侯树成 wrote:
Hi, I find a problem of http bio connector,I need help. You can find it in flowing steps:1.set tomcat connector like this: <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" acceptCount="1" maxThreads="1" minSpareThreads="1"/> 2. deploy a war file, which contains a servlet that will sleep 60s in it's doPost method 3. use LR or JMeter send 5 requests to the serlvet above 4. use command jstack print current thread stack NOTE: now the main acceptor thread stack like this: "http-bio-8080-Acceptor-0" daemon prio=6 tid=0x04b49800 nid=0x1a88 waiting on condition [0x0536f000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x29a06cd0> (a org.apache.tomcat.util.threads.LimitLatch$Sync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:969) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1281) at org.apache.tomcat.util.threads.LimitLatch.countUpOrAwait(LimitLatch.java:115) at org.apache.tomcat.util.net.AbstractEndpoint.countUpOrAwaitConnection(AbstractEndpoint.java:733) at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:210) at java.lang.Thread.run(Thread.java:662) Now, In the 5 requests, 3 request will served correctly, but another 2 requests will received "Connection refused error" like this Caused by: java.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:529) Why the 2 requests not entering the thread pool executor or taskQueue, but get refused quickly? Thanks in advance.
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