weblogic做服務器，今天進行了並發的測試性能，100的並大量，但是出現如下錯誤。

　　(並發中調用了數據庫，沒調用一次建立一個連接，由於是並發環境，導致連接池資源耗盡)

Caused by: org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
    at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:
 
545)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:315)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:234)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:
 
93)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
    at $Proxy95.getAgentGgDocumentDto(Unknown Source)
    at com.sinosoft.application.print.rpcservice.impl.PrintRpcServiceImpl.getBatchEReport(PrintRpcServiceImpl.java:
 
161)
    ... 16 more
Caused by: org.hibernate.exception.GenericJDBCException: Cannot open connection
    at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126)
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)
    at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449)
    at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
    at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142)
    at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85)
    at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354)
    at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:517)
    ... 23 more
Caused by: weblogic.jdbc.extensions.PoolLimitSQLException: weblogic.common.resourcepool.ResourceLimitException: No resources currently available in pool sinosoftDataSource to allocate to applications, please increase the size of the pool and retry..
    at weblogic.jdbc.common.internal.JDBCUtil.wrapAndThrowResourceException(JDBCUtil.java:252)
    at weblogic.jdbc.pool.Driver.connect(Driver.java:161)
    at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:651)
    at weblogic.jdbc.jts.Driver.connect(Driver.java:127)
    at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:364)
    at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:81)
    at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
    ... 28 more

這個問題是數據連接池不夠用了，將其設置為更大的數值（比如：100），這個問題解決。

2.第二個問題，當我數據連接池夠用的情況下，出現connection reset.

第一種可能：請求的資源（項目）性能達到了最大，導致不能處理過多的請求，連接被強制結束（客戶端達到了關閉請求的條件）（服務端項目性能問題）

第二種可能：weblogic設置了做大的連接數量（連接線程池），導致過的的請求直接被拒絕，連接重置　　　　　　　　　　　　　（weblogic配置問題）　

關於連接connection reset的問題