用JDBC连接informix数据库，出数据并将数据保存到本地时出现以下异常：

java.sql.SQLException: System or internal error java.net.SocketException: Socket closed

at com.informix.util.IfxErrMsg.getSQLException(IfxErrMsg.java:421)

at com.informix.jdbc.IfxSqli.flip(IfxSqli.java:2271)

at com.informix.jdbc.IfxSqli.receiveMessage(IfxSqli.java:2080)

at com.informix.jdbc.IfxSqli.executeClose(IfxSqli.java:1660)

at com.informix.jdbc.IfxResultSet.close(IfxResultSet.java:1503)

at util.CloseConnection.close(CloseConnection.java:15)

at com.picc.time.TimeDbTask.takeSingle(TimeDbTask.java:99)

at com.picc.time.BugXmlTimerTask.run(BugXmlTimerTask.java:61)

at java.util.TimerThread.mainLoop(Timer.java:512)

at java.util.TimerThread.run(Timer.java:462)

连接数据库时间视查询得到的数据量而定，而有时出现以下的问题：

java.sql.SQLException: Lock wait timeout exceeded; try restarting transaction

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2851)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1534)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1625)

at com.mysql.jdbc.Connection.execSQL(Connection.java:2297)

at com.mysql.jdbc.Connection.execSQL(Connection.java:2226)

at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1812)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1906)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1831)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1693)

at com.picc.time.TimeDbTask.takeSingle(TimeDbTask.java:96)

at com.picc.time.BugXmlTimerTask.run(BugXmlTimerTask.java:61)

at java.util.TimerThread.mainLoop(Timer.java:512)

at java.util.TimerThread.run(Timer.java:462)

作者: hysstrong

发布时间: 2010-10-11