CF8 Server Restarts Under Load - Seems to be locked threads

Question

We are running a CF8 box on Win2k3 with around 400 active
datasources on a mix of SQL 2000 and SQL 2005 databases using JDBC
connections. We have the max running requests set to 12. Under
heavy load the request will start queueing. When they do, it's only
a matter of time before the service restarts. The standard output
logs are full of the following. Does that mean anything to anyone?
"obj-skimmer" daemon prio=5 tid=0x03bd5620 nid=0x1ba0 in
Object.wait() [0x5a30f000..0x5a30fd94]
at java.lang.Object.wait(Native Method)
- waiting on <0x15feeac8> (a
coldfusion.server.j2ee.pool.PoolSkimmerThread)
at
coldfusion.server.j2ee.pool.PoolSkimmerThread.run(PoolSkimmerThread.java:47)
- locked <0x15feeac8> (a
coldfusion.server.j2ee.pool.PoolSkimmerThread)
at java.lang.Thread.run(Thread.java:534)
"obj-skimmer" daemon prio=5 tid=0x03bd4940 nid=0x1628 in
Object.wait() [0x5a20f000..0x5a20fd94]
at java.lang.Object.wait(Native Method)
- waiting on <0x15feeb70> (a
coldfusion.server.j2ee.pool.PoolSkimmerThread)
at
coldfusion.server.j2ee.pool.PoolSkimmerThread.run(PoolSkimmerThread.java:47)
- locked <0x15feeb70> (a
coldfusion.server.j2ee.pool.PoolSkimmerThread)
at java.lang.Thread.run(Thread.java:534)
"obj-skimmer" daemon prio=5 tid=0x03bd3c98 nid=0xd84 in
Object.wait() [0x5a10f000..0x5a10fd94]
at java.lang.Object.wait(Native Method)
- waiting on <0x15feebc8> (a
coldfusion.server.j2ee.pool.PoolSkimmerThread)
at
coldfusion.server.j2ee.pool.PoolSkimmerThread.run(PoolSkimmerThread.java:47)
- locked <0x15feebc8> (a
coldfusion.server.j2ee.pool.PoolSkimmerThread)
at java.lang.Thread.run(Thread.java:534)

Answer 1

Hi John,Tia,
I thought I will peep into the forums before taking off for Diwali
Tia, as John correctly mentioned, it will be helpful if you can share your tomcat logs.
Meanwhile there are a few things you can try. RoboHelp server's default configuration is optimal for development/testing environment. There are a few settings you need to configure before you move to production environment.
1) Increase Java heap space: You can find details about this configuration in RoboHelp Server documentation. Here are a few links on how to do that:
)       http://www.adobe.com/products/robohelpserver/faq/ under header “How to Install Apache Tomcat?”
2)      http://help.adobe.com/en_US/RoboHelp/8.0/RoboHelpServer/WS5b3ccc516d4fbf351e63e3d11c0aaa9f d7-7ff4.html#WSa148d62006dae0de1172e0811dc117a846-8000
3)      http://blogs.adobe.com/techcomm/roboserver_8_gettingstarted.pdf under heading “Install Tomcat”
2) Increae java perm space :
You need to increase PermSpace available to your tomcat. You can do that using <tomcat-install-dir>/bin/tomcat6w.exe
Just ensure that your “Maximum memory pool” and “XX:MaxPermSize” should not add up to more than actual memory you can make available to tomcat.
The setting is as shown in this snapshot:
3) Ms Access database is not optimal for production environment. You should use SQL server or oracle database for production environment.
Hope this information helps
Tulika.