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https://issues.apache.org/jira/browse/SQOOP-2986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15572070#comment-15572070
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Hudson commented on SQOOP-2986:
-------------------------------
SUCCESS: Integrated in Jenkins build Sqoop-hadoop200 #1067 (See
[https://builds.apache.org/job/Sqoop-hadoop200/1067/])
SQOOP-2986: Add validation check for --hive-import and --incremental (maugli:
[https://git-wip-us.apache.org/repos/asf?p=sqoop.git&a=commit&h=14754342d3a9bd6e146b9628b2e103ff30f310d8])
* (add) src/test/org/apache/sqoop/tool/ImportToolValidateOptionsTest.java
* (edit) src/java/org/apache/sqoop/tool/BaseSqoopTool.java
> Add validation check for --hive-import and --incremental lastmodified
> ---------------------------------------------------------------------
>
> Key: SQOOP-2986
> URL: https://issues.apache.org/jira/browse/SQOOP-2986
> Project: Sqoop
> Issue Type: Bug
> Affects Versions: 1.4.6
> Reporter: Szabolcs Vasas
> Assignee: Szabolcs Vasas
> Fix For: 1.4.7
>
> Attachments: SQOOP-2986.patch, SQOOP-2986.patch
>
>
> Sqoop import with --hive-import and --incremental lastmodified options is not
> supported, however the application is able to run with these parameters but
> it produces unexpected results, the output can contain duplicate rows.
> Steps to reproduce the issue:
> 1) Create the necessary table for example in MySQL:
> CREATE TABLE "Employees" (
> "id" int(11) NOT NULL,
> "name" varchar(45) DEFAULT NULL,
> "salary" varchar(45) DEFAULT NULL,
> "change_date" datetime DEFAULT NULL,
> PRIMARY KEY ("id")
> ) ENGINE=MyISAM DEFAULT CHARSET=latin1;
> INSERT INTO `Employees` (`id`,`name`,`salary`,`change_date`) VALUES
> (1,'employee1',1000,now());
> INSERT INTO `Employees` (`id`,`name`,`salary`,`change_date`) VALUES
> (2,'employee2','2000',now());
> INSERT INTO `Employees` (`id`,`name`,`salary`,`change_date`) VALUES
> (3,'employee3','3000',now());
> INSERT INTO `Employees` (`id`,`name`,`salary`,`change_date`) VALUES
> (4,'employee4','4000',now());
> INSERT INTO `Employees` (`id`,`name`,`salary`,`change_date`) VALUES
> (5,'employee5','5000',now());
> 2) Import the table to Hive
> sudo -u hdfs sqoop import --connect jdbc:mysql://servername:3306/sqoop
> --username sqoop --password sqoop --table Employees --num-mappers 1
> --hive-import --hive-table Employees
> 3) Update some rows in MySQL:
> UPDATE Employees SET salary=1010, change_date=now() where id=1;
> UPDATE Employees SET salary=2010, change_date=now() where id=2;
> 4) Execute the incremental import command:
> sudo -u hdfs sqoop import --verbose --connect
> jdbc:mysql://servername:3306/sqoop --username sqoop --password sqoop --table
> Employees --incremental lastmodified --check-column change_date --merge-key
> id --num-mappers 1 --hive-import --hive-table Employees --last-value
> "last_timestamp"
> 5) As a result employees with ids 1 and 2 will not be updated but we will see
> duplicate rows in the Hive table.
> The task is to introduce a fail-fast validation which will make the Sqoop
> import fail if it was submitted with --hive-import and --incremental
> lastmodified options.
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