Do you have write permission to MySql?
From: Lei Lei [mailto:[email protected]]
Sent: Tuesday, April 08, 2014 7:05 PM
To: [email protected]
Subject: One question about "sqoop export"
Hi all,
I have one question about "sqoop export". Thanks!
My Hadoop version is 1.2.1, and it works well; my sqoop version is 1.4.4.
I also installed MySQL whose version is 5.1.73. In MySQL, I created one
table as below:
create table dimension_result (
result int not null primary key,
description VARCHAR(32) not null
);
On HDFS, I have a file called dimension_result.txt under /tmp/dr
See below.
hadoop fs -cat /tmp/dr/dimension_result.txt
1,BlackWin
2,WhiteWin
0,Draw
-1,Unknown
I want to export the content of dimension_result.txt to the MySQL table,
but it always failed.
My command is:
sqoop-export --connect
jdbc:mysql://127.0.0.1:3306/test<http://127.0.0.1:3306/test> --driver
com.mysql.jdbc.Driver --username hadoop --table dimension_result --export-dir
/tmp/dr
I also tried:
sqoop-export --connect
jdbc:mysql://127.0.0.1:3306/test<http://127.0.0.1:3306/test> --driver
com.mysql.jdbc.Driver --username hadoop --table dimension_result --export-dir
/tmp/dr/dimension_result.txt
(My MySQL instance does not need password, and the following command can
succeed.
sqoop-list-databases --connect
jdbc:mysql://127.0.0.1:3306<http://127.0.0.1:3306> --username hadoop )
The error info is as below. Does anyone know why? Thanks!
14/04/08 21:33:03 INFO mapred.JobClient: Task Id :
attempt_201403071512_0021_m_000000_1, Status : FAILED
java.io.IOException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The
driver has not received any packets from the server.
at
org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:79)
at
org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.<init>(MapTask.java:627)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:753)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:364)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
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.Child.main(Child.java:249)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The
driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1129)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:358)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2498)
at
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2535)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2320)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416)
at
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:347)
at java.sql.DriverManager.getConnection(DriverManager.java:571)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at
org.apache.sqoop.mapreduce.db.DBConfiguration.getConnection(DBConfiguration.java:294)
at
org.apache.sqoop.mapreduce.AsyncSqlRecordWriter.<init>(AsyncSqlRecordWriter.java:76)
at
org.apache.sqoop.mapreduce.ExportOutputFormat$ExportRecordWriter.<init>(ExportOutputFormat.java:95)
at
org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:77)
... 8 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:241)
at
com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:256)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:308)
... 26 more
Regards,
Finix
