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本篇內容介紹了“執行 Job 時怎么省略輸入 MySQL 保存密碼”的有關知識，在實際案例的操作過程中，不少人都會遇到這樣的困境，接下來就讓丸趣 TV 小編帶領大家學習一下如何處理這些情況吧！希望大家仔細閱讀，能夠學有所成！
一、刪除 Job
sqoop job \
–delete testjob
二、創建 Job
說明：在創建 Job 時，我們使用 –password-file 參數，而且非 –passowrd。主要原因是在執行 Job 時使用 –password 參數將有警告，并且需要輸入密碼才能執行 Job。當我們采用 –password-file 參數時，執行 Job 無需輸入數據庫密碼。
sqoop job \
–create testjob \
— \
import \
–connect jdbc:mysql://192.168.137.130:3306/jepsondb \
–username root \
–password-file /input/sqoop.pwd \
–table abc \
–target-dir /input/abc \
–delete-target-dir \
-m 1
注：import 與 — 之間必須要有一個空格
三、執行 Job
sqoop job \
–exec testjob
四、創建 –password-file 參數需要的密碼文件(注：sqoop 規定密碼文件必須放在 HDFS 之上，并且權限必須為 400)
1、操作命令：
echo -n 123456 sqoop.pwd
hdfs dfs -rm sqoop.pwd /input/sqoop.pwd
hdfs dfs -put sqoop.pwd /input
hdfs dfs -chmod 400 /input/sqoop.pwd
hdfs dfs -ls /input
-r——– 1 hadoop supergroup 6 2018-01-15 18:38 /input/sqoop.pwd
2、檢查 sqoop 的配置文件 (sqoop-site.xml) 是否存在以下配置，并且 value 值為 true
property
name sqoop.metastore.client.record.password /name
value true /value
description If true, allow saved passwords in the metastore.
/description
/property
注：password 文件的格式不對錯誤提示如下：
arning: /app/sqoop-1.4.6-cdh6.7.0/../hbase does not exist! HBase imports will fail.
Please set $HBASE_HOME to the root of your HBase installation.
Warning: /app/sqoop-1.4.6-cdh6.7.0/../hcatalog does not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /app/sqoop-1.4.6-cdh6.7.0/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
Warning: /app/sqoop-1.4.6-cdh6.7.0/../zookeeper does not exist! Accumulo imports will fail.
Please set $ZOOKEEPER_HOME to the root of your Zookeeper installation.
18/01/15 18:33:50 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh6.7.0
18/01/15 18:33:53 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
18/01/15 18:33:53 INFO tool.CodeGenTool: Beginning code generation
18/01/15 18:33:54 ERROR manager.SqlManager: Error executing statement: java.sql.SQLException: Access denied for user root @ spark220 (using password: YES)
java.sql.SQLException: Access denied for user root @ spark220 (using password: YES)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:873)
at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1710)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1226)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2188)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2219)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2014)
at com.mysql.jdbc.ConnectionImpl. init (ConnectionImpl.java:776)
at com.mysql.jdbc.JDBC4Connection. init (JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:904)
at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:52)
at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:763)
at org.apache.sqoop.manager.SqlManager.execute(SqlManager.java:786)
at org.apache.sqoop.manager.SqlManager.getColumnInfoForRawQuery(SqlManager.java:289)
at org.apache.sqoop.manager.SqlManager.getColumnTypesForRawQuery(SqlManager.java:260)
at org.apache.sqoop.manager.SqlManager.getColumnTypes(SqlManager.java:246)
at org.apache.sqoop.manager.ConnManager.getColumnTypes(ConnManager.java:327)
at org.apache.sqoop.orm.ClassWriter.getColumnTypes(ClassWriter.java:1846)
at org.apache.sqoop.orm.ClassWriter.generate(ClassWriter.java:1646)
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)
18/01/15 18:33:54 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:1652)
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)
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