java.sql.SQLException:客户端尝试检出连接已超时
问题描述:
我有一个java客户端服务器,应该在启动时建立连接池,但其超时错误失败。上有同样的问题这么多线程,但没有解决方案的使用JDK 7为我工作java.sql.SQLException:客户端尝试检出连接已超时
AM以下是mchange行家依赖
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.2.1</version>
</dependency>
jdbc.properties
url=jdbc\:sqlserver\://server\\instance;databaseName\=db
driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
user=admin
password=admin
maxPoolSize=20
minPoolSize=5
acquireIncrement=5
这里是我的DAO类,它在服务器启动时建立连接池
public class ShareDocDAO {
//..........
private static Connection getConnection() throws SQLException {
LOG.info("Getting DB connection");
ComboPooledDataSource cpds = getPool();
return cpds.getConnection(); //Line 36:
}
private static ComboPooledDataSource getPool() {
if (pool!=null) {
return pool;
}
ComboPooledDataSource cpds = new ComboPooledDataSource();
try {
Properties dbProperties = getDbProperties();
//loads the jdbc driver
cpds.setDriverClass(dbProperties.getProperty("driver"));
cpds.setJdbcUrl(dbProperties.getProperty("url"));
cpds.setUser(dbProperties.getProperty("user"));
cpds.setPassword(dbProperties.getProperty("password"));
// the settings below are optional -- c3p0 can work with defaults
cpds.setMinPoolSize(Integer.valueOf(dbProperties.getProperty("minPoolSize")));
cpds.setAcquireIncrement(Integer.valueOf(dbProperties.getProperty("acquireIncrement")));
cpds.setMaxPoolSize(Integer.valueOf(dbProperties.getProperty("maxPoolSize")));
cpds.setCheckoutTimeout(30000);
cpds.setIdleConnectionTestPeriod(10800);
cpds.setMaxIdleTime(21600);
LOG.info("cpds driver "+cpds.getDriverClass()+ " JDBC URL = "+cpds.getJdbcUrl() +" User = "+cpds.getUser()+ " Pwd = "+cpds.getPassword()+ " MinPoolSize "+cpds.getMinPoolSize() +" AcquireIncrement "+cpds.getAcquireIncrement() +" MaxPoolSize "+cpds.getMaxPoolSize());
} catch (Exception ex) {
LOG.error("failed to create pool", ex);
}
pool = cpds;
return pool;
}
}
这里是堆栈跟踪
[Oct 29 11:58:22] SSLHandshake-3 | ERROR | com.dc.ssltunnel.server.ShareDocDAO | Error querying for User Information
java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:77)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:687)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
at com.dc.ssltunnel.server.ShareDocDAO.getConnection(ShareDocDAO.java:36)
at com.dc.ssltunnel.server.ShareDocDAO.checkSerialNumber(ShareDocDAO.java:75)
at com.dc.ssltunnel.server.MainServer.retrieveOrCreateClient(MainServer.java:95)
at com.dc.ssltunnel.server.MainServerHandshakeThread.handshake(MainServerHandshakeThread.java:58)
at com.dc.ssltunnel.server.MainServerHandshakeThread.run(MainServerHandshakeThread.java:71)
at com.dc.ssltunnel.utilities.threading.ShutdownThreadPoolExecutor$1.run(ShutdownThreadPoolExecutor.java:36)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from [email protected] -- timeout at awaitAvailable()
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1416)
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682)
... 12 more
[Oct 29 11:58:22] SSLHandshake-3 | DEBUG | com.dc.ssltunnel.server.MainServerHandshakeThread | Handshake thread is done
[Oct 29 11:58:22] SSLHandshake-3 | DEBUG | com.dc.ssltunnel.server.MainServerHandshakeThread | Handshake thread is done
[Oct 29 11:58:22] SSLHandshake-1 | INFO | com.dc.ssltunnel.server.ShareDocDAO | Getting DB connection
[Oct 29 11:58:22] SSLHandshake-1 | INFO | com.dc.ssltunnel.server.ShareDocDAO | Getting DB connection
[Oct 29 11:58:22] SSLHandshake-3 | DEBUG | com.dc.ssltunnel.utilities.threading.ShutdownThreadPoolExecutor | RUNNABLE:removing total:2
[Oct 29 11:58:22] SSLHandshake-3 | DEBUG | com.dc.ssltunnel.utilities.threading.ShutdownThreadPoolExecutor | RUNNABLE:removing total:2
[Oct 29 11:58:22] SSLHandshake-1 | ERROR | com.dc.ssltunnel.server.ShareDocDAO | Error querying for User Information
java.sql.SQLException: Connections could not be acquired from the underlying database!
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:689)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
at com.dc.ssltunnel.server.ShareDocDAO.getConnection(ShareDocDAO.java:36)
at com.dc.ssltunnel.server.ShareDocDAO.checkSerialNumber(ShareDocDAO.java:75)
at com.dc.ssltunnel.server.MainServer.retrieveOrCreateClient(MainServer.java:95)
at com.dc.ssltunnel.server.MainServerHandshakeThread.handshake(MainServerHandshakeThread.java:58)
at com.dc.ssltunnel.server.MainServerHandshakeThread.run(MainServerHandshakeThread.java:71)
at com.dc.ssltunnel.utilities.threading.ShutdownThreadPoolExecutor$1.run(ShutdownThreadPoolExecutor.java:36)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1418)
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682)
... 12 more
有人可以帮助我什么是错的,我的配置/代码?
答
问题一般是
Transaction.Begin()不是直接或间接调用。 所以这可能是一个会话的问题,SessionFactory的或配置
你总是可以通过调试这个,做一个查询您的会话对象,如果测试查询工作事务,然后添加到它,并开始(),提交()适当地
您是否在另一个工具中测试了这些参数以验证它们是否工作? – 2014-10-29 17:18:10
是的,我能够以相同的凭据登录到SQL Server管理工作室,我也有其他的网络应用程序,它运行良好,具有相同的jdbc属性 – RanPaul 2014-10-29 17:19:43
也许这是一个网络问题,确保你启动这个应用程序的服务器可以' ping“到数据库服务器。 – 2014-10-29 17:21:02