I read the other related thread on this common communication failure, but my issue seems to different. When I login through putty to the system, I could not see mysql rpm installed. Running the mysql throws no command found and also checking service mysqld status gives "mysqld: unrecognized service". Did I miss something during instance/stack creation/configuration? Please Help.   Here is the log    [ec2-user@cloudera3 ~]$ sqoop import-all-tables -m 2 --connect jdbc:mysql://quickstart.cloudera:3306/retail_db --username=retail_dba --password=cloudera --compression-codec=snappy --as-parquetfile --warehouse-dir=/user/hive/warehouse --hive-import Warning: /opt/cloudera/parcels/CDH-5.4.2-1.cdh5.4.2.p0.2/bin/../lib/sqoop/../accumulo does not exist! Accumulo imports will fail. Please set $ACCUMULO_HOME to the root of your Accumulo installation. 16/01/13 12:12:31 INFO sqoop.Sqoop: Running Sqoop version: 1.4.5-cdh5.4.2 16/01/13 12:12:31 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead. 16/01/13 12:12:31 INFO tool.BaseSqoopTool: Using Hive-specific delimiters for output. You can override 16/01/13 12:12:31 INFO tool.BaseSqoopTool: delimiters with --fields-terminated-by, etc. 16/01/13 12:12:31 WARN tool.BaseSqoopTool: It seems that you're doing hive import directly into default 16/01/13 12:12:31 WARN tool.BaseSqoopTool: hive warehouse directory which is not supported. Sqoop is 16/01/13 12:12:31 WARN tool.BaseSqoopTool: firstly importing data into separate directory and then 16/01/13 12:12:31 WARN tool.BaseSqoopTool: inserting data into hive. Please consider removing 16/01/13 12:12:31 WARN tool.BaseSqoopTool: --target-dir or --warehouse-dir into /user/hive/warehouse in 16/01/13 12:12:31 WARN tool.BaseSqoopTool: case that you will detect any issues. 16/01/13 12:12:31 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset. 16/01/13 12:12:31 ERROR manager.CatalogQueryManager: Failed to list tables 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:377) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1036) at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:338) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2232) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44) 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:377) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:395) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325) at java.sql.DriverManager.getConnection(DriverManager.java:571) at java.sql.DriverManager.getConnection(DriverManager.java:215) at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:880) at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:52) at org.apache.sqoop.manager.CatalogQueryManager.listTables(CatalogQueryManager.java:102) at org.apache.sqoop.tool.ImportAllTablesTool.run(ImportAllTablesTool.java:95) at org.apache.sqoop.Sqoop.run(Sqoop.java:143) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227) at org.apache.sqoop.Sqoop.main(Sqoop.java:236) Caused by: java.net.UnknownHostException: quickstart.cloudera at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method) at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901) at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293) at java.net.InetAddress.getAllByName0(InetAddress.java:1246) at java.net.InetAddress.getAllByName(InetAddress.java:1162) at java.net.InetAddress.getAllByName(InetAddress.java:1098) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:190) at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:297) ... 24 more 16/01/13 12:12:31 ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.RuntimeException: 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. java.lang.RuntimeException: 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.manager.CatalogQueryManager.listTables(CatalogQueryManager.java:118) at org.apache.sqoop.tool.ImportAllTablesTool.run(ImportAllTablesTool.java:95) at org.apache.sqoop.Sqoop.run(Sqoop.java:143) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227) at org.apache.sqoop.Sqoop.main(Sqoop.java:236) 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:377) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1036) at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:338) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2232) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44) 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:377) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:395) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325) at java.sql.DriverManager.getConnection(DriverManager.java:571) at java.sql.DriverManager.getConnection(DriverManager.java:215) at org.apache.sqoop.manager.SqlManager.makeConnection(SqlManager.java:880) at org.apache.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:52) at org.apache.sqoop.manager.CatalogQueryManager.listTables(CatalogQueryManager.java:102) ... 7 more Caused by: java.net.UnknownHostException: quickstart.cloudera at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method) at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901) at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293) at java.net.InetAddress.getAllByName0(InetAddress.java:1246) at java.net.InetAddress.getAllByName(InetAddress.java:1162) at java.net.InetAddress.getAllByName(InetAddress.java:1098) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:190) at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:297) ... 24 more   I tried copy pasting the tutorial command, its same result as above. ... View more