Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-20 Thread Frederik Nosi
On 11/19/2014 09:27 PM, Lisa Woodring wrote: Actually, I received a little clarification on the monitoring software (I didn't write it). What it's trying to test is that the AJP port itself is actually accepting connections. With Apache in front in a production system, it could forward the

Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-20 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Lisa, On 11/19/14 1:36 PM, Lisa Woodring wrote: On Tue, Nov 18, 2014 at 2:43 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Lisa, On 11/18/14 11:52 AM, Lisa Woodring wrote: We

Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-20 Thread Lisa Woodring
Chris, On Thu, Nov 20, 2014 at 3:16 PM, Christopher Schultz ch...@christopherschultz.net wrote: Lisa, On 11/19/14 1:36 PM, Lisa Woodring wrote: On Tue, Nov 18, 2014 at 2:43 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Lisa,

Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-19 Thread Lisa Woodring
On Tue, Nov 18, 2014 at 2:26 PM, André Warnier a...@ice-sa.com wrote: Lisa Woodring wrote: ... In order to monitor the availability of the HTTPS/AJP port (Apache--Tomcat), our monitoring software opens a port to verify that this works -- but then does not follow that up with an actual

Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-19 Thread Lisa Woodring
On Tue, Nov 18, 2014 at 2:43 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Lisa, On 11/18/14 11:52 AM, Lisa Woodring wrote: We recently upgraded from Tomcat 6.0.29 to Tomcat 8.0.14. Everything appears to be working fine, except

Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-19 Thread Frederik Nosi
Hi Lisa, On 11/19/2014 07:28 PM, Lisa Woodring wrote: On Wed, Nov 19, 2014 at 1:20 PM, Lisa Woodring lisa.woodr...@iglass.net wrote: On Tue, Nov 18, 2014 at 2:26 PM, André Warnier a...@ice-sa.com wrote: Lisa Woodring wrote: ... In order to monitor the availability of the HTTPS/AJP port

Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-19 Thread Lisa Woodring
Actually, I received a little clarification on the monitoring software (I didn't write it). What it's trying to test is that the AJP port itself is actually accepting connections. With Apache in front in a production system, it could forward the actual request to one of several Tomcat boxes

High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-18 Thread Lisa Woodring
We recently upgraded from Tomcat 6.0.29 to Tomcat 8.0.14. Everything appears to be working fine, except that Tomcat is keeping a high # of threads (in TIMED_WAITING state) -- and the CPU has a high load low idle time. We are currently running Tomcat8 on 2 internal test machines, where we also

Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-18 Thread André Warnier
Lisa Woodring wrote: ... In order to monitor the availability of the HTTPS/AJP port (Apache--Tomcat), our monitoring software opens a port to verify that this works -- but then does not follow that up with an actual request. This happens every 2 minutes. ... This sounds like the perfect

Re: High thread count load on Tomcat8 when accessing AJP port with no request

2014-11-18 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Lisa, On 11/18/14 11:52 AM, Lisa Woodring wrote: We recently upgraded from Tomcat 6.0.29 to Tomcat 8.0.14. Everything appears to be working fine, except that Tomcat is keeping a high # of threads (in TIMED_WAITING state) -- and the CPU has a