Sqoop 匯入資料報錯：No columns to generate for ClassWriter
阿新 • • 發佈：2019-01-12
使用Sqoop 匯入資料報錯資訊如下：
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[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: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)
解決方案：
mysql的jar導致，由於我用的是mysql-connector-java-5.1.6-bin.jar，更新成mysql-connector-java-5.1.40-bin.jar即可。
再次匯入
完成檢視資料
