报错栈：

// :: INFO tool.CodeGenTool: Beginning code generation

// :: ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.RuntimeException: Could not load db driver class: com.intersys.jdbc.CacheDriver

java.lang.RuntimeException: Could not load db driver class: com.intersys.jdbc.CacheDriver

        at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:)

        at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:)

        at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:)

        at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:)

        at org.apache.sqoop.manager.SqlManager.getColumnInfoForRawQuery(SqlManager.java:)

        at org.apache.sqoop.manager.SqlManager.getColumnTypesForRawQuery(SqlManager.java:)

        at org.apache.sqoop.manager.SqlManager.getColumnTypesForQuery(SqlManager.java:)

        at org.apache.sqoop.manager.ConnManager.getColumnTypes(ConnManager.java:)

        at org.apache.sqoop.orm.ClassWriter.getColumnTypes(ClassWriter.java:)

        at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:)

        at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:)

        at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:)

        at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:)

        at org.apache.sqoop.Sqoop.run(Sqoop.java:)

        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:)

        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:)

        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:)

        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:)

        at org.apache.sqoop.Sqoop.main(Sqoop.java:)

原因：执行导入的MR任务时找不到数据库连接的驱动包，只需把CacheDB.jar放到$SQOOP_HOME/lib下即可，sqoop提交MR任务时会自动把这个目录下的所有Jar包放入MR Job的Classpath中

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