在创建数据库/表时，我们在 Hive 上收到此错误
hive> CREATE TABLE pokes (foo INT, bar STRING);
FAILED: Error in metadata: javax.jdo.JDOFatalDataStoreException: Cannot get a connection, pool error Could not create a validated object, cause: A read-only user or a user in a read-only database is not permitted to disable read-only mode on a connection.
NestedThrowables:
org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool error Could not create a validated object, cause: A read-only user or a user in a read-only database is not permitted to disable read-only mode on a connection.
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask
蜂巢日志：
org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool error Could not create a validated object, cause: A read-only user or a user in a read-only database is not permitted to disable read-only mode on a connection.
at org.datanucleus.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:298)
at org.datanucleus.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:601)
at org.datanucleus.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:286)
at org.datanucleus.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:182)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at javax.jdo.JDOHelper$16.run(JDOHelper.java:1958)
at java.security.AccessController.doPrivileged(Native Method)
at javax.jdo.JDOHelper.invoke(JDOHelper.java:1953)
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1159)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:803)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:698)
at org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:234)
at org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:261)
at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:196)
at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:171)
at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:62)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:354)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.executeWithRetry(HiveMetaStore.java:306)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:451)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:232)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore.java:197)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:108)
at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:1868)
at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:1878)
at org.apache.hadoop.hive.ql.metadata.Hive.createTable(Hive.java:470)
... 15 more
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool error Could not create a validated object, cause: A read-only user or a user in a read-only database is not permitted to disable read-only mode on a connection.
at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:114)
at org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:521)
at org.datanucleus.store.rdbms.RDBMSStoreManager.<init>(RDBMSStoreManager.java:290)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:588)
at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:300)
at org.datanucleus.ObjectManagerFactoryImpl.initialiseStoreManager(ObjectManagerFactoryImpl.java:161)
at org.datanucleus.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:583)
... 42 more
Caused by: java.util.NoSuchElementException: Could not create a validated object, cause: A read-only user or a user in a read-only database is not permitted to disable read-only mode on a connection.
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1191)
at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106)
... 52 more
2011-08-11 18:02:36,964 ERROR ql.Driver (SessionState.java:printError(343)) - FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask
答案1
如果您使用默认的 Derby 数据库来存储 Hive 元数据，则必须以对数据库文件具有写权限的用户身份运行 Hive。
您可以使用任何带有 JDBC 驱动程序的数据库来存储元数据；如果您正在运行开发环境，那么这没问题，但任何使用率更高的数据库都应该转移到其他数据库。如果您喜欢自虐和过度杀伤，那么选择包括 MySQL、Postgres 或 Oracle。