Details
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Bug
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Status: Open
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Major
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Resolution: Unresolved
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0.8.1
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None
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None
Description
If multiple clients attempt to access/initialize the Hive Metastore at the same time they can fail due to error "Table 'metastore_DELETEME1347565995856' doesn't exist". A common scenario where this could happen is if there is a central mysql metastore and clients from multiple machines attempt to read from the metastore at the same time. This is outside of a standalone Hive Server install scenario.
I believe this is not actually a Hive bug, but instead a Data Nucleus issue.
Exception in thread "main" javax.jdo.JDODataStoreException: Exception thrown obtaining schema column information from datastore 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$HMSHandler.createDefaultDB_core(HiveMetaStore.java:485) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.access$300(HiveMetaStore.java:141) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler$5.run(HiveMetaStore.java:507) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler$5.run(HiveMetaStore.java:504) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.executeWithRetry(HiveMetaStore.java:360) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:504) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:266) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore.java:228) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:114) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:98) NestedThrowablesStackTrace: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'metastore_DELETEME1347565995856' 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:3558) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2637) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2566) at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1464) at com.mysql.jdbc.DatabaseMetaData$2.forEach(DatabaseMetaData.java:2472) at com.mysql.jdbc.IterateBlock.doForAll(IterateBlock.java:50) at com.mysql.jdbc.DatabaseMetaData.getColumns(DatabaseMetaData.java:2346) at org.apache.commons.dbcp.DelegatingDatabaseMetaData.getColumns(DelegatingDatabaseMetaData.java:218) at org.datanucleus.store.rdbms.adapter.DatabaseAdapter.getColumns(DatabaseAdapter.java:1460) at org.datanucleus.store.rdbms.schema.RDBMSSchemaHandler.refreshTableData(RDBMSSchemaHandler.java:924) at org.datanucleus.store.rdbms.schema.RDBMSSchemaHandler.getRDBMSTableInfoForTable(RDBMSSchemaHandler.java:823) at org.datanucleus.store.rdbms.schema.RDBMSSchemaHandler.getRDBMSTableInfoForTable(RDBMSSchemaHandler.java:772) at org.datanucleus.store.rdbms.schema.RDBMSSchemaHandler.getSchemaData(RDBMSSchemaHandler.java:207) at org.datanucleus.store.rdbms.RDBMSStoreManager.getColumnInfoForTable(RDBMSStoreManager.java:1699) at org.datanucleus.store.rdbms.table.TableImpl.validateColumns(TableImpl.java:218) at org.datanucleus.store.rdbms.RDBMSStoreManager$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) 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)