500 Servlet Exception

[show] java.sql.SQLException: null,  message from server: "Can't create a new
thread (errno 11); if you are not out of available memory, you can consult
the manual for a possible OS-dependent bug"

org.springframework.transaction.CannotCreateTransactionException: Could
not open JDBC Connection for transaction; nested exception is java.sql.SQLException:
null,  message from server: "Can't create a new thread (errno 11); if you
are not out of available memory, you can consult the manual for a possible
OS-dependent bug"
	at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:238)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635)
	at cn.pconline.houselib.service.ProductService$$EnhancerByCGLIB$$1301c51e.wantBuyList(<generated>)
	at _jsp._jsp._template._product._box._hot_0product__jsp._jspService(jsp/template/product/box/hot_product.jsp:6)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:504)
	at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:368)
	at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:1009)
	at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:962)
	at _jsp._jsp._template._product._list__jsp._jspService(jsp/template/product/list.jsp:860)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:293)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
	at cn.pconline.houselib.util.UrlRewriteFilter.goForward(UrlRewriteFilter.java:1021)
	at cn.pconline.houselib.util.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:331)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at cn.pconline.houselib.util.EnvFilter.doFilter(EnvFilter.java:56)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:730)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:649)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.sql.SQLException: null,  message from server: "Can't create
a new thread (errno 11); if you are not out of available memory, you can
consult the manual for a possible OS-dependent bug"
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
	at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1104)
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2142)
	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:781)
	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
	at sun.reflect.GeneratedConstructorAccessor212.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:352)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:284)
	at com.caucho.sql.DriverConfig.createDriverConnection(DriverConfig.java:630)
	at com.caucho.sql.ManagedConnectionImpl.initDriverConnection(ManagedConnectionImpl.java:254)
	at com.caucho.sql.ManagedConnectionImpl.<init>(ManagedConnectionImpl.java:141)
	at com.caucho.sql.ManagedFactoryImpl.createManagedConnection(ManagedFactoryImpl.java:139)
	at com.caucho.jca.ConnectionPool.create(ConnectionPool.java:926)
	at com.caucho.jca.ConnectionPool.allocatePool(ConnectionPool.java:795)
	at com.caucho.jca.ConnectionPool.allocate(ConnectionPool.java:756)
	at com.caucho.jca.ConnectionPool.allocateConnection(ConnectionPool.java:567)
	at com.caucho.sql.DataSourceImpl.getConnection(DataSourceImpl.java:65)
	at com.caucho.sql.DBPool.getConnection(DBPool.java:701)
	at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:200)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635)
	at cn.pconline.houselib.service.ProductService$$EnhancerByCGLIB$$1301c51e.wantBuyList(<generated>)
	at _jsp._jsp._template._product._box._hot_0product__jsp._jspService(jsp/template/product/box/hot_product.jsp:6)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:504)
	at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:368)
	at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:1009)
	at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:962)
	at _jsp._jsp._template._product._list__jsp._jspService(jsp/template/product/list.jsp:860)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:293)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
	at cn.pconline.houselib.util.UrlRewriteFilter.goForward(UrlRewriteFilter.java:1021)
	at cn.pconline.houselib.util.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:331)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at cn.pconline.houselib.util.EnvFilter.doFilter(EnvFilter.java:56)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:730)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:649)
	at java.lang.Thread.run(Thread.java:662)