1.使用sqoop在hive中建立一個和mysql中資料結構一樣的表時報錯

 ERROR manager.SqlManager: Error reading from database: java.sql.SQLException: Streaming result set [email protected] is still active. No statements may be issued when any streaming result sets are open and in use on a given connection. Ensure that you have called .close() on any active streaming result sets before attempting more queries.
java.sql.SQLException: Streaming result set

[email protected] is still active. No statements may be issued when any streaming result sets are open and in use on a given connection. Ensure that you have called .close() on any active streaming result sets before attempting more queries.
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:930)
        at com.mysql.jdbc.MysqlIO.checkForOutstandingStreamingData(MysqlIO.java:2694)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1868)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2642)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2571)
        at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1464)
        at com.mysql.jdbc.ConnectionImpl.getMaxBytesPerChar(ConnectionImpl.java:3030)
        at com.mysql.jdbc.Field.getMaxBytesPerCharacter(Field.java:592)
        at com.mysql.jdbc.ResultSetMetaData.getPrecision(ResultSetMetaData.java:444)
        at org.apache.sqoop.manager.SqlManager.getColumnInfoForRawQuery(SqlManager.java:305)
        at org.apache.sqoop.manager.SqlManager.getColumnTypesForRawQuery(SqlManager.java:260)
        at org.apache.sqoop.manager.SqlManager.getColumnTypes(SqlManager.java:246)
        at org.apache.sqoop.hive.TableDefWriter.getCreateTableStmt(TableDefWriter.java:126)
        at org.apache.sqoop.hive.HiveImport.importTable(HiveImport.java:189)
        at org.apache.sqoop.tool.CreateHiveTableTool.run(CreateHiveTableTool.java:57)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
18/09/13 13:42:10 ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.NullPointerException
java.lang.NullPointerException
        at org.apache.sqoop.hive.TableDefWriter.getCreateTableStmt(TableDefWriter.java:175)
        at org.apache.sqoop.hive.HiveImport.importTable(HiveImport.java:189)
        at org.apache.sqoop.tool.CreateHiveTableTool.run(CreateHiveTableTool.java:57)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:252)

2.在將資料從MySQL匯入hive時也報錯：

java.sql.SQLException: Streaming result set [email protected] is still active. No statements may be issued when any streaming result sets are open and in use on a given connection. Ensure that you have called .close() on any active streaming result sets before attempting more queries.
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:930)
        at com.mysql.jdbc.MysqlIO.checkForOutstandingStreamingData(MysqlIO.java:2694)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1868)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2642)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2571)
        at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1464)
        at com.mysql.jdbc.ConnectionImpl.getMaxBytesPerChar(ConnectionImpl.java:3030)
        at com.mysql.jdbc.Field.getMaxBytesPerCharacter(Field.java:592)
        at com.mysql.jdbc.ResultSetMetaData.getPrecision(ResultSetMetaData.java:444)
        at org.apache.sqoop.manager.SqlManager.getColumnInfoForRawQuery(SqlManager.java:305)
        at org.apache.sqoop.manager.SqlManager.getColumnTypesForRawQuery(SqlManager.java:260)
        at org.apache.sqoop.manager.SqlManager.getColumnTypes(SqlManager.java:246)
        at org.apache.sqoop.manager.ConnManager.getColumnTypes(ConnManager.java:327)
        at org.apache.sqoop.orm.ClassWriter.getColumnTypes(ClassWriter.java:1858)
        at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1657)
        at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:106)
        at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:494)
        at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:621)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
18/09/13 14:05:20 ERROR tool.ImportTool: Import failed: java.io.IOException: No columns to generate for ClassWriter
        at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1663)
        at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:106)
        at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:494)
        at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:621)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:252)

解決方法：

這兩個問題都是因為mysql的驅動包版本問題，我用了5.1.10和5.10.18的驅動包都步行，後來找了一個5.1.32的驅動包匯入sqoop的lib目錄下就可以了。

5.1.32的下載地址是：http://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.32.tar.gz