使用Sqoop远程连接MySQL导入数据到HBase数据库：
sqoop import --driver com.mysql.jdbc.Driver --connect "jdbc:mysql://hzhiServer:3306/myssh?autoReconnect=true" --table table_001 --username hadoop --password 1 --hbase-table table_001 --column-family rcgl --hbase-row-key CHANNELID --hbase-create-table
出现了拒绝连接的错误：
Error: java.lang.RuntimeException: java.lang.RuntimeException: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.at org.apache.sqoop.mapreduce.db.DBInputFormat.setDbConf(DBInputFormat.java:170)at org.apache.sqoop.mapreduce.db.DBInputFormat.setConf(DBInputFormat.java:161)at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:73)at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:749)at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)at java.security.AccessController.doPrivileged(Native Method)at javax.security.auth.Subject.doAs(Subject.java:422)at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158) Caused by: java.lang.RuntimeException: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.at org.apache.sqoop.mapreduce.db.DBInputFormat.getConnection(DBInputFormat.java:223)at org.apache.sqoop.mapreduce.db.DBInputFormat.setDbConf(DBInputFormat.java:168)... 10 more Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.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.Util.getInstance(Util.java:408)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:918)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:897)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:886)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:860)at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2163)at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2088)at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:806)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:410)at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328)at java.sql.DriverManager.getConnection(DriverManager.java:664)at java.sql.DriverManager.getConnection(DriverManager.java:247)at org.apache.sqoop.mapreduce.db.DBConfiguration.getConnection(DBConfiguration.java:302)at org.apache.sqoop.mapreduce.db.DBInputFormat.getConnection(DBInputFormat.java:216)... 11 more Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureThe 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:425)at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989)at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:341)at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2251)at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2104)... 25 more Caused by: java.net.ConnectException: 拒绝连接 (Connection refused)at java.net.PlainSocketImpl.socketConnect(Native Method)at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)at java.net.Socket.connect(Socket.java:589)at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211)at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:300)... 27 more
把主机名换成IP地址就正常了。
