Issues in connecting to MYSQL DB

Lab Support
#1

PLease share some Examples to connect tot MYSQL from MAPREDUCE programming

#2

Sqoop command will be a good example where by it reads the data from mysql distributively and processes it using Hadoop MapReduce. Just that the Sqoop only has map phase not reduce phase.

#3

Thanks for your reply.Will work n using Sqoop.

1 Like
#4

sqoop list-databases
–connect jdbc:mysql://ip-172-31-13-154/sqoopex
–username sqoopuser
–password NHkkP876rp

ran this command but not getting result

output getting:
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/usr/hdp/2.6.2.0-205/hadoop/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/usr/hdp/2.6.2.0-205/accumulo/lib/slf4j-log4j12.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
20/06/17 09:05:18 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6.2.6.2.0-205
20/06/17 09:05:18 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
20/06/17 09:05:18 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
20/06/17 09:05:18 ERROR manager.CatalogQueryManager: Failed to list databases
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: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:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
at com.mysql.jdbc.MysqlIO.(MysqlIO.java:357)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2484)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2521)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2306)
at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:839)
at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:49)
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:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:421)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:350)
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.CatalogQueryManager.listDatabases(CatalogQueryManager.java:57)

please help