Java.sql.SQLException: Lost connection to server during query

Question

Hi all,
While I execute the sql query, i get the following exception
java.sql.SQLException: Lost connection to server during query
     at org.gjt.mm.mysql.Connection.execSQL(Unknown Source)
     at org.gjt.mm.mysql.PreparedStatement.executeQuery(Unknown Source)
     at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:302)
Below is my code to execute the query.
String sqlQuery = "some query";
    Connection dbConnection=null;
    PreparedStatement stmt = null;
    ResultSet rs = null;
    try
      dbConnection=getDBConnection(); //perform lookup on the data source,   and return the connection
      stmt= prepareStmt(dbConnection, sqlQuery);
      rs = stmt.executeQuery(); //fail here
      //more below......
    catch(Exception e)
      throw e;
    finally
      releaseResource(stmt,dbConnection);
      closeResultSet(rs);
    }The DB i am using is MySql 4.0, Server: Jboss3.2. Could I know the possible reason that will cause the above exception?
Thanks for your help

Answer 1

Anyone would help me.
I am using linux, resin, jdk1.3 and Mysql plus mm.mysql driver. I write some static class which open one database connection for the class. I found that if the Server is ideal for period of time. When I doing the query again I meet same error message.
ava.sql.SQLException: Lost connection to server during query
at org.gjt.mm.mysql.Connection.execSQL(Unknown Source)
at org.gjt.mm.mysql.Connection.execSQL(Unknown Source)
at org.gjt.mm.mysql.Statement.executeQuery(Unknown Source)
at org.gjt.mm.mysql.jdbc2.Statement.executeQuery(Unknown Source)
at com.ccnet.desktop.Grouping.getDomainBanner(Grouping.java:1835)