数据库拒绝服务

[2015-11-14 00:20:21][INFO ][richinfo.mms.action.MmsAction:223] MMS_LOGINTERFACE username=15862576764|type=1|action=19001|mouduleId=15outUrl=http://appmail.mail.10086.cn/m2012/html/mms/mmsRedirect.html|pageId=12|thingId=0|thing=sendMmsTab|userIp=|comeFrom=1002|serviceId=10|channelId=12|ext1=0|ext2=0|sessionkey=MTQ0NzQzMTYyMTAwMDgzODY301F77C53000001
[2015-11-14 00:20:40][ERROR][org.logicalcobwebs.proxool.oramail:194] #0026 encountered errors during destruction: 
java.sql.SQLException: Io 异常: Broken pipe
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.T4CConnection.logoff(T4CConnection.java:481) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.PhysicalConnection.close(PhysicalConnection.java:1228) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at org.logicalcobwebs.proxool.ProxyConnection.reallyClose(ProxyConnection.java:192) ~[proxool-0.9.1.jar:na]
        at org.logicalcobwebs.proxool.ConnectionPool.removeProxyConnection(ConnectionPool.java:423) [proxool-0.9.1.jar:na]
        at org.logicalcobwebs.proxool.HouseKeeper.sweep(HouseKeeper.java:90) [proxool-0.9.1.jar:na]
        at org.logicalcobwebs.proxool.HouseKeeperThread.run(HouseKeeperThread.java:39) [proxool-0.9.1.jar:na]
[2015-11-14 00:20:40][ERROR][org.logicalcobwebs.proxool.oramail:194] #0030 encountered errors during destruction: 
java.sql.SQLException: 无法从套接字读取更多的数据
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1123) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:1075) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.T4C7Ocommoncall.receive(T4C7Ocommoncall.java:106) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.T4CConnection.logoff(T4CConnection.java:465) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at oracle.jdbc.driver.PhysicalConnection.close(PhysicalConnection.java:1228) ~[ojdbc14-10.2.jar:Oracle JDBC Driver version - "10.2.0.4.0"]
        at org.logicalcobwebs.proxool.ProxyConnection.reallyClose(ProxyConnection.java:192) ~[proxool-0.9.1.jar:na]
        at org.logicalcobwebs.proxool.ConnectionPool.removeProxyConnection(ConnectionPool.java:423) [proxool-0.9.1.jar:na]
        at org.logicalcobwebs.proxool.HouseKeeper.sweep(HouseKeeper.java:90) [proxool-0.9.1.jar:na]
        at org.logicalcobwebs.proxool.HouseKeeperThread.run(HouseKeeperThread.java:39) [proxool-0.9.1.jar:na]
[2015-11-14 00:20:56][INFO ][richinfo.login.service.imp.ValidSidServiceImpl:563] checkUserSid|sid=MTQ0NzQzMDE3MTAwMDQ4ODQ0044D2B35000004|rmkey=3121659571447430171|remoteIP=14.123.196.111

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上边的异常表示服务器断开了和数据库操作的连接，可能的原因是DBA操作数据库，中断数据库