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From 丙子 <woyaof...@gmail.com>
Subject Fwd: hadoop map-reduce errors
Date Fri, 10 May 2013 01:32:02 GMT
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 .

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