执行Job时怎么省略输入MySQL保存密码

本篇内容介绍了“执行Job时怎么省略输入MySQL保存密码”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

一、删除Job

1. sqoop job \

2. --delete testjob

二、创建Job
说明：在创建Job时，我们使用--password-file参数，而且非--passowrd。主要原因是在执行Job时使用--password参数将有警告，并且需要输入密码才能执行Job。当我们采用--password-file参数时，执行Job无需输入数据库密码。

1. sqoop job \

2. --create testjob \

3. -- \

4. import \

5. --connect jdbc:mysql://192.168.137.130:3306/jepsondb \

6. --username root \

7. --password-file /input/sqoop.pwd \

8. --table abc \

9. --target-dir /input/abc \

10. --delete-target-dir \

11. -m 1

注：import与"--"之间必须要有一个空格

三、执行Job

1. sqoop job \

2. --exec testjob

四、创建--password-file参数需要的密码文件(注：sqoop规定密码文件必须放在HDFS之上，并且权限必须为400)
1、操作命令：

1. echo -n "123456" > sqoop.pwd

2. hdfs dfs -rm sqoop.pwd /input/sqoop.pwd

3. hdfs dfs -put sqoop.pwd /input

4. hdfs dfs -chmod 400 /input/sqoop.pwd

5. hdfs dfs -ls /input

6. -r--------   1 hadoop supergroup          6 2018-01-15 18:38 /input/sqoop.pwd

2、检查sqoop的配置文件(sqoop-site.xml)是否存在以下配置，并且value值为true

1. <property>
   

2.     <name>sqoop.metastore.client.record.password</name>
   

3.     <value>true</value>
   

4.     <description>If true, allow saved passwords in the metastore.
   

5.     </description>
   

6. </property>

注：password文件的格式不对错误提示如下：

1. arning: /app/sqoop-1.4.6-cdh6.7.0/../hbase does not exist! HBase imports will fail.

2. Please set $HBASE_HOME to the root of your HBase installation.

3. Warning: /app/sqoop-1.4.6-cdh6.7.0/../hcatalog does not exist! HCatalog jobs will fail.

4. Please set $HCAT_HOME to the root of your HCatalog installation.

5. Warning: /app/sqoop-1.4.6-cdh6.7.0/../accumulo does not exist! Accumulo imports will fail.

6. Please set $ACCUMULO_HOME to the root of your Accumulo installation.

7. Warning: /app/sqoop-1.4.6-cdh6.7.0/../zookeeper does not exist! Accumulo imports will fail.

8. Please set $ZOOKEEPER_HOME to the root of your Zookeeper installation.

9. 18/01/15 18:33:50 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh6.7.0

10. 18/01/15 18:33:53 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.

11. 18/01/15 18:33:53 INFO tool.CodeGenTool: Beginning code generation

12. 18/01/15 18:33:54 ERROR manager.SqlManager: Error executing statement: java.sql.SQLException: Access denied for user 'root'@'spark220' (using password: YES)

13. java.sql.SQLException: Access denied for user 'root'@'spark220' (using password: YES)

14. at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)

15. at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973)

16. at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909)

17. at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:873)

18. at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1710)

19. at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1226)

20. at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2188)

21. at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2219)

22. at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2014)

23. at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:776)

24. at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)

25. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

26. at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

27. at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

28. at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

29. at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)

30. at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)

31. at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)

32. at java.sql.DriverManager.getConnection(DriverManager.java:664)

33. at java.sql.DriverManager.getConnection(DriverManager.java:247)

34. at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:904)

35. at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:52)

36. at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:763)

37. at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:786)

38. at org.apache.sqoop.manager.SqlManager.getColumnInfoForRawQuery(SqlManager.java:289)

39. at org.apache.sqoop.manager.SqlManager.getColumnTypesForRawQuery(SqlManager.java:260)

40. at org.apache.sqoop.manager.SqlManager.getColumnTypes(SqlManager.java:246)

41. at org.apache.sqoop.manager.ConnManager.getColumnTypes(ConnManager.java:327)

42. at org.apache.sqoop.orm.ClassWriter.getColumnTypes(ClassWriter.java:1846)

43. at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1646)

44. at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:107)

45. at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:478)

46. at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:605)

47. at org.apache.sqoop.Sqoop.run(Sqoop.java:143)

48. at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)

49. at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179)

50. at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218)

51. at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227)

52. at org.apache.sqoop.Sqoop.main(Sqoop.java:236)

53. 18/01/15 18:33:54 ERROR tool.ImportTool: Encountered IOException running import job: java.io.IOException: No columns to generate for ClassWriter

54. at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1652)

55. at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:107)

56. at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:478)

57. at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:605)

58. at org.apache.sqoop.Sqoop.run(Sqoop.java:143)

59. at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)

60. at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179)

61. at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218)

62. at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227)

63. at org.apache.sqoop.Sqoop.main(Sqoop.java:236)

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