I haven't found a solution to this issue. It seems to be related to SAML2 
services. Any time one of them creates a service ticket, the thread count 
increases and never decreases.

I checked the 5.3 RC2 and it doesn't seem to have the same issue. Once that 
release is a stable version, I'll be testing that out for our deployment.



On Monday, August 28, 2017 at 9:02:48 AM UTC-5, Song, Doe-Hyun wrote:
>
> Good Morning All, 
>
>  
>
> Since we go to production with CAS 5.1, we keep having growing Thread 
> counts. 
>
>  
>
> We use ehcache for HA implementation and ldap for authentication. 
>
>
> Two types of threads – Timer and pool-3-thread – keep growing as time 
> goes. 
>
>  
>
> Any suggestion to debug this issue? 
>
>  
>
> Thread dump : 
>
>  
>
>  
>
> Full thread dump OpenJDK 64-Bit Server VM (25.101-b13 mixed mode):
>
>  
>
> "Timer-73" #512 daemon prio=5 os_prio=0 tid=0x00007f0520033000 nid=0x8041 
> in Object.wait() [0x00007f0509b5c000]
>
>    java.lang.Thread.State: TIMED_WAITING (on object monitor)
>
>         at java.lang.Object.wait(Native Method)
>
>         at java.util.TimerThread.mainLoop(Timer.java:552)
>
>         - locked <0x00000000afb48f10> (a java.util.TaskQueue)
>
>         at java.util.TimerThread.run(Timer.java:505)
>
>  
>
> "Timer-72" #509 daemon prio=5 os_prio=0 tid=0x00007f0520019800 nid=0x7fbc 
> in Object.wait() [0x00007f050a469000]
>
>    java.lang.Thread.State: TIMED_WAITING (on object monitor)
>
>         at java.lang.Object.wait(Native Method)
>
>         at java.util.TimerThread.mainLoop(Timer.java:552)
>
>         - locked <0x00000000afa333a0> (a java.util.TaskQueue)
>
>         at java.util.TimerThread.run(Timer.java:505)
>
>  
>
> "pool-3-thread-23" #508 prio=5 os_prio=0 tid=0x00007f05180b3000 nid=0x7f36 
> waiting on condition [0x00007f0509d60000]
>
>    java.lang.Thread.State: WAITING (parking)
>
>         at sun.misc.Unsafe.park(Native Method)
>
>         - parking to wait for  <0x00000000a7f17930> (a 
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>
>         at 
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
>
>         at 
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
>
>         at 
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
>
>         at 
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
>
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
>
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>
>         at java.lang.Thread.run(Thread.java:745)
>
>  
>
> "Timer-71" #507 daemon prio=5 os_prio=0 tid=0x00007f05180b8800 nid=0x7f35 
> in Object.wait() [0x00007f0509f62000]
>
>    java.lang.Thread.State: TIMED_WAITING (on object monitor)
>
>         at java.lang.Object.wait(Native Method)
>
>         at java.util.TimerThread.mainLoop(Timer.java:552)
>
>         - locked <0x00000000af974c00> (a java.util.TaskQueue)
>
>         at java.util.TimerThread.run(Timer.java:505)
>
>  
>
> "Timer-70" #506 daemon prio=5 os_prio=0 tid=0x00007f05506ba000 nid=0x7eb4 
> in Object.wait() [0x00007f0509e61000]
>
>    java.lang.Thread.State: TIMED_WAITING (on object monitor)
>
>         at java.lang.Object.wait(Native Method)
>
>         at java.util.TimerThread.mainLoop(Timer.java:552)
>
>         - locked <0x00000000af8cf808> (a java.util.TaskQueue)
>
>         at java.util.TimerThread.run(Timer.java:505)
>
>  
>
> "pool-3-thread-22" #496 prio=5 os_prio=0 tid=0x00007f05180b7800 nid=0x79dd 
> waiting on condition [0x00007f050a063000]
>
>    java.lang.Thread.State: WAITING (parking)
>
>         at sun.misc.Unsafe.park(Native Method)
>
>         - parking to wait for  <0x00000000a7f17930> (a 
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>
>         at 
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
>
>         at 
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
>
>         at 
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
>
>         at 
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
>
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
>
>  
>
> Thanks,
>
> Doe
>
>  
>
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