问java.sql.SQLException: I/O错误:由对等方重置连接:套接字写入错误

EN

我使用的是jTDS，它是一个100%纯Java (type 4) JDBC 3.0驱动程序，用于Microsoft SQL Server (2012)。

Tomcat 7 -我有下面的连接池配置

<?xml version="1.0" encoding="UTF-8"?>
<Context antiJARLocking="true" path="/webapp">
    <Resource name="jdbc/dbname" auth="Container" type="javax.sql.DataSource"
               maxActive="100" maxIdle="30" maxWait="10000" removeAbandoned="true" removeAbandonedTimeout="60"
               username="abc" password="abc" driverClassName="net.sourceforge.jtds.jdbc.Driver"
               url="jdbc:jtds:sqlserver://localhost;databaseName=dbname;SelectMethod=Cursor"/>
</Context>

有时，我会得到以下异常--无法从sql server获得连接。我不知道为什么？

I/O错误:点对点重新设置连接:套接字写入错误在net.sourceforge.jtds.jdbc.TdsCore.executeSQL(TdsCore.java:1052) at net.sourceforge.jtds.jdbc.JtdsStatement.executeSQLQuery(JtdsStatement.java:465) at net.sourceforge.jtds.jdbc.JtdsPreparedStatement.executeQuery(JtdsPreparedStatement.java:777) at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:93) at at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662)，由: java.net.SocketException:对等方重置连接: java.net.SocketOutputStream.socketWrite0(Native方法的套接字写入错误引起)在java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at java.io.DataOutputStream.write(DataOutputStream.java:90) at net.sourceforge.jtds.jdbc.SharedSocket.sendNetPacket(SharedSocket.java:671) at net.sourceforge.jtds.jdbc.RequestStream.putPacket(RequestStream.java:560) at net.sourceforge.jtds.jdbc.RequestStream.flush(RequestStream.java:508) at net.sourceforge.jtds.jdbc.TdsCore.executeSQL(TdsCore.java:1039) .8多8点-2015年4月12:00:54错误处理程序:614- SQLException java.sql.SQLException:已经关闭。在org.apache.tomcat.dbcp.dbcp.PoolableConnection.close(PoolableConnection.java:84) at org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.close(PoolingDataSource.java:181) at at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662 )