ActiveMQ：outOfMemoryError：无法创建新的本地线程

我目前正在加载测试activemq的默认REST API。我所有的100位用户都会尽可能快地将相同的消息文本写入同一目的地。几秒钟后，我得到：ActiveMQ：outOfMemoryError：无法创建新的本地线程

java.lang.OutOfMemoryError: unable to create new native thread 
     at java.lang.Thread.start0(Native Method) 
     at java.lang.Thread.start(Thread.java:640) 
     at org.apache.activemq.thread.TaskRunnerFactory.execute(TaskRunnerFactory.java:92) 
     at org.apache.activemq.thread.TaskRunnerFactory.execute(TaskRunnerFactory.java:85) 
     at org.apache.activemq.broker.TransportConnector$1.onAccept(TransportConnector.java:211) 
     at org.apache.activemq.transport.vm.VMTransportServer.connect(VMTransportServer.java:91) 
     at org.apache.activemq.transport.vm.VMTransportFactory.doCompositeConnect(VMTransportFactory.java:145) 
     at org.apache.activemq.transport.vm.VMTransportFactory.doConnect(VMTransportFactory.java:53) 
     at org.apache.activemq.transport.TransportFactory.doConnect(TransportFactory.java:51) 
     at org.apache.activemq.transport.TransportFactory.connect(TransportFactory.java:80) 
     at org.apache.activemq.ActiveMQConnectionFactory.createTransport(ActiveMQConnectionFactory.java:243) 
     at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:258) 
     at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:230) 
     at org.apache.activemq.ActiveMQConnectionFactory.createConnection(ActiveMQConnectionFactory.java:178) 
     at org.apache.activemq.web.WebClient.getConnection(WebClient.java:246) 
     at org.apache.activemq.web.WebClient.createSession(WebClient.java:348) 
     at org.apache.activemq.web.WebClient.getSession(WebClient.java:239) 
     at org.apache.activemq.web.MessageServletSupport.getDestination(MessageServletSupport.java:319) 
     at org.apache.activemq.web.MessageServletSupport.getDestination(MessageServletSupport.java:267) 
     at org.apache.activemq.web.MessageServlet.doPost(MessageServlet.java:110) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:713) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) 
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:527) 
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1216) 
     at org.apache.activemq.web.SessionFilter.doFilter(SessionFilter.java:45) 
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1187) 
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:421) 
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119) 
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:493) 
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225) 
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:930) 
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:358) 
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183) 
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:866) 
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) 
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126) 
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:456) 
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126) 
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113) 
     at org.eclipse.jetty.server.Server.handle(Server.java:351) 
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:594) 
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:1059) 
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:764) 
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:217) 
     at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:424) 
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:506) 
     at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436) 
     at java.lang.Thread.run(Thread.java:662)

因为我已经有10G heapspace运行，只有模拟10级REST的用户我不明白为什么ActiveMQ是产生8000个线程。我希望有人能帮我解决这个问题。

来源

2011-03-24 Laures

此内存泄漏的原因在于activemq的连接处理。默认的servlet为每个httpsession创建一个连接（这是一个非常糟糕的主意）。我的loadtesting工具不关心会话，也不会发送会话标识。所以每条发送的消息都是一个新的连接，是一个新的线程，在17.000个线程之后，jvm就完成了。

基本上，我要写一个新的servlet，每个工作线程使用一个连接。这应该将线程限制在最低限度。

来源

2011-03-27 18:58:04 Laures

+1。我们正面临同样的问题 “我要写一个新的servlet，每个工作线程使用一个连接，这应该限制线程数最低限度”你能解释一下你是如何实现这个的 – 2015-03-27 08:03:58

ActiveMQ：outOfMemoryError：无法创建新的本地线程

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