Import data from mysql into HDFS using Sqoop - mysql

Question

I am using Hadoop-1.2.1 and Sqoop-1.4.6. I am using sqoop to import the table test from the database meshtree into HDFS using this command:
`sqoop import --connect jdbc:mysql://localhost/meshtree --username user --password password --table test`
But, it shows this error:
17/06/17 18:15:21 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
17/06/17 18:15:21 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
17/06/17 18:15:21 INFO tool.CodeGenTool: Beginning code generation
17/06/17 18:15:22 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `test` AS t LIMIT 1
17/06/17 18:15:22 INFO orm.CompilationManager: HADOOP_HOME is /home/student /Installations/hadoop-1.2.1/libexec/..
Note: /tmp/sqoop-student/compile/6bab6efaa3dc60e67a50885b26c1d14b/test.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
17/06/17 18:15:24 ERROR orm.CompilationManager: Could not rename /tmp/sqoop- student/compile/6bab6efaa3dc60e67a50885b26c1d14b/test.java to /home/student /Installations/hadoop-1.2.1/./test.java
org.apache.commons.io.FileExistsException: Destination '/home/student /Installations/hadoop-1.2.1/./test.java' already exists
at org.apache.commons.io.FileUtils.moveFile(FileUtils.java:2378)
at org.apache.sqoop.orm.CompilationManager.compile(CompilationManager.java:227)
at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:83)
at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:367)
at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:453)
at org.apache.sqoop.Sqoop.run(Sqoop.java:145)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:181)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:220)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:229)
at org.apache.sqoop.Sqoop.main(Sqoop.java:238)
at com.cloudera.sqoop.Sqoop.main(Sqoop.java:57)
17/06/17 18:15:24 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop- student/compile/6bab6efaa3dc60e67a50885b26c1d14b/test.jar
17/06/17 18:15:24 WARN manager.MySQLManager: It looks like you are importing from mysql.
17/06/17 18:15:24 WARN manager.MySQLManager: This transfer can be faster! Use the --direct
17/06/17 18:15:24 WARN manager.MySQLManager: option to exercise a MySQL- specific fast path.
17/06/17 18:15:24 INFO manager.MySQLManager: Setting zero DATETIME behavior to convertToNull (mysql)
17/06/17 18:15:24 INFO mapreduce.ImportJobBase: Beginning import of test
17/06/17 18:15:27 INFO mapred.JobClient: Cleaning up the staging area hdfs://localhost:9000/home/student/Installations/hadoop-1.2.1/data/mapred /staging/student/.staging/job_201706171814_0001
17/06/17 18:15:27 ERROR security.UserGroupInformation: PriviledgedActionException as:student cause:org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory test already exists
17/06/17 18:15:27 ERROR tool.ImportTool: Encountered IOException running import job: org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory test already exists
at org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.checkOutputSpecs(FileO utputFormat.java:137)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:973)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:936)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:936)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:550)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:580)
at org.apache.sqoop.mapreduce.ImportJobBase.runJob(ImportJobBase.java:141)
at org.apache.sqoop.mapreduce.ImportJobBase.runImport(ImportJobBase.java:201)
at org.apache.sqoop.manager.SqlManager.importTable(SqlManager.java:413)
at org.apache.sqoop.manager.MySQLManager.importTable(MySQLManager.java:97)
at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:380)
at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:453)
at org.apache.sqoop.Sqoop.run(Sqoop.java:145)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:181)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:220)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:229)
at org.apache.sqoop.Sqoop.main(Sqoop.java:238)
at com.cloudera.sqoop.Sqoop.main(Sqoop.java:57)
Is there any way to figure out this problem?

Answer 1

It’s important that you do not use the URL localhost if you intend to use Sqoop with a distributed Hadoop cluster. The connect string you supply will be used on TaskTracker nodes throughout your MapReduce cluster; if you specify the literal name localhost, each node will connect to a different database (or more likely, no database at all). Instead, you should use the full hostname or IP address of the database host that can be seen by all your remote nodes.
Please visit Sqoop Document Connecting to a Database Server section for more information.

Answer 2

You don't permissions.So contact myql dba to grant you the same.
Or you may do yourself if you have admin access to mysql.
grant all privileges on databasename.* to 'username'#'%' identified by 'password';
*-for all tables
%- allow from any host
The above syntax is to grant permission to user in mysql server.In your case it will be:-
grant all privileges on meshtree.test to 'root'#'localhost' identified by 'yourpassword';

Answer 3

you are importing without providing target directory of hdfs. when we are not providing any target directory sqoop run import only once and create directory in hdfs with your mysql table name.
So your query
sqoop import --connect jdbc:mysql://localhost/meshtree --username user --password password --table test
this create a directory with the name test1 in hdfs
Just add following script
sqoop import --connect jdbc:mysql://localhost/meshtree --username user --password password --table test --target-dir test1
hope fully its work fine and just refer sqoop import and all related sqoop