Thank you for answer. As a further explanation, after a certain amount of time has elapsed after applying the same load to both groups, all threads in the tomcat7 group are in the TIME-WAITING state, and TOMCAT8 is in the RUNNABLE state. So I guess there is a difference in THREAD behavior between Tomcat versions. -----Original Message----- From: "Rainer Jung"<rainer.j...@kippdata.de> To: "Tomcat Users List"<users@tomcat.apache.org>; "이의준"<ej....@time-gate.com>; Cc: Sent: 2018-03-27 (화) 22:16:20 Subject: Re: Thread state differences according to Tomcat 7, 8 version. See below
Am 27.03.2018 um 07:50 schrieb 이의준: > Hi ! > > English is not my native language; please excuse typing errors. > > Why is Tomcat not handling requests with 8 versions, but in the RUNNABLE > state, not the TIME_WAITING state of the Tomcat 7 version? > > Please confirm that this operation works normally. > > > > #################Tomcat 7.0.75 jdk 1.7.0.65 > > > > #server.xml > > <!-- Define an AJP 1.3 Connector on port 8009 --> > > <Connector port="7009" protocol="AJP/1.3" redirectPort="9443" > URIEncoding="UTF-8" > > acceptCount="200" acceptorThreadCount="2" maxThreads="300" > > minSpareThreads="50" connectionTimeout="15000"/> > > > > #There are more than 40 threads with the following stacks: > > > > "ajp-apr-7009-exec-111" #10247 daemon prio=5 os_prio=0 > tid=0x00007fa6b811f000 nid=0x2f51 waiting on condition [0x00007fa6aa7b8000] > > java.lang.Thread.State: TIMED_WAITING (parking) > > at sun.misc.Unsafe.park(Native Method) > > - parking to wait for <0x0000000083769178> (a > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > > at > java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215) > > at > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitN > anos(AbstractQueuedSynchronizer.java:2078) > > at > java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467) > > at > org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:86) > > at > org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:32) > > at > java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066 > ) > > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:11 > 27) > > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:6 > 17) > > at > org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.ja > va:61) > > at java.lang.Thread.run(Thread.java:745) These are thread idle in the thread pool. > ############Tomcat 8.0.44 jdk 1.8.0.131 > > > > #server.xml > > <!-- Define an AJP 1.3 Connector on port 8009 --> > > <Connector port="7009" protocol="AJP/1.3" redirectPort="9443" > URIEncoding="UTF-8" > > acceptCount="200" acceptorThreadCount="2" maxThreads="300" > > minSpareThreads="50" connectionTimeout="15000"/> > > > > There are more than 50 threads with the following stacks: > > > > "ajp-apr-7009-exec-1083" #19321 daemon prio=5 os_prio=0 > tid=0x00007fcd1405d800 nid=0x19fe runnable [0x00007fcc373f2000] > > java.lang.Thread.State: RUNNABLE > > at org.apache.tomcat.jni.Socket.recvbb(Native Method) > > at > org.apache.coyote.ajp.AjpAprProcessor.readSocket(AjpAprProcessor.java:256) > > at > org.apache.coyote.ajp.AjpAprProcessor.read(AjpAprProcessor.java:197) > > at > org.apache.coyote.ajp.AbstractAjpProcessor.readMessage(AbstractAjpProcessor. > java:1091) > > at > org.apache.coyote.ajp.AbstractAjpProcessor.process(AbstractAjpProcessor.java > :804) > > at > org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(Abstrac > tProtocol.java:684) > > at > org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEnd > point.java:2458) > > - locked <0x00000000f6bce3a0> (a > org.apache.tomcat.util.net.AprEndpoint$AprSocketWrapper) > > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:11 > 42) > > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:6 > 17) > > at > org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.ja > va:61) > > at java.lang.Thread.run(Thread.java:748) These are threads which are busy from the point of view of the thread pool, but what they are doing is waiting for more data to arrive on a connection they handle. So the two groups of threads you have chosen are really in a different state, not only Tomcat or Java version wise. Regards, Rainer
