.datanucleus.store.rdbms.RDBMSStoreManager.init(RDBMSStoreManager.java:296) 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.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606) at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301) at org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:133) at org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:420) at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:821) ... 57 more Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989) at com.mysql.jdbc.MysqlIO.init(MysqlIO.java:341) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2251) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2284) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083) at com.mysql.jdbc.ConnectionImpl.init(ConnectionImpl.java:806) at com.mysql.jdbc.JDBC4Connection.init(JDBC4Connection.java:47) 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:208) at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:361) at com.jolbox.bonecp.BoneCP.init(BoneCP.java:416) ... 69 more Caused by: java.net.ConnectException: 拒绝连接 (Connection refused) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:607) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211) at com.mysql.jdbc.MysqlIO.init(MysqlIO.java:300) ... 85 more 报错分析
从日志信息来看遇到的问题 过时的启动脚本start-all.sh 脚本已被废弃建议使用 start-dfs.sh 和 start-yarn.sh 分别启动分布式文件系统DFS和Yet Another Resource NegotiatorYARN。 SLF4J绑定冲突日志中显示类路径上存在多个SLF4J绑定。根据 SLF4J的多绑定错误页面你应该只保留一个SLF4J绑定在类路径上。可以通过检查 /usr/local/hive/lib/ 和 /usr/local/hadoop/share/hadoop/common/lib/ 路径下的JAR文件来解决这个冲突移除多余的绑定。 Hive MetaStore 连接问题日志中出现了 Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient 异常这通常是因为无法连接到Hive MetaStore服务。原因可能是 数据库连接问题Hive MetaStore试图连接到MySQL数据库时出现了 javax.jdo.JDOFatalDataStoreException 异常。确保MySQL服务正在运行并且Hive MetaStore配置的数据库URL、用户名和密码是正确的。 SSL连接问题日志中还包含了 javax.net.ssl.SSLHandshakeException 异常这表明在尝试建立SSL连接时出现了问题。这可能是因为MySQL服务器期望默认建立SSL连接但客户端没有正确配置。你可以通过设置 useSSLfalse 来禁用SSL连接或者设置 useSSLtrue 并提供信任的证书库以进行服务器证书验证。 通信链路故障com.mysql.jdbc.exceptions.jdbc4.CommunicationsException 表示与MySQL服务器的通信链路出现故障。可能是因为网络问题、MySQL服务器未运行或配置错误。
解决这些问题通常需要检查Hadoop和Hive的配置文件确保所有的服务都已经正确启动并且相关的依赖服务如MySQL也已经就绪并可以正常访问。你可能需要检查 hive-site.xml 配置文件中的数据库连接设置以及Hadoop和Hive的日志文件中可能包含的更详细的错误信息。 解决
发现只需要解决以下两个问题报错就可以成功运行hive了。
1. 数据库连接问题---确保MySQL服务运行
确保MySQL服务正在运行并且Hive MetaStore能够连接到它
运行sudo service mysql start或sudo systemctl start mysql来启动MySQL服务。使用mysql -u root -p登录MySQL并验证Hive使用的数据库和用户是否存在。 2. SSL连接问题---hive-site.xml 配置文件中的数据库连接设置
编辑Hive的配置文件hive-site.xml通过设置 useSSLfalse 来禁用SSL连接 hive-site.xml 配置文件它定义了 Hive Metastore 如何连接到 MySQL 数据库。以下是每个配置项的解释 Connection URL propertynamejavax.jdo.option.ConnectionURL/namevaluejdbc:mysql://localhost:3306/hive?createDatabaseIfNotExisttrue/valuedescriptionJDBC connect string for a MySQL connection/description
/property name: 配置项的名称用于在 Hive 配置中唯一标识这个配置项。value: 配置项的值这里是 JDBC URL用于连接到 MySQL 数据库。 jdbc:mysql://localhost:3306/hive: 指定了数据库服务器的地址localhost端口号3306以及数据库名称hive。?createDatabaseIfNotExisttrue: 这是一个查询参数告诉 MySQL 如果 hive 数据库不存在则创建它。同时useSSLfalse 禁用了 SSL 连接(MySQL 5.7.6 以后的版本默认要求 SSL 连接)。description: 配置项的描述说明这是用于 MySQL 连接的 JDBC 连接字符串。 Connection Driver Name propertynamejavax.jdo.option.ConnectionDriverName/namevaluecom.mysql.jdbc.Driver/valuedescriptionDriver class name for a MySQL connection/description
/property name: 配置项的名称。value: 配置项的值这里是 MySQL JDBC 驱动的类名。description: 配置项的描述说明这是用于 MySQL 连接的驱动类名。 Connection User Name propertynamejavax.jdo.option.ConnectionUserName/namevaluehive/valuedescriptionusername to use against MySQL connection/description
/property name: 配置项的名称。value: 配置项的值这里是用于连接到 MySQL 数据库的用户名hive。description: 配置项的描述说明这是用于 MySQL 连接的用户名。 Connection Password propertynamejavax.jdo.option.ConnectionPassword/namevaluehive/valuedescriptionpassword to use against MySQL connection/description
/property name: 配置项的名称。value: 配置项的值这里是用于连接到 MySQL 数据库的密码hive。description: 配置项的描述说明这是用于 MySQL 连接的密码。
