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
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