Error in metadata: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastor

hive> show tables;

FAILED: Error in metadata: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask

FAILED: Error in metadata: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClientFAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask

出现上述错误有很多原因：比如权限不够啊等若是权限不够可以参考
http://blog.csdn.net/lxpbs8851/article/details/11018933
若是the
specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH.

通过命令hive -hiveconf hive.root.logger=DEBUG,console

hive>show tables;
可以看到具体的错误如：
4/05/11 00:47:59 DEBUG metastore.ObjectStore: datanucleus.autoCreateTables = true

14/05/11 00:47:59 DEBUG metastore.ObjectStore: datanucleus.plugin.pluginRegistryBundleCheck = LOG

14/05/11 00:47:59 DEBUG metastore.ObjectStore: datanucleus.cache.level2.type = none

14/05/11 00:47:59 DEBUG metastore.ObjectStore: javax.jdo.PersistenceManagerFactoryClass = org.datanucleus.api.jdo.JDOPersistenceManagerFactory

14/05/11 00:47:59 DEBUG metastore.ObjectStore: datanucleus.autoCreateSchema = true

14/05/11 00:47:59 DEBUG metastore.ObjectStore: datanucleus.storeManagerType = rdbms

14/05/11 00:47:59 DEBUG metastore.ObjectStore: datanucleus.connectionPoolingType = DBCP

14/05/11 00:47:59 INFO metastore.ObjectStore: ObjectStore, initialize called

FAILED: Error in metadata: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

14/05/11 00:48:00 ERROR exec.Task: FAILED: Error in metadata: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1120)

at org.apache.hadoop.hive.ql.metadata.Hive.databaseExists(Hive.java:1105)

at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:2223)

at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:335)

at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:138)

at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:66)

at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1383)

at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1169)

at org.apache.hadoop.hive.ql.Driver.run(Driver.java:982)

at org.apache.hadoop.hive.ql.Driver.run(Driver.java:902)

at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)

at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)

at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:412)

at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:759)

at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:613)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:601)

at org.apache.hadoop.util.RunJar.main(RunJar.java:208)

Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1102)

at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:62)

at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:72)

at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2222)

at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2233)

at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1116)

... 19 more

Caused by: java.lang.reflect.InvocationTargetException

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:525)

at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1100)

... 24 more

Caused by: javax.jdo.JDOFatalInternalException: Error creating transactional connection factory

NestedThrowables:

java.lang.reflect.InvocationTargetException

at org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:587)

at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:781)

at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:326)

at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:195)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:601)

at javax.jdo.JDOHelper$16.run(JDOHelper.java:1958)

at java.security.AccessController.doPrivileged(Native Method)

at javax.jdo.JDOHelper.invoke(JDOHelper.java:1953)

at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1159)

at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:803)

at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:698)

at org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:262)

at org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:291)

at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:224)

at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:199)

at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:70)

at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:130)

at org.apache.hadoop.hive.metastore.RetryingRawStore.<init>(RetryingRawStore.java:62)

at org.apache.hadoop.hive.metastore.RetryingRawStore.getProxy(RetryingRawStore.java:71)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStore(HiveMetaStore.java:408)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:396)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:434)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:328)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore.java:289)

at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:56)

at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:61)

at org.apache.hadoop.hive.metastore.HiveMetaStore.newHMSHandler(HiveMetaStore.java:4014)

at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:120)

... 29 more

Caused by: java.lang.reflect.InvocationTargetException

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:525)

at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:631)

at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:325)

at org.datanucleus.store.AbstractStoreManager.registerConnectionFactory(AbstractStoreManager.java:281)

at org.datanucleus.store.AbstractStoreManager.<init>(AbstractStoreManager.java:239)

at org.datanucleus.store.rdbms.RDBMSStoreManager.<init>(RDBMSStoreManager.java:292)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:525)

at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:631)

at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301)

at org.datanucleus.NucleusContext.createStoreManagerForProperties(NucleusContext.java:1069)

at org.datanucleus.NucleusContext.initialise(NucleusContext.java:359)

at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:768)

... 58 more

Caused by: org.datanucleus.exceptions.NucleusException: Attempt to invoke the "DBCP" plugin to create a ConnectionPool gave an error : The specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH. Please
check your CLASSPATH specification, and the name of the driver.

