weblogic.jdbc.extensions.PoolLimitSQLException

weblogic.jdbc.extensions.PoolLimitSQLException: weblogic.common.resourcepool.ResourceLimitException: No resources currently available in pool huangwei to allocate to applications, please increase the
size of the pool and retry..
        at weblogic.jdbc.common.internal.JDBCUtil.wrapAndThrowResourceException(JDBCUtil.java:242)
        at weblogic.jdbc.pool.Driver.connect(Driver.java:160)
        at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:642)
        at weblogic.jdbc.jts.Driver.connect(Driver.java:124)
        at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:339)
        at com.dhcc.db.GetDB.getConn(GetDB.java:249)
        at com.dhcc.dao.Dao.getDt(Dao.java:350)
        at jsp_servlet._graph.__index._jspService(__index.java:114)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:226)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:124)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:283)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3370)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(Unknown Source)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2117)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2023)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1359)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:200)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:172)