When i run a hadoop job ,there are some errors like this:
13/05/10 08:20:59 ERROR manager.SqlManager: Error executing statement:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
link failure
The last packet successfully received from the server was 28,484
milliseconds ago. The last packet sent successfully to the server was 1
milliseconds ago.
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
link failure
The last packet successfully received from the server was 28,484
milliseconds ago. The last packet sent successfully to the server was 1
milliseconds ago.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
……
……
at org.apache.sqoop.Sqoop.main(Sqoop.java:238)
at com.cloudera.sqoop.Sqoop.main(Sqoop.java:57)
Caused by: java.io.EOFException: Can not read response from server.
Expected to read 4 bytes, read 0 bytes before connection was unexpectedly
lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3039)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3489)
... 24 more
How can i resolve it .
