Sqoop 导入数据报错：No columns to generate for ClassWriter

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使用Sqoop 导入数据报错信息如下：

[code]java.sql.SQLException: Streaming result set com.mysql.jdbc
18/09/07 10:09:20 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
18/09/07 10:09:20 INFO tool.CodeGenTool: Beginning code generation
18/09/07 10:09:20 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `EMP` AS t LIMIT 1
18/09/07 10:09:20 ERROR manager.SqlManager: Error reading from database: java.sql.SQLException: Streaming result set com.mysql.jdbc.RowDataDynamic@13c10b87 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 com.mysql.jdbc.RowDataDynamic@13c10b87 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:2622)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1846)
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.ConnectionImpl.getMaxBytesPerChar(ConnectionImpl.java:2931)
at com.mysql.jdbc.Field.getMaxBytesPerCharacter(Field.java:582)
at com.mysql.jdbc.ResultSetMetaData.getPrecision(ResultSetMetaData.java:441)
at org.apache.sqoop.manager.SqlManager.getColumnInfoForRawQuery(SqlManager.java:286)
at org.apache.sqoop.manager.SqlManager.getColumnTypesForRawQuery(SqlManager.java:241)
at org.apache.sqoop.manager.SqlManager.getColumnTypes(SqlManager.java:227)
at org.apache.sqoop.manager.ConnManager.getColumnTypes(ConnManager.java:295)
at org.apache.sqoop.orm.ClassWriter.getColumnTypes(ClassWriter.java:1833)
at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1645)
at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:107)
at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:478)
at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:605)
at org.apache.sqoop.Sqoop.run(Sqoop.java:143)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227)
at org.apache.sqoop.Sqoop.main(Sqoop.java:236)
18/09/07 10:09:21 ERROR tool.ImportTool: Encountered IOException running import job: java.io.IOException: No columns to generate for ClassWriter
at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1651)
at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:107)
at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:478)
at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:605)
at org.apache.sqoop.Sqoop.run(Sqoop.java:143)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227)
at org.apache.sqoop.Sqoop.main(Sqoop.java:236)

解决方案： 

mysql的jar导致，由于我用的是mysql-connector-java-5.1.6-bin.jar，更新成mysql-connector-java-5.1.40-bin.jar即可。

再次导入 

 

 

 

完成查看数据