HIVE-1841 datanucleus.fixedDatastore should be true in hive-default.xml

[lalaguozhe]

hive如果同时执行hive语句比如create table或者grant语句会报错com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'hive8.DELETEME1356611646373' doesn't exist，这时因为hive默认datanucleus配置会在每次在mysql中创建一个deleteme表，然后删除来来得到schema 和 catalog信息，当并发量大的情况下，会生成相同名字的表，而第一个instance删除表后，当第二个instance要删除相同表的时候会抛出 table doesn't exist，这样导致整个操作失败，我查了下资料可以通过设置 datanucleus.autoCreateSchema=false datanucleus.fixedDatastore=true 来解决这个问题，但是修改后可能会导致不能创建元数据，所以有的人会配置两套配置，分别对应开发人员和使用人员，我们需要测试一下

[yixzhang]

参考https://issues.apache.org/jira/browse/HIVE-1841

[zhuguangbin]

完整的异常栈信息如下： 2013-02-19 12:18:32,114 ERROR ql.Driver (SessionState.java:printError(380)) - FAILED: Error in semantic analysis: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to fe tch table dpodssec_cs_contact org.apache.hadoop.hive.ql.parse.SemanticException: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to fetch table dpodssec_cs_contact at org.apache.hadoop.hive.ql.parse.DDLSemanticAnalyzer.analyzePrivilegeObject(DDLSemanticAnalyzer.java:514) at org.apache.hadoop.hive.ql.parse.DDLSemanticAnalyzer.analyzeGrant(DDLSemanticAnalyzer.java:454) at org.apache.hadoop.hive.ql.parse.DDLSemanticAnalyzer.analyzeInternal(DDLSemanticAnalyzer.java:357) at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:243) at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:430) at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:337) at org.apache.hadoop.hive.ql.Driver.run(Driver.java:898) at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:255) at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:212) at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:403) at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:338) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:637) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:554) 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 org.apache.hadoop.util.RunJar.main(RunJar.java:156) Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to fetch table dpodssec_cs_contact at org.apache.hadoop.hive.ql.metadata.Hive.getTable(Hive.java:909) at org.apache.hadoop.hive.ql.metadata.Hive.getTable(Hive.java:843) at org.apache.hadoop.hive.ql.parse.DDLSemanticAnalyzer.analyzePrivilegeObject(DDLSemanticAnalyzer.java:505) ... 17 more Caused by: javax.jdo.JDODataStoreException: Exception thrown obtaining schema column information from datastore NestedThrowables: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'hive8.DELETEME1361247511797' doesn't exist at org.datanucleus.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:313) at org.datanucleus.ObjectManagerImpl.getExtent(ObjectManagerImpl.java:4154) at org.datanucleus.store.rdbms.query.legacy.JDOQLQueryCompiler.compileCandidates(JDOQLQueryCompiler.java:411) at org.datanucleus.store.rdbms.query.legacy.QueryCompiler.executionCompile(QueryCompiler.java:312) at org.datanucleus.store.rdbms.query.legacy.JDOQLQueryCompiler.compile(JDOQLQueryCompiler.java:225) at org.datanucleus.store.rdbms.query.legacy.JDOQLQuery.compileInternal(JDOQLQuery.java:175) at org.datanucleus.store.query.Query.executeQuery(Query.java:1628) at org.datanucleus.store.rdbms.query.legacy.JDOQLQuery.executeQuery(JDOQLQuery.java:245) at org.datanucleus.store.query.Query.executeWithArray(Query.java:1499) at org.datanucleus.jdo.JDOQuery.execute(JDOQuery.java:243) at org.apache.hadoop.hive.metastore.ObjectStore.getMDatabase(ObjectStore.java:389) at org.apache.hadoop.hive.metastore.ObjectStore.getDatabase(ObjectStore.java:408) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB_core(HiveMetaStore.java:492) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.access$300(HiveMetaStore.java:141) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler$5.run(HiveMetaStore.java:514) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler$5.run(HiveMetaStore.java:511) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.executeWithRetry(HiveMetaStore.java:367) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:511) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:273) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.(HiveMetaStore.java:235) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.(HiveMetaStoreClient.java:114) at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2110) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2120) at org.apache.hadoop.hive.ql.metadata.Hive.getTable(Hive.java:901) ... 19 more Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'hive8.DELETEME1361247511797' doesn't exist 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:406) at com.mysql.jdbc.Util.getInstance(Util.java:381) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2536) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2465) at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1383) at com.mysql.jdbc.DatabaseMetaData$2.forEach(DatabaseMetaData.java:2471) at com.mysql.jdbc.IterateBlock.doForAll(IterateBlock.java:50) at com.mysql.jdbc.DatabaseMetaData.getColumns(DatabaseMetaData.java:2345) at org.apache.commons.dbcp.DelegatingDatabaseMetaData.getColumns(DelegatingDatabaseMetaData.java:218) at org.datanucleus.store.rdbms.adapter.DatabaseAdapter.getColumns(DatabaseAdapter.java:1460) at org.datanucleus.store.rdbms.schema.RDBMSSchemaHandler.refreshTableData(RDBMSSchemaHandler.java:924) at org.datanucleus.store.rdbms.schema.RDBMSSchemaHandler.getRDBMSTableInfoForTable(RDBMSSchemaHandler.java:823) at org.datanucleus.store.rdbms.schema.RDBMSSchemaHandler.getRDBMSTableInfoForTable(RDBMSSchemaHandler.java:772) at org.datanucleus.store.rdbms.schema.RDBMSSchemaHandler.getSchemaData(RDBMSSchemaHandler.java:207) at org.datanucleus.store.rdbms.RDBMSStoreManager.getColumnInfoForTable(RDBMSStoreManager.java:1699) at org.datanucleus.store.rdbms.table.TableImpl.validateColumns(TableImpl.java:218) at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.performTablesValidation(RDBMSStoreManager.java:2702) at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.addClassTablesAndValidate(RDBMSStoreManager.java:2503) at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.run(RDBMSStoreManager.java:2148) at org.datanucleus.store.rdbms.AbstractSchemaTransaction.execute(AbstractSchemaTransaction.java:113) at org.datanucleus.store.rdbms.RDBMSStoreManager.addClasses(RDBMSStoreManager.java:986) at org.datanucleus.store.rdbms.RDBMSStoreManager.addClasses(RDBMSStoreManager.java:952) at org.datanucleus.store.AbstractStoreManager.addClass(AbstractStoreManager.java:919) at org.datanucleus.store.mapped.MappedStoreManager.getDatastoreClass(MappedStoreManager.java:356) at org.datanucleus.store.rdbms.query.legacy.ExtentHelper.getExtent(ExtentHelper.java:48) at org.datanucleus.store.rdbms.RDBMSStoreManager.getExtent(RDBMSStoreManager.java:1332) at org.datanucleus.ObjectManagerImpl.getExtent(ObjectManagerImpl.java:4149) ... 41 more

[zhuguangbin]

通过修改以下两个配置，解决这个问题。 datanucleus.autoCreateSchema=false datanucleus.fixedDatastore=true