我有一个运行良好的Web servlet。我决定用RabbitMQ替换到后端服务器的TCP连接。在进行一些负载测试时，我注意到它很快就开始失败，超时等待空闲的JDBC连接。
ERROR [http-bio-8080-exec-12] JDBCExceptionReporter.logExceptions(234) | Cannot get a connection, pool error Timeout waiting for idle object
DEBUG [http-bio-8080-exec-12] JDBCExceptionReporter.logExceptions(225) | Cannot open connection [???]
org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object
at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:114)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:85)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:160)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:81)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1473)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:560)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:438)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:261)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653)
at net.hedtech.degreeworks.security.service.ShpPassportService$$EnhancerBySpringCGLIB$$9c441f05.getAndCheckPassportForRequest(<generated>)
at net.hedtech.degreeworks.security.spring.ShpPassportFilter.doFilter(ShpPassportFilter.java:124)
at net.hedtech.degreeworks.security.spring.ShpPassportFilter$$FastClassBySpringCGLIB$$8067e598.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:717)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
at com.sungardhe.degreeworks.util.SpringBeansProfiler.aroundAdvice(SpringBeansProfiler.java:92)
at sun.reflect.GeneratedMethodAccessor167.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:68)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653)
at net.hedtech.degreeworks.security.spring.ShpPassportFilter$$EnhancerBySpringCGLIB$$c08501d.doFilter(<generated>)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1174)
at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106)
此时我还没有实现任何池化。 RabbitMQ连接是在所有会话线程之间共享的单例。每个请求都会打开和关闭一个频道。
我的研究没有发现RabbitMQ和jdbc连接池之间的任何联系，但我不得不承认我只知道其中任何一个。
以下是我正在使用的代码：
String requestQueueName = "dw-dev-prototype";
QueueingConsumer consumer;
Channel channel = null;
String correlationId = UUID.randomUUID().toString();
String thisResponse = null;
String totalResponse = "";
StringBuffer sbResponse;
// We will create a new reply queue for each request
String replyQueueName = "";
try
{
// We will send the replyQueueName with the request so the server knows how to send the
// response back to us
channel = _connection.createChannel();
replyQueueName = channel.queueDeclare().getQueue();
consumer = new QueueingConsumer(channel);
channel.basicConsume(replyQueueName, AUTO_ACKNOWLEDGE, consumer);
BasicProperties props = new BasicProperties.Builder().correlationId(correlationId).replyTo(replyQueueName)
.build();
channel.basicPublish(NO_EXCHANGE, requestQueueName, props, sNameValuePairs.getBytes("UTF-8"));
}
catch (IOException e)
{
log.error("New connection IOException: " + e.getMessage(), e);
abortConnection(_connection, channel);
throw new RuntimeException(e);
}
while (true)
{
QueueingConsumer.Delivery delivery;
try
{
// Get the next response
delivery = consumer.nextDelivery();
thisResponse = new String(delivery.getBody(), "UTF-8");
// Ignore the response if it is not for our correlation-id
else if (delivery.getProperties().getCorrelationId().equals(correlationId))
{
if (thisResponse.equals(this._serviceFinishedMsg))
{
// No more text for this response - we are done
break;
}
else
{
totalResponse += thisResponse;
}
}
}
catch (ShutdownSignalException | ConsumerCancelledException | InterruptedException e)
{
log.error("Consumer exception: " + e.getMessage(), e);
throw new RuntimeException(e);
}
catch (UnsupportedEncodingException e)
{
log.error("UnsupportedEncoding exception: " + e.getMessage(), e);
throw new RuntimeException(e);
}
}
// Close now that we are done
try
{
if (channel != null && channel.isOpen())
{
channel.close();
}
}
catch (IOException | TimeoutException e)
{
log.error("Error closing channel or connection", e);
}
我在Tomcat容器中运行它。我正在使用Spring，但尚未使用Spring AMQP。
JDBC调用位于安全过滤器中，该过滤器在请求到达此方法之前运行。
关于如何解决这个问题的任何提示都会受到欢迎。
提前致谢。
答案 0 :(得分：0)
您发起的呼叫已调用aop - ＆gt;弹簧服务 - ＆gt;冬眠。 Hibernate正在调用commons dbcp并要求连接池。您可能正在耗尽此池中的连接，或者数据库已无法访问。我会投票给前者。
将java melody集成到您的应用中并再次进行部署。监视连接池并检查是否用完。如果你这样做......