帮忙看下引起这个异常是什么原因

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帮忙看下引起这个异常是什么原因5

java.net.SocketInputStream.socketRead0(Native Method)
java.net.SocketInputStream.read(SocketInputStream.java:129)
com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:113)
com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:160)
com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:188)
   - 已锁定 com.mysql.jdbc.util.ReadAheadInputStream@12bdea7
com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1902)
com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2351)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2862)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571)
com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1124)
   - 已锁定 java.lang.Object@126a791
com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:676)
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1166)
   - 已锁定 java.lang.Object@126a791
   - 已锁定 com.mysql.jdbc.ServerPreparedStatement@964484
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1082)
   - 已锁定 com.mysql.jdbc.ServerPreparedStatement@964484
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1067)
   - 已锁定 com.mysql.jdbc.ServerPreparedStatement@964484
com.unimas.ui2.dao.db.BaseDbOperator.executeSql(Unknown Source)
com.unimas.ui2.report.ReportThread.delSerConAudit(Unknown Source)
com.unimas.ui2.report.ReportThread.deleteService(Unknown Source)
com.unimas.ui2.report.ReportThread.report(Unknown Source)
com.unimas.ui2.report.ReportThread.run(Unknown Source)
java.lang.Thread.run(Thread.java:619)

请各位高手帮小弟看下引起上面这些异常的可能原因是什么.