Hi Mark, How can I disable it?
2015-07-16 13:56 GMT-03:00 Mark Thomas <ma...@apache.org>: > On 16 July 2015 16:37:53 CEST, Robert Anderson <ranom...@gmail.com> wrote: > >Hi, > > > >Sometimes, in moments of high traffic for our patterns (170 req/sec), > >we > >have a lot of threads like that: > > > >"ajp-apr-8009-exec-115 ^ 16/07/2015 - 11:13:37 - End of Execute" daemon > >prio=10 tid=0x00002aaab5c36800 nid=0x12f9 waiting on condition > >[0x000000004ddcb000] > > java.lang.Thread.State: TIMED_WAITING (parking) > >at sun.misc.Unsafe.park(Native Method) > >- parking to wait for <0x0000000609a53198> (a > >java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > >at > >java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226) > >at > > >java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082) > >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:1068) > >at > > >java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) > >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) > > > >Thus, Tomcat hangs (all available threads stay in that state) and we > >have > >to restart the service. > > > >Server version: Apache Tomcat/7.0.63 > >Server built: Jun 30 2015 08:08:33 UTC > >Server number: 7.0.63.0 > >OS Name: Linux > >OS Version: 2.6.18-194.17.1.el5 > >Architecture: amd64 > >JVM Version: 1.7.0_80-b15 > >JVM Vendor: Oracle Corporation > > > >We are using tomcat-native (APR connector) and Apache (2.2.3) as load > >balancer with mod_jk. > > > > > >server.xml > > > ><?xml version='1.0' encoding='utf-8'?> > ><Server port="8005" shutdown="SHUTDOWN"> > > <Listener className="org.apache.catalina.core.AprLifecycleListener" > >SSLEngine="off" /> > > <Listener className="org.apache.catalina.core.JasperListener" /> > > <Listener > >className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /> > > <Listener > >className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" > >/> > > <Listener > >className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" > >/> > > <GlobalNamingResources> > > <Resource name="UserDatabase" auth="Container" > > type="org.apache.catalina.UserDatabase" > > description="User database that can be updated and saved" > > factory="org.apache.catalina.users.MemoryUserDatabaseFactory" > > pathname="conf/tomcat-users.xml" /> > > </GlobalNamingResources> > > > > <Service name="Catalina"> > > > > <Connector port="8080" protocol="HTTP/1.1" > > connectionTimeout="20000" > > redirectPort="8443" /> > > <Connector port="8009" enableLookups="false" connectionTimeout="60000" > >protocol="AJP/1.3" redirectPort="8443" /> > > > > <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomsrv04"> > > > > <Realm className="org.apache.catalina.realm.LockOutRealm"> > > <Realm className="org.apache.catalina.realm.UserDatabaseRealm" > > resourceName="UserDatabase" digest="SHA"/> > > </Realm> > > > > <Host name="localhost" appBase="webapps" > > unpackWARs="true" autoDeploy="true"> > > > ><Valve className="org.apache.catalina.valves.StuckThreadDetectionValve" > >threshold="60" interruptThreadThreshold="120" /> > > </Host> > > </Engine> > > </Service> > ></Server> > > > > > >Any suggestions? > > > > > >Thanks in advance. > > > > > >Robert > > Short since I'm on my phone. > > Connection exhaustion? > > Disable connection reuse or use NIO. > > Mark
