導出sqoop命令中的錯誤

Question

我在sqoop中使用export命令時，從hdfs導出到MySQL時sqoop此錯誤，該命令是：

sqoop export 
--connect jdbc:mysql://localhost/property 
--username root 
--password root 
--table xyz 
--m 1 
--export-dir abc.csv 

錯誤是：

16/08/30 23:11:33 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
16/08/30 23:11:34 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
16/08/30 23:11:34 INFO tool.CodeGenTool: Beginning code generation
16/08/30 23:11:34 ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.RuntimeException: Could not load db driver class: com.mysql.jdbc.Driver
java.lang.RuntimeException: Could not load db driver class: com.mysql.jdbc.Driver
    at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:848)
    at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:52)
    at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:736)
    at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:759)
    at org.apache.sqoop.manager.SqlManager.getColumnInfoForRawQuery(SqlManager.java:269)
    at org.apache.sqoop.manager.SqlManager.getColumnTypesForRawQuery(SqlManager.java:240)
    at org.apache.sqoop.manager.SqlManager.getColumnTypes(SqlManager.java:226)
    at org.apache.sqoop.manager.ConnManager.getColumnTypes(ConnManager.java:295)
    at org.apache.sqoop.orm.ClassWriter.getColumnTypes(ClassWriter.java:1773)
    at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1578)
    at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:96)
    at org.apache.sqoop.tool.ExportTool.exportTable(ExportTool.java:64)
    at org.apache.sqoop.tool.ExportTool.run(ExportTool.java:100)
    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)

Answer 1

在$SQOOP_HOME/lib添加mysql-connector.jar 。

根據Sqoop 文檔 ，

您可以將Sqoop與任何其他符合JDBC的數據庫一起使用。 首先，為要導入的數據庫類型下載適當的JDBC驅動程序，然后將.jar文件安裝在客戶端計算機上的$SQOOP_HOME/lib目錄中

也，

每個驅動程序.jar文件還具有特定的驅動程序類，該類定義了驅動程序的入口點。 例如，MySQL的Connector / J庫具有com.mysql.jdbc.Driver驅動程序類。 請參閱您的數據庫供應商特定的文檔，以確定主驅動程序類。 必須使用--driver將此類作為Sqoop的參數提供。

因此，在命令中添加--driver com.mysql.jdbc.Driver 。