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.generateDataSources(ConnectionFactoryImpl.java:237)

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.initialiseDataSources(ConnectionFactoryImpl.java:110)

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.<init>(ConnectionFactoryImpl.java:82)

... 76 more

Caused by: org.datanucleus.store.rdbms.datasource.DatastoreDriverNotFoundException: The specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH. Please check your CLASSPATH specification, and the name of the driver.

at org.datanucleus.store.rdbms.datasource.AbstractDataSourceFactory.loadDriver(AbstractDataSourceFactory.java:58)

at org.datanucleus.store.rdbms.datasource.DBCPDataSourceFactory.makePooledDataSource(DBCPDataSourceFactory.java:55)

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.generateDataSources(ConnectionFactoryImpl.java:217)

... 78 more

14/05/11 00:48:00 DEBUG exec.DDLTask: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1120)

at org.apache.hadoop.hive.ql.metadata.Hive.databaseExists(Hive.java:1105)

at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:2223)

at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:335)

at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:138)

at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:66)

at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1383)

at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1169)

at org.apache.hadoop.hive.ql.Driver.run(Driver.java:982)

at org.apache.hadoop.hive.ql.Driver.run(Driver.java:902)

at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)

at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)

at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:412)

at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:759)

at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:613)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:601)

at org.apache.hadoop.util.RunJar.main(RunJar.java:208)

Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1102)

at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:62)

at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:72)

at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2222)

at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2233)

at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1116)

... 19 more

Caused by: java.lang.reflect.InvocationTargetException

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:525)

at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1100)

... 24 more

Caused by: javax.jdo.JDOFatalInternalException: Error creating transactional connection factory

NestedThrowables:

java.lang.reflect.InvocationTargetException

at org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:587)

at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:781)

at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:326)

at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:195)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:601)

at javax.jdo.JDOHelper$16.run(JDOHelper.java:1958)

at java.security.AccessController.doPrivileged(Native Method)

at javax.jdo.JDOHelper.invoke(JDOHelper.java:1953)

at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1159)

at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:803)

at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:698)

at org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:262)

at org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:291)

at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:224)

at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:199)

at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:70)

at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:130)

at org.apache.hadoop.hive.metastore.RetryingRawStore.<init>(RetryingRawStore.java:62)

at org.apache.hadoop.hive.metastore.RetryingRawStore.getProxy(RetryingRawStore.java:71)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStore(HiveMetaStore.java:408)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:396)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:434)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:328)

at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore.java:289)

at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:56)

at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:61)

at org.apache.hadoop.hive.metastore.HiveMetaStore.newHMSHandler(HiveMetaStore.java:4014)

at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:120)

... 29 more

Caused by: java.lang.reflect.InvocationTargetException

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:525)

at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:631)

at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:325)

at org.datanucleus.store.AbstractStoreManager.registerConnectionFactory(AbstractStoreManager.java:281)

at org.datanucleus.store.AbstractStoreManager.<init>(AbstractStoreManager.java:239)

at org.datanucleus.store.rdbms.RDBMSStoreManager.<init>(RDBMSStoreManager.java:292)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:525)

at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:631)

at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301)

at org.datanucleus.NucleusContext.createStoreManagerForProperties(NucleusContext.java:1069)

at org.datanucleus.NucleusContext.initialise(NucleusContext.java:359)

at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:768)

... 58 more

Caused by: org.datanucleus.exceptions.NucleusException: Attempt to invoke the "DBCP" plugin to create a ConnectionPool gave an error : The specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH. Please check your CLASSPATH specification,
and the name of the driver.

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.generateDataSources(ConnectionFactoryImpl.java:237)

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.initialiseDataSources(ConnectionFactoryImpl.java:110)

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.<init>(ConnectionFactoryImpl.java:82)

... 76 more

Caused by: org.datanucleus.store.rdbms.datasource.DatastoreDriverNotFoundException: The specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH. Please check your CLASSPATH specification, and the name of the driver.

at org.datanucleus.store.rdbms.datasource.AbstractDataSourceFactory.loadDriver(AbstractDataSourceFactory.java:58)

at org.datanucleus.store.rdbms.datasource.DBCPDataSourceFactory.makePooledDataSource(DBCPDataSourceFactory.java:55)

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.generateDataSources(ConnectionFactoryImpl.java:217)

... 78 more

FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask
标红色的部分是我出现的错误，出现此错误有两种原因，一种就是hive的lib目录中没有Mysql的驱动jar包
另一中就是你hive的lib目录中有了Mysql的驱动jar包还是出现此问题，可以通过命令
[root@master etc]# which hive

/usr/bin/hive
说明当前执行的命令不是你配置的HIVE_HOME下的命令，删掉/usr/bin/hive后，source /etc/profile一下就可以解决：
在调用一次
[root@master etc]# which hive

/usr/Hive/hive-0.9.0-cdh4.1.5/bin/hive

就此就能解决上述问